Browse Prior Art Database

Ultrasonic Bond Station Retractable Pin Bar

IP.com Disclosure Number: IPCOM000111906D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Gorman, G: AUTHOR [+4]

Abstract

An improved design was required for the flag locators used with the actuator assembly of an Ultrasonic Bonding Station (UBS) to hold wires in place while the are bonded onto a substrate. As shown in Fig. 1, in a typical UBS configuration four wires 1 coming from a head suspension assembly 2 are held temporarily by plastic flags 4 while being bonded to a flexible substrate 3. There are usually four wires held by one flag and up to eight flags per actuator assembly.

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Ultrasonic Bond Station Retractable Pin Bar

      An improved design was required for the flag locators used with
the actuator assembly of an Ultrasonic Bonding Station (UBS) to hold
wires in place while the are bonded onto a substrate.  As shown in
Fig. 1, in a typical UBS configuration four wires 1 coming from a
head suspension assembly 2 are held temporarily by plastic flags 4
while being bonded to a flexible substrate 3.  There are usually four
wires held by one flag and up to eight flags per actuator assembly.

      A bar with eight pins (not shown for clarity) is lowered down
on all eight flags 4 and engages the slot 5 of the plastic flag.  The
bar, which is attached to an arm (not shown) is attached to a
stepping motor (also not shown).  The motor moves the bar, which
moves the flags 4 and aligns the wires 1 to the pads on the substrate
3 prior to bonding.

      After all the wires 1 of a flag 4 have been bonded, the
subsequent flags and wires must be moved to position them as well.
In prior art, moving the flag frequently caused breakage of
previously bonded wires because, once bonded, they can no longer move
as freely as they did prior to bonding.  The retractable pin bar
design disclosed herein eliminated this problem, greatly reducing
wire breakage and increasing productivity of the UBS.

      The retractable pin bar (Fig. 2) for the UBS consists of the
bar 6; eight movable pins 7; eight springs 8; eight plugs 9; and
eight air fittings 10....