West Bond 7476D Series User manual

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
iRevision: 15 April, 2004
MODEL 7476D
Manual Wedge Bonder
SERIAL # _______________
P.O. # __________________

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
ii Revision: 15 April, 2004
TABLE OF CONTENTS
PAGE
MODEL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
FEATURE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . .
7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
MACHINE SET-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
12
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20
TOOL ASSEMBLY CONVERTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27
TROUBLESHOOTING . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28
TECHNICAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
SPARE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31
WARRANTY & PATENT INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34
DRAWINGS AND SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . .
35

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
Page 1
MODEL DESCRIPTION
Model 7400D Series, Wedge-Wedge Wire Bonders, Manual X-Y-Z
Overview
Year 2000 saw the "C" Series finally replace the venerable "A" Series, and now witnesses the transition
from "C" to "D". The "C" Series brought forth improvements to the core X-Y-Z manipulator –independently
guided and locked axes –but retained the "A" Series tool assembly. Now "D" Series brings across the
revolutionary "E" wire clamps and groups them with their drive motor and a full wavelength transducer on
a new tool assembly pivoted as before. The X-Y-Z follower mechanism has improved linear ways and
accepts the new tool assemblies of the wire bonders as well as other cast-body tool assemblies.
The angled wedge wire bond configuration is shown below.
Application
Machines of this series bond aluminum or gold wires from 0.0007 in. to 0.002 in. diameter, by the wedge-
wedge technique using ultrasonic energy to attach aluminum wire at room temperature and adding work
piece heat for gold wire. Wire is fed to the work point by two methods selectable by exchange of wire
clamps; either diagonally through the heel of the bonding wedge, or vertically down through a hollow
wedge. Either allows programmed motions to clamp, break, and feed wire continuously, but requires front-
to-back bonding direction
Bond Tool Head Assembly
The all-new tool assembly of this series features wire clamps brought over from "E" Series. The Clamps
are air-opened and spring-closed, and have self-contained closure pivots. A separate pivot about an axis
located to serve both overhead and angled feed generates the clamp motions along their lines of feed
action. To change between angled feed and overhead feed, it is necessary only to exchange the small
clamp assemblies and to change the wire drag means. Alignment of clamps to the tool is facilitated by
individual adjustments along three axes. Actuation of all clamp motion is by the same spiral cam of an
onboard motor. Appropriate clamp motion settings for each method are configured in software and are
retained in non-volatile memory. Motions toward the tool are spring-driven, while the more powerful motor
drives away from the tool –to ease concerns during set-up.
The ultrasonic transducer is K~Sine Model K~74D-W, 1½ wavelength, operating at a nominal frequency of
63 KHz and with tool length of 0.750-in. dropped 0.656-in.below center. Ultrasonic power supply is K~Sine
built-in, five Watts, dual channel.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
Page 2
MODEL DESCRIPTION
Two values of bond force in the overall range of 18 to 90 grams are adjusted at the tool assembly as two
preset positions of a compression spring. Either high or low force setting can be programmed for each
bond. Initiation of bonding is upon the opening of the firing switch.
The elevation at which to feed new wire is measured from each bond by an optical encoder on the Z Axis.
More importantly, this encoder can initiate clamp re-closing to control wire loop arch consistently. Radiant
tool heat with panel mounted, constant current control is included.
Mechanical
Throat reach is 5.125-in. from tool home position back to the machine lower panel. Vertical clearance
above the work plane with 0.750-in. tool length is 0.438-in. over a reach of 3.750-in. and is 0.188-in. over
the balance of reach. This clearance applies for either angled or overhead clamps, except immediately
behind the tool for angled. The pivot radius of the tool assembly is the same 8.688-in. extant for
West·Bond’s history, as is the pivot radius of 12.000-in. of the X-Y-Z manipulator assembly. Range of
movement of the tool by manipulator control is 0.563-in. vertically and 0.625-in. in horizontal directions
with an 8/1 ratio of mechanical advantage.
The work platform is a bolt-on assembly. An optional adjustable height platform is available as Feature -
79.
Preparation of a new end of the wire stock and the threading of that end into the feed hole of a 45?bond
tool can be done automatically by machine motions following a simple location of the wire relative to the
tool. The method is patented and requires use of special bond tools available from West·Bond.
