Semiconductor chip module
US4970577A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1989 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | Apr 12, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/10704
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A semiconductor chip module includes semiconductor chips each of which has contacts on its entire front face. A multi-layered organic circuit board having a small dielectric constant is provided for mounting the semiconductor chips. Intermediate ceramic substrates having the same thermal expansion coefficient as that of the semiconductor chip, are also provided. Each such intermediate ceramic substrate has contacts on its front and back faces corresponding to those of the semiconductor chip. These contacts are electrically connected directly in a one-to-one relationship. The contacts on the semiconductor chip and the corresponding ones on the front face of the intermediate ceramic substrates are connected by solder. The contacts on the back face of the intermediate ceramic substrate and the corresponding contacts on the front face of the multi-layered ceramic circuit board are connected by respective conductive pins having a predetermined flexibility and rigidity through a predetermined gap therebetween. With this arrangement, the relative displacement due to a thermal expansion difference between the intermediate ceramic substrate and the multi-layered organic circuit board is per…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.