Selective call radio having a ceramic substrate for circuit device interconnection
US5565261A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1994 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | Oct 31, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24917
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.