Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Circuit Overlay Adapter Assembly for Circuit Changes

IP.com Disclosure Number: IPCOM000084563D
Original Publication Date: 1975-Dec-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Saucier, WD: AUTHOR

Abstract

Printed-circuit (PC) boards are reworked by connecting the board to a separate overlay carrying circuit additions through conductive elastomer pins mounted on an intermediate carrier.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Circuit Overlay Adapter Assembly for Circuit Changes

Printed-circuit (PC) boards are reworked by connecting the board to a separate overlay carrying circuit additions through conductive elastomer pins mounted on an intermediate carrier.

Integrated circuit (IC) modules are soldered to circular or square lands surrounding holes on a printed-circuit board, so that the IC module pins extend through the other side of the board. Additions to the circuit on this board are deposited on the overlay board, and connect selected ones of a complete matrix of holes and circular or square lands. A nonconductive carrier board retains a complete matrix of conductive elastomer pins, which deform to mate with the overlay holes and lands at one end and the solder fillets and IC pins at the other when the three boards are fastened together.

The assembly can easily be disconnected so that circuit deletions can be made on the circuit board by removing printed-circuit paths with a scriber in a conventional manner. If desired, IC pins may also be interconnected by soldered wires routed to avoid interference with the elastomer pins.

1

Page 2 of 2

2

[This page contains 4 pictures or other non-text objects]