Acid-cleavable acetal and ketal based epoxy oligomers
US6919420B2 · kind B2 · utility
8Cited by
4References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2002 |
| Grant date | Jul 19, 2005 |
| Priority date | — |
| Expiry date | Jul 21, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31511
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
Reworkable thermoset acid-cleavable acetal and ketal based epoxy oligomers can be B-staged into a tack free state. Compositions containing the epoxy oligomers are employed in a reworkable assembly such as a wafer-level underfilled microelectronic package.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.