ESD Protection
Protection against Electrostatic Discharge is implemented by finishing exposed tool assemblies and other
moving parts by Electroless Nickel plating, which is conductive; and all exposed painted parts with a
powder-coated paint that is dissipative.
Electrical Software and Hardware
Control of machine logic, motor motions, and Ultrasonic energy is programmed to and executed by
West·Bond Part No 8100 CPU containing a Motorola 68000 microprocessor and 256 KB of nonvolatile
RAM. All machine configuration constants and bond settings are programmable at the machine panel,
prompted by a series of "screens" displayed on a 4-line 40-character LCD. Three separate buffers of bond
settings for a wire type can be entered and selected during bonding by a selector switch. Each wire type
can have approximately 21 stitch bonds, each with its own settings of ultrasonic power and time. All
programmed values are displayed during bonding. At "home", various options are enabled.
Definitions of Models of this Series:
?Model No. 7476D. This machine with interchangeable wire clamps for bonding by either angled-
feed or vertical-feed wedge bond methods.
?Model No. 7440D. Insulated Wire Bonder Series, -- see website for specifications.
Features available for this Series:
?Feature No. 79. Adjustable height work platform.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
Page 3
MODEL DESCRIPTION
Machine Configuration
The microscope recommended for this series is Nikon SMZ-660 with Luxuray 21-LED shadowless
illuminator. Neither microscope nor illuminator is included. One recommended bonding tool is included. All
work holders are priced separately. Quite a large number of previously designed special work holders,
both heated and unheated, are listed under Products, Workholder Assemblies, on West·Bond’s Web Site.
Those with Status of "Current" are maintained in stock and can be ordered with machines: This selection
covers most needs. If a selection must be made with Status "Available Not Stocked", then it must be
ordered on a separate purchase order.
Services Required
Compressed air, regulated to 50 psi, is required. Connection is via 1/4-inch tubing.
Electrical service required is 100-120 VAC, 50-60 Hz, 2 Amps. For 200-240 VAC, an external step-down
transformer is required which must be secured by end-user as electrical codes vary from country to
country.
Dimensions
Machine size is 22" deep X 19" wide X 12" high, exclusive of microscope, or 18" in height to scope
eyepieces. Weight is 60 lb. uncrated, or 95 lb. crated.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
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FEATURES DESCRIPTION
The specifications define Features that add additional capabilities or utilities to the basic machine models,
and cross-reference those models with which the Features may be combined.
Feature -45:Free Furnace Workholder
This furnace is free in the sense that it is not connected to the
machine but may be readily inter-changed
with the Free Anvil normally used for
ultrasonic bonding, giving workpiece heat
capability to any machines of the 5K or 7K
Series. May also be used with Model 4500B.
This Free Furnace is the approximately the same height and
generally is the same shape as the Free
Anvil workholders. There is a plastic grip ring
around the lower base by which to handle the
furnace and a radially projecting push-button
for operating the pivoted edge grip lever
clamp. Work adapters are one-piece,
containing holes for the two cartridge heaters
and for the thermocouple, and is assembled
above the base on a single stand-off.
This is a basic non-rotating workholder for substrates up to 1.000” (25.4mm) x 1.000” (25.4mm).
The work piece is held by means of a mechanical clamp, with a single rail with
adjustable backstop from which many variations are derived.
Feature -45D: Free Furnace, for Drop In Adapter
The “D” version of the Feature -45 Free Furnace provides a
drop-in type work adapter. The work adapter
and workpiece are contained by vacuum.
This Free Furnace is the same height, and generally the
same shape, as the Feature -45 Free
Furnace. Work adapters are one-piece, and
are positioned in the heater plate and held by
vacuum. The heater plate contains holes for
two cartridge heaters and thermocouple, and
is assembled above the base on a single
standoff. Adapters are available for a variety
of packages.
