Colloidal silica chemical-mechanical polishing concentrate
US9422457B2 · kind B2 · utility
4Cited by
12References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2015 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | Jun 25, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L21/3212
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A chemical-mechanical polishing concentrate includes at least 10 weight percent of a colloidal silica abrasive particle dispersed in a liquid carrier having a pH in a range from about 1.5 to about 7. The colloidal silica abrasive includes an aminosilane compound or a phosphonium silane compound incorporated therein. The concentrate may be diluted with at least 3 parts water per one part concentrate prior to use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.