Method and apparatus for removal of semiconductor chips from hybrid circuits
US3969813A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 15, 1975 |
| Grant date | Jul 20, 1976 |
| Priority date | — |
| Expiry date | Aug 15, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1983
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are disclosed for removal of defective semiconductor chips from hybrid integrated circuits. The apparatus includes a jet nozzle which directs at least four high pressure water jet streams to the area surrounding the defective chip. The nozzle is also provided with a fixture for sealing off this area from the rest of the circuit by making contact to the encapsulant on the circuit. The jet streams bore through the encapsulant within the area defined by the fixture and are deflected by the ceramic substrate to an area under the chip thereby lifting off the chip. The invention therefore provides relatively fast removal of the defective chips without damaging the ceramic substrates or other components of the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.