THIS FREE FURNACE IS LIMITED TO A MAXIMUM OPERATING TEMPERATURE OF 175?C.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
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FEATURES DESCRIPTION
Feature -45E: Free Furnace, 2”x2” Adapter, Vacuum Hold
The “E” version of the basic -45 Free Furnace modifies
the upper portion of the furnace to extend its surface area
to 2.000”(50.8mm) x 2.000”(50.8mm). The work piece is
held by vacuum that has a 0.250”(6.35mm) x
0.250”(6.35mm) cross pattern, with a 0.0625 diameter
vacuum hole. The remaining surface is flat in anticipation
of holding substrates up to 2” square. Overall height of
the furnace is the same as all other furnaces of the -45
Series.
THIS FREE FURNACE IS LIMITED TO A MAXIMUM OPERATING TEMPERATURE OF 175?C.
Feature -45G: Free Furnace, 2”x2” Adapter, Mechanical Hold
Non-rotating workholder for substrates up to
2.000”(50.8mm) x 2.000”(50.8mm). The “G” version is
the same as described under Feature -45E except that
the substrate is held in position by mechanical grip with an
adjustable backstop rather than by vacuum. All other
specifications are the same, including maximum operating
temperature.
THIS FREE FURNACE IS LIMITED TO A MAXIMUM OPERATING TEMPERATURE OF 175?C
Feature -45J: Free Furnace with Rotating Adapter
A rotating 3.250"(82.55mm) diameter
workholder adapter that is used with assembly
A-6000-XXX workholder kits. Work piece is held
by mechanical clamp, with a adjustable
backstop and vacuum. It is designed for use
with wedge-wedge type bonders where it is
necessary to pre-rotate the workpiece prior to
making a wire bond connection. Instead of
rotating the entire furnace as with other furnaces
of the -45 series. The heater block,
thermocouple, heaters and base are held
stationary while the adapter is free to rotate by a
thumb wheel projecting through the base.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
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FEATURES DESCRIPTION
Feature –79: Adjustable height work platform
Work Platform with Adjustable Height for
variable package thickness. Adjusts
through a range of 0.625”(15.875mm),
apportioned 0.094”(2.39mm) above and
0.531(13.49mm) below the nominal
elevation of 2.688(68.28mm) above the
fixed platform surface. Highly
recommended for deep access bonding
machines.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
Page 7
CAUTIONS
Contained in this section are continuous to be observed during 7476D / 7600C Installation and Operation.
Wiring
All machine wiring has common ground connected to machine chassis and continuous through the power
supply, cord and cord plug. Make sure the receptacle for this plug has a good ground connection.
Safety and Comfort
Some ergonomic studies suggest that long periods of repetitive motion may be traced to certain types of
physical discomfort leading to possible injury. We have compiled specific instructions herewith to minimize
your chances of experiencing carpal tunnel syndrome (CTS), tendonitis, and tenosynovitis.
It is recommended that your work environment be comfortable for your work situation. A carefully planned
work environment can actually increase productivity. WEST?BOND recommends that you adopt the
following steps for a healthy physical and mental approach to your work.
Exercises
Many motor oil-manufacturing companies that your car engine is most subject to wear and tear when you
first start up in the morning often claim it. This is due to the lack of oil on the metal bearing surfaces to
offer protection when the car is first started. To a great extent, the same can be said for the tendons and
bones and joints they form in your body. In the early morning hours, your body tends to retain fluid from its
over night rest, and the first time these tendons and joints are put to usage, there is often a feeling of
stiffness and tightness, and when utilized in an abrupt fashion, can often lead to inflammation and at times
injury.
Therefore, it is considered appropriate if not mandatory for most people engaged in physical activities
such as sports or heavy labor such as construction, to perform a variety of warm-up exercises before
beginning their job. We have found the same philosophies and many of these same exercises just as
beneficial for those individuals who are placed in a seated position for long periods of time where they
utilize primarily their upper extremities, and most importantly, their hands and wrists.
We are therefore, suggesting the following gentle warm-up program to be done by you before leaving for
work. Begin by gently tilting your head both to the right and left side, to the point of comfortable tension.
Next, tilt your head forward and backward, and lastly, turn your head both to the left and to the right. Each
of these positions is taken to the end of their natural range of motion and held for a brief period of time. Do
not take any of these movements beyond the point of comfort.
Next, for the shoulders, perform a series of simple, slow, shoulder circles in both a forward and backward
direction. Five to ten repetitions in each direction should be enough to warm up the shoulder musculature.
