Selective call radio having a ceramic substrate for circuit devi

Details Selective call radio having a ceramic substrate for circuit devi Selective call radio having a ceramic substrate for circuit devi

1994-10-31

1996-10-15

Ryan, Patrick

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428901, 34082544, 34082546, B23B 900

Patent

active

055652611

ABSTRACT:
A selective call receiver (900) includes a ceramic substrate (820) for conveying an electrical signal. The ceramic substrate (820) has at least one solder pad which includes a solder pad area (110) of an electrical conductor (120) on the ceramic substrate and a solder wettable layer (210). The electrical conductor (120) consists essentially of a conductive ceramic material. The solder wettable layer (210) is attached to the solder pad area (110). The solder wettable layer (210) includes at least 50% indium by weight. A circuit device (410) has at least one circuit terminal which is soldered to the at least one solder pad of the ceramic substrate (820) for electrical interconnection to another circuit device (410) in the selective call receiver (900).

REFERENCES:
patent: 4740657 (1988-04-01), Tsukagoshi et al.
patent: 5120665 (1992-06-01), Tsukagoshi et al.
patent: 5307508 (1994-04-01), Rollins
patent: 5317308 (1994-05-01), Tribbey
patent: 5381307 (1995-01-01), Hertz

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