Recycled glass and glass-ceramic carrier sustrates
US11823967B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2020 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Jun 28, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24479
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A glass or glass-ceramic carrier substrate, the substrate having undergone at least one complete cycle of a semiconductor fabrication process and having also undergone a reclamation process following the end of the semiconductor fabrication process; the glass or glass-ceramic carrier substrate comprising at least one of the following properties: (i) a coefficient of thermal expansion of less than 13 ppm/° C.; (ii) a Young's Modulus of 70 GPa to 150 GPa; (iii) an IR transmission of greater than 80% at a wavelength of 1064 nm; (iv) a UV transmission of greater than 20% at a wavelength of 255 nm to 360 nm; (v) a thickness tolerance within the same range as the thickness tolerance of the carrier substrate before undergoing at least one complete cycle of the semiconductor fabrication process; (vi) a total thickness variation of less than 2.5 μm; (vii) a failure strength of greater than 80 MPa using a 4-point-bending test; (viii) a pre-shape of 50 μm to 300 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.