Next, while standing, lift your arms laterally out to the side, away from your body and over your head.
Repeat this motion five times. For added benefit, make large, wrist circles with your hands while your arms
are overhead.
Lastly, and possibly most importantly, it is important that you carefully flex and extend your wrist prior to
beginning your workday. Using the opposite hand to bend the wrist downward does this. This is best done
with the arm in a forward position with the elbow straight. To assist in wrist extension, lift your wrist up,
using the palm of the opposite hand, pressing against the fingers to assist in lifting the wrist. These
stretches are done only to the point of comfortable tension and are repeated with both hands.
These basic exercises will get you off to a good start in the morning and allow your drive to work to be
more comfortable and less likely to increase the tension and tightness in your upper back, shoulders and
hands.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
Page 8
CAUTIONS
Work Station Exercises
Sometimes it is only when we take breaks at work that we realize how stiff or uncomfortable we have
become from working in a seated position. When we concentrate intensely on our work, these types of
discomfort often go unnoticed and therefore, we recommend the following exercise program.
After Work Cool-Down Exercises
When you return home from work, it is helpful to relax the hard working muscle groups by repeating your
morning exercise program. Many people also find that taking a gentle walk or similar forms of activity
provide a nice change of pace from the immobile routine encountered at work. Please check with your
physician, however, before beginning any type of exercise program.
Take periodic breaks several times during the work schedule. Gently press your hands against a table,
stretch, and hold for several seconds. Stretch and massage your fingers, hands, wrists, and forearms
throughout the day. Shake your hands and fingers to relieve any tension and to promote blood flow.
Rotate your shoulders forward and backward in a full circle several times daily. Try to use different muscle
groups throughout the day, i.e. if sitting for prolonged periods, get up and walk around several times a day.
If you experience pain any time during the operation of your WEST?BOND machine, consult a qualified
health professional.
Chair and Table Top
When evaluating your workstation, pay particular attention to those surfaces that come in contact with
your wrist and forearms. Sharp edges or hard surfaces should be modified to form a work surface that is
comfortable at the point of contact. Reshaping corners and applying a more comfortable softer surface in
the work area can be extremely helpful.
The chair should be comfortable and provide firm support to the lumbar region (lower back). The chair
should be adjustable in height so that your forearms form approximate right angles with the upper arms
while hands rest upon the tabletop. Next, ensure feet rest flat on the floor and, if not, use a footrest that is
high enough so that your thighs are reasonably parallel to the floor while seated. During the course of
operating your WEST?BOND machine, maintain this recommended posture—any slouching puts
unnecessary strain on your back and may weaken muscles over time.
Microscope / Monitor
It is important to look away from the microscope eyepieces and/or monitor frequently. Try to focus on an
object about 20 feet away from several seconds. Eyepieces of the microscope should be clean and
microscope should be frequently calibrated for parfocal viewing.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
Page 9
CAUTIONS
Micromanipulator
The hand controls on your WEST?BOND machine have been designed for minimal exertion of the hand
and fingers. The position of the control knob is purposely set to coincide with a natural rest position of the
hand (fetal position). During operation, the operator should rest his/her hand, wrist, and forearm on the
tabletop so that the thumb, index and middle fingers gently grip the manipulator knob. With the work piece
centered in the microscope, and the tool centered to the optics, usual movement or excursion of the
manipulator is usually within plus or minus one-half inch, which is well within natural flexure of the thumb
and fingers gripping the control knob. The force required to move the mechanism is somewhat equivalent
to pushing a pencil while writing. Following the recommendations set forth in “Exercises” above vastly
relieves any perception of muscle fatigue.
The last key point; all these guidelines should be applied to your homework station and home activities,
particularly home computers. They should also be applied to video games and your recreational television
viewing.
