Cardlike electronic device
US5418688A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1993 |
| Grant date | May 23, 1995 |
| Priority date | — |
| Expiry date | Mar 29, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/087
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic device (100) comprises a first substrate (102) having a first circuit pattern disposed thereon which is selectively processed to provide pretinned connection pads (108, 116, 124, 132, 140) for connection to at least one electronic component (142) and a second circuit pattern disposed on a second substrate (104). The second circuit pattern disposed on the second substrate (104) is selectively processed to further provide pretinned connection pads (110, 118, 126) for connection to the first circuit pattern, and the second substrate (104) further has relief provided within a portion thereof to position the at least one electronic component (142) with respect to the pretinned connection pads (108, 116, 124, 132, 140) on the first circuit pattern. The pretinned connection pads (108, 116, 124, 132, 140, 110, 118, 126) are processed using a low residue fluxing agent to enable processing of the first (102) and second (104) substrates and the at least one electronic component (142) in a single operation through an envelope heating device without a requirement for cleaning after reflow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.