Semiconductor chip assemblies having interposer and flexible lead
US5148266A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1990 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Sep 24, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4913
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A semiconductor chip assembly is mounted to contact pads in a compact area array. An interposer is disposed between the chip and the substrate. The contacts on the chip are connected to terminals on the interposer by flexible leads extending through apertures in the interposer. The terminals on the interposer in turn are bonded to the contact pads on the substrate. Flexibility of the leads permits relative movement of the contacts on the chip relative to the terminals and the contact pads of the substrate and hence relieves the stresses caused by differential thermal expansion. The arrangement provides a compact structure similar to that achieved through flip-chip bonding, but with markedly increased resistance to thermal cycling damage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.