After a long day at work, your body does not need more of the same type of activity when you return
home. Remember, diversity of physical activity may well be the simplest and most meaningful
recommendation to avoid repetitive stress syndrome such as carpal tunnel syndrome.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
Page 10
3
INSTALLATION
STEP 1
Remove the accessory box, identify and account for all contents.
v
ITEM
PART NO.
v
ITEM
OPTION
Manipulator Control Arm
(P/N 8253)
Adjustable Height Platform
(optional)
Microscope Yoke
(P/N 8280)
Microscope
(optional)
100 PSI
Regulator
Illuminator
(optional)
90 Degree Clamp Assembly
(P/N 9049)
Illuminator Nut
(optional)
Tool, Bonding (45 degree)
(P/N 50674)
Work Holder
(optional)
Tool, Bonding (90 degree)
(P/N 50780)
Check Packing Slip
Gauge, Bonding Tool
(P/N 34
75.013)
STEP 2
While still attached to the shipping board, lift 7476D out of box.
CAUTION: DO NOT LIFT BY THE X-Y-Z MANIPULATOR ARM.
STEP 3
Remove (4 or 6) shipping bolts securing the 7476D to the shipping board.
NOTE! It is suggested to save packing material for use during any future equipment relocation.
-79 Feature
If the machine comes with the adjustable height platform option, take some foam or soft material and
place the machine on its side to attach the platform.
STEP 4
Position the 7476D where it will be used.
STEP 5
Loosen (2) front screws securing cover, and tilt cover
back.
STEP 6
Remove the shipping bracket securing tool head
assembly ?. (1 screw)
STEP 7
Remove the shipping bracket securing tool assembly
?to the main plate. (3 Screws)
STEP 8
Remove shipping bracket securing manipulator
counterbalance weight ?to main plate. (2 Screws)
STEP 9
Remove microscope yoke from accessory box and
install.
STEP 10
Attach illuminator to microscope. Install microscope.
Plug illuminator into front panel receptacle.
FRONT PANEL RECEPTACLE:
For use with K~Sine Illuminators only.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
Page 11
INSTALLATION
STEP 11
Remove Manipulator Arm from accessory box and install in its receptacle by tightening the two(2) socket
head cap screws.
STEP 12
Install the Printed Circuit Boards making sure that they
are firmly seated and the cable connector to the
Machine Control Board is firmly in place.
STEP 13
Locate the compressed air fitting on the rear panel.
Secure the regulator to the back panel. Connect a 1/4"
O.D. polyethylene line to supply. (50 psi nominal).
STEP 14
The standard 7476D configuration requires electric
power of 115 VAC, 50 Hz or 60 Hz. The machine is
fused for 1 Amp; the fuse is located on the right rear
panel. Alternatively, if machine has been configured for 230 VAC, 50 Hz or 60 Hz, the fuse is ½ Amp.
The 7476D is now ready for operation. Please refer to the next section to understand
several important aspects of successful wire bonding with the 7476D.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
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MACHINE SET-UP
Bond Tool Installation
The choice of bonding tools is instrumental to high quality bonding. The 7476D requires that the shank
diameter of the tool be 1/16" and that the length of the tool, for the 45 degree wire feed, should be 0.750".
If Tool Assembly No. 9049 has been specified, offering vertical wire feed, then a 0.750" tool length is
recommended. A shorter (.625”) or a longer (.828”) tool may be used for deep access. The Tool Gauge
required for proper tool installation is 3475.013
45 DEGREE WIRE FEED (Assembly No. 9048)
DEEP ACCESS WIRE FEED (Assembly No. 9049)
Loosen the transducer set screw and insert the bonding tool through bottom of transducer, It may be
helpful to have clamps open when positioning tool. The bonding tool should be positioned according to
the drawing below for a good starting position prior to running the Ultrasonic Positioning Utility (UPU)
Ultrasonic Positioning Utility (UPU)
For years the tools position has been determined by a tool gauge to place the bond foot at the design
bond point. In continued testing, particularly of the D-Series with longer tools, the realization that there was
no one placement that was best for all tools in all conditions.
The Ultrasonic Positioning Utility is to provide an indication of the correct placement for use each time a
tool is installed. The UPU consists of a built-in circuit to measure ultrasonic efficiency, and a software
routine to display a relative number during tool installation. Maximizing this number numerically shows the
effect of different placements until conditions are optimized.
BOND TOOL POSITION SETUP
Press and hold the FEED/OPEN switch in the FEED position. Turn the Machine on. Use the EDIT button
to get new readings for tool drop. Move tool up or down to get the highest number possible.
Set tool for maximum reading.
