Method and apparatus for cleaning semiconductor wafers using compressed and/or pressurized foams, bubbles, and/or liquids
US8535451B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2008 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Oct 23, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S134/902
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
An apparatus and method are disclosed in which a semiconductor substrate having a surface containing contaminants is cleaned or otherwise subjected to chemical treatment using a