Browse Prior Art Database

Rework Feature for an Actuator Assembly

IP.com Disclosure Number: IPCOM000120125D
Original Publication Date: 1991-Mar-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 2 page(s) / 69K

Publishing Venue

IBM

Related People

Brooks Jr, WW: AUTHOR [+2]

Abstract

Disclosed is a method of facilitating the rework of populated actuators which are found to have faulty electronic components after assembly. Lead termination to the actuator flex cable is an increasingly expensive operation, so any rework of the completed assembly is very expensive.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 65% of the total text.

Rework Feature for an Actuator Assembly

      Disclosed is a method of facilitating the rework of
populated actuators which are found to have faulty electronic
components after assembly.  Lead termination to the actuator flex
cable is an increasingly expensive operation, so any rework of the
completed assembly is very expensive.

      The problem of reworking the flex cable stems from the
difficulty of manually sorting and placing leads onto the correct
flex cable pads.  If the leads could somehow be left in the correct
position for rebonding to the next flex cable, then much of the labor
associated with the rework would be eliminated. This invention
provides a method of accomplishing this.

      Before the initial flex cable head lead bonding process, a thin
film rework tape is placed on the flex cable.  See the figure for
details.  By whatever means, the head leads are connected to the flex
cable pads, with one result being that the leads end up laying over
the top of the rework tape.  Once all of the head leads are connected
to their respective pads, the leads would be bonded to the front
surface of the rework tape.  This could be accomplished by having the
front surface of the tape be a heat-softening plastic and pushing all
of the wires into this material with a single hot bar.  Or, an
adhesive material could be applied over the top of the leads (such as
a U/V curable liquid adhesive or a heat-softening dry film material).
The adhesive serves to ke...