***** BOND TOOL POSITION SETUP
Change tool extension to maximize value.
Current value = 27 Old value = 21
EDIT = Read new value FEED = Escape

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
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MACHINE SET-UP
Bonding Wire Installation
The 7476D is equipped with a standard 1/2" ball bearing spool mount. Also available is the 2" spool
dispenser. Slide the 1/2" spool over the spool mount such that the wire de-spools over the top (counter
clock-wise when viewed from the right side). The 2" dispenser will attach to the right side of the
microscope mount. Carefully route wire through guides, transducer, clamp and bonding tool. To open
clamp, press the FEED / OPEN switch to the right once. To close the clamp or feed more wire through the
tool, press the FEED / OPEN switch to the left once. The FEED / OPEN switch is located on the lower left
control panel. See below for wire route drawings.
The 45º clamp blades need the wire fed through them to keep the wire from coming out of the clamps
during looping. There is a small shelf that the wire needs to pass over before the tool is threaded.
Wire Path
SIDE VIEW
Vertical Feed
SIDE VIEW
45 Degree
Wire Path

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
Page 14
MACHINE SET-UP
Work Platform Adjusting (Feature -79)
The height adjustment of the work platform is critical for quality wire bonding. If the work platform is not
adjusted properly, the bonding tool may not be perpendicular to the work surface. To check for proper
height adjustment simply compare the height of the surface requiring bonding to the position of the
bonding wedge while holding the micromanipulator in its maximum down position. When properly set, the
lowest required bonding level should be approximately 20 -30 mils (635 -762?m) above the tip of the
bonding tool.
If adjustment to the work platform is required, simply locate the adjustment knob on front edge of the work
platform and turn to adjust as required.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
Page 15
OPERATION
The operation of the 7476D has been specifically designed for versatile and dependable operation. The
following information will allow the operator to utilize the 7476D to its full potential. This section is
specifically directed at operator use and any questions related to PROGRAMMING or
TROUBLESHOOTING will be discussed in their respective sections.
Operator Controls
In this section the individual front panel items will be addressed. Programming aspects will be discussed
in the Programming section.
POWER Switch
Activates entire 7476D, including the illuminator. Upon power-up, the microprocessor will complete several
internal tests and offer failure codes for any problems detected.
RESET Switch
Primarily used as a quick way to exit any sub-menu, even in the programming mode, and return to the
bonding mode and “Home” options. In addition, power-up diagnostic tests are repeated whenever RESET
is pressed.
EDIT Switch
The operator may enter Bond and Machine Settings Sequence by pressing this button while at the “Home”
menu. The selected buffer displayed at the “Home” menu will be the buffer accessed when the EDIT
button is pressed. Thus be sure to select the desired buffer number prior to pressing the EDIT button.
Once in any of the sub-menu routines, this EDIT switch is used to page through the available menus and
options. See Programming.
TEST Switch
This switch allows the operator to test the ultrasonic link to the transducer. The U/S light, next to the
switch should illuminate when TEST switch is pressed. The transducer is activated when this switch is
pressed. Do not activate this switch for more than 3 seconds at a time. This switch is an excellent way to
offer ultrasonic energy to the Bonding Tool while threading.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
Page 16
OPERATION
Operator Controls
U/S Lamp
This light indicates ultrasonic activity. Notice the light will flash during bonding and during any other time
that ultrasonic power is used. If this light does not illuminate while the TEST switch is pressed, contact
your local service representative or the WEST?BOND factory for advice.
CLAMP Switch
The CLAMP switch performs several functions. To open the wire clamp, push the switch to the right
position, labeled OPEN. To close the wire clamp and feed wire through the tool, push the switch to the left
position, labeled FEED. Press the switch to the left when the clamp is already closed to activate the clamp
through one complete cycle and feed additional wire through the bonding tool. The feed cycles will
automatically repeat if the CLAMP switch is held to the left. Hold the CLAMP switch to the right to effect
auto-repeating long strokes (Vertical Feed Only).
If the Self-Thread feature has been activated in the Machine Settings sequence, the CLAMP switch will
respond as follows: Press the switch to the right to open the clamps and allows the operator to pre-load
the special Self-Threading tool. Press the switch to the left to retract the wire clamp, which allows the wire
to align itself to the feed-through hole. Press the switch left again to feed the wire through the feed-through
hole. Press the switch left now and the clamp will feed wire through the bonding tool.
