Browse Prior Art Database

Metallizing Flat Cable

IP.com Disclosure Number: IPCOM000094253D
Original Publication Date: 1966-Aug-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Boles, JG: AUTHOR [+3]

Abstract

A length of flat cable 10 having a plurality of conductors 11 embedded in polytetrafluoroethylene 12 is metallized by coating it with aluminum as follows. First, the cable is immersed in a cleaning liquid, e. g., T. E. 35 made by du Pont, and is ultrasonically cleaned. The cable is then blown dry by use of clean air. Cable 10 is wound on a transport mechanism that includes reels 13 and 14 housed in vacuum chamber 15. Cable 10 is threaded between glow discharge plates 16 and past mask 17 overlying source 18 of aluminum.

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Metallizing Flat Cable

A length of flat cable 10 having a plurality of conductors 11 embedded in polytetrafluoroethylene 12 is metallized by coating it with aluminum as follows. First, the cable is immersed in a cleaning liquid, e. g., T. E. 35 made by du Pont, and is ultrasonically cleaned. The cable is then blown dry by use of clean air. Cable 10 is wound on a transport mechanism that includes reels 13 and 14 housed in vacuum chamber 15. Cable 10 is threaded between glow discharge plates 16 and past mask 17 overlying source 18 of aluminum.

Next, cable 10 is subjected to a glow discharge caused by pumping air out of chamber 15 and applying a high AC voltage to plates 16 so as to produce a purple cloud. Cable 10 is passed twice through this cloud and moves between plates 16 without touching either one. Next, chamber 15 is pumped to a high vacuum and some aluminum is evaporated to clean the system. Power is reduced and the system heat soaks.

Finally, aluminum is evaporated and the cable is moved past mask 17. Cable 10 is threaded so as to have two twists in the area over the mask so that all surfaces, sides and edges, of cable 10 are coated in a single pass.

The steps of cleaning, glow discharge treatment and vacuum deposition produce an adherent coat~g without having to precoat the material to improve its adhereability to the later applied metal.

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