Browse Prior Art Database

Improved Flat Flexible Cable Connector

IP.com Disclosure Number: IPCOM000046660D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Bilsback, MS: AUTHOR [+2]

Abstract

Packaging plasma panels would appear formidable because of the large number of high density connections that must be made between the electronics and the panel. During early panel development, it became apparent that pitches, i.e., center-to-center distances between adjacent contacts, of .025" or less, would be required for plasma panels. Adding to the small pitch were two additional complicating factors. The glass substrate is not practically adaptable to the normal pin-type connectors, and the thin evaporated copper metallurgy is extremely susceptible to abrasion, corroding even in mildly hostile environments.

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Improved Flat Flexible Cable Connector

Packaging plasma panels would appear formidable because of the large number of high density connections that must be made between the electronics and the panel. During early panel development, it became apparent that pitches,
i.e., center-to-center distances between adjacent contacts, of .025" or less, would be required for plasma panels. Adding to the small pitch were two additional complicating factors. The glass substrate is not practically adaptable to the normal pin-type connectors, and the thin evaporated copper metallurgy is extremely susceptible to abrasion, corroding even in mildly hostile environments. A connection system having minimum effect on cost, performance, and service life, while providing low failure rate and low cost, was constructed as follows to provide interconnection between the panel and circuit drive cards. The design approach for interconnecting the panel metallurgy to the drive cards is illustrated in the figure. The improved design consists of an etched, polyimide/copper flexible circuit 1 pressed into intimate contact with the panel metallurgy on the glass surface 3 at one end and metallurgy 5 on drive card 7 at the other end by the force of U-shaped spring clips 9, 11 and elastomer pads 13, 15. The connector spring clips 9, 11 are designed in shape, length, and material thickness to simplify manufacturing and eliminate the need for individual fixturing of each spring in heat treatment and plat...