TAIL Switch
The TAIL switch has been designed for small geometry bonding pads. Although the 7476D tail
consistency is excellent, you may occasionally wish to shorten or possibly lengthen a specific tail offering.
Bumping the switch up will retract the clamp and shorten the tail. Bumping the switch down will move the
clamp forward, offering additional tail. The clamp will not move if it has reached its mechanical limit. This
switch is also used to adjust numeric values during the programming of either the bond settings or the
machine settings (see Programming).
BUFFER Switch
The BUFFER switch is used to change quickly among the three buffers. Buffers will store the Bond
Settings for unique packages. (See Programming for these settings).
TOOL HEAT Dial
Turn control knob from zero to activate the Radiant Heater. See the Options section for a chart of
approximate temperatures for various Tool Heat settings.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
Page 17
OPERATION
Wire Bonding
The actual execution of wire bonding with WEST?BOND’s 7476D is rather straightforward. The patented
micromanipulator, positioned to the right of the work platform, is directly linked to the tooling head
assembly through an 8:1 ratio. This mechanical ratio and sophisticated mechanical link allow the operator
to accomplish extremely precise and fine adjustments to the tooling head position.
To produce the first wire bond, simply use the micromanipulator to lower the bonding tool to the bond
location and gently touch the tip of the tool to the bond surface. The Work Sensing Firing Switch senses
contact of the tool assembly with the actual work surface to activate the ultrasonic energy. If the “Beep On
Contact” option has been selected, an audible beep will be heard while the bond is being made. The
machine then opens the wire clamp and prepares for bond number two.
After completing the first bond, gently lift the micromanipulator and move the bonding tool through the
looping path. When the tool has been lifted to the programmed loop height, an additional beep will be
heard. This is only an indicator of the tooling head position. Once the operator has reached the crest of
the loop and reverses direction, moving down toward the second bond site, the machine will automatically
close the clamp at the programmed distance below the crest. See Programming for instructions on
changing the loop height indicator and drop-before-clamp distances.
Accomplishing the second bond is a repeat of the first bond sequence. After the terminating bond, the wire
clamp will automatically close and pull back to terminate the wire and will then wait until the operator lifts
from the terminating bond site before feeding new tail for the next wire.

WEST•BOND MODEL 7476D SERIES INSTRUCTION MANUAL
Page 18
OPERATION
Basic Operation
The following is an interpretation of the messages displayed by the 7476D during operation. The
rectangles on the left represent the LCD and examples of its contents. Additional LCD messages are
described in the “Programming and Troubleshooting” sections.
HOME
Bond 1 of 2 Buffer 1 Ready for first bond
Power: 300 Time: 30 ms
EDIT = Bond & Machine settings, 45?feed.
BONDING SEQUENCE (Begin by using the X-Y-Z Micromanipulator to touch the tool to the bond pad.)
Bond 1 of 2 Buffer 1 First bond is complete.
Power: 300 Time: 30 msTool is still in contact.
Wire clamp is open. User must lift the tool from the bond.
Must lift X-Y-Z Micromanipulator.
Bond 2 of 2 Buffer 1 Tool is off surface, ready to make second bond
Power: 350 Time: 50 ms
Wire clamp is open.
Proceed to last bond.
Bond 2 of 2 Buffer 1 Tool has descended, wire clamp has closed;
Power: 350 Time: 50 ms ready for second bond.
NORMAL THREADING SEQUENCE (Begin by pressing CLAMP switch to the right to open clamp.)
Bond 2 of 2 Buffer 1 This is briefly seen only if threading for the
Power: 350 Time: 50 ms first time since power-up
Wire clamp is open.
Verifying Clamp Home Limit.
Bond 2 of 2 Buffer 1 Terminating bond data is automatically loaded.
Power: 350 Time: 50 ms
Wire clamp is open. “Press FEED switch” means press the CLAMP switch
Thread the tool, and press FEED switch. to the left.
Bond 2 of 2 Buffer 1
Power: 350 Time: 50 ms
Ready to bond off wire tail.