IC mounting circuit substrate and process for mounting the IC
US5250469A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1991 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Dec 13, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49144
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Herein disclosed is an IC mounting circuit substrate which comprises: a predetermined circuit conductor pattern formed on one face of an insulating layer; IC pad junctioning bumps junctioned electrically to predetermined portions of said circuit conductor pattern and projecting to the outside of a circuit substrate through said insulating layer; and a transparent insulating coating formed at the side of said circuit conductor pattern for transmitting an irradiation beam for heating and melting said bumps. As a fundamental process for mounting an IC on the IC mounting circuit substrate thus constructed, there is adopted a process for connecting the pads of said IC chip and said bumps electrically while heating and melting said bumps by the action of the irradiation beam supplied concentratedly from the side of said transparent insulating coating to said bump portions with said IC chip being arranged over said bumps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.