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Welding Through an Insulator

IP.com Disclosure Number: IPCOM000093737D
Original Publication Date: 1966-Jan-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Bolda, FJ: AUTHOR [+2]

Abstract

Etched copper lines can be welded to copper terminals through a plastic layer. This is effected by coating the terminal with an alloy consisting of 96% copper and 4% phosphorous. The welding is accomplished by pressing resistive welding tip 10 against copper line 12 and supplying a current pulse to heat tip 10 and thus vaporize plastic layer 14. This permits copper line 12 to be forced against alloy coated terminal 16 by tip 10. The latter then melts the 96% copper and 4% phosphorous alloy coating 18 on terminal 16 to wet line 12. A connection between line 12 and terminal 16 is thus formed. The heat from tip 10 is concentrated at the point of weld. Therefore layer 14 remains everywhere except at the point of weld.

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Welding Through an Insulator

Etched copper lines can be welded to copper terminals through a plastic layer. This is effected by coating the terminal with an alloy consisting of 96% copper and 4% phosphorous. The welding is accomplished by pressing resistive welding tip 10 against copper line 12 and supplying a current pulse to heat tip 10 and thus vaporize plastic layer 14. This permits copper line 12 to be forced against alloy coated terminal 16 by tip 10. The latter then melts the 96% copper and 4% phosphorous alloy coating 18 on terminal 16 to wet line 12. A connection between line 12 and terminal 16 is thus formed. The heat from tip 10 is concentrated at the point of weld. Therefore layer 14 remains everywhere except at the point of weld.

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