Sectional porous carrier forming a temporary impervious support
US11004718B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Oct 31, 2018 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Jul 1, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2221/68381
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Compositions and designs are described for a sectional porous carrier used in processing microelectronics where thin device substrates are affixed by adhesive to the carrier and form an impervious bonded stack that is resistant to thermal and chemical products during processing and is easily handled by a substrate handling vacuum robot, and subsequently allows rapid removal (debonding) in batch operations by directional penetration into sectional porous regions by selective liquids which release the carrier from the device wafer without harm. The invention carrier with porous regions is used for temporary support of thin and fragile device substrates having capabilities of selective penetration of chemical liquids to pass through the porous regions, access and breakdown the bonding adhesive, and allow it to release without damage to the device substrate. The sectional porous nature of the carrier allows passive diffusion of chemical liquids, the manner which in contrast to mechanical, thermal, or radiative methods, is considered to be a higher yield practice and one which enables batch processing in a manufacturing environment utilizing practices of high throughput and low cost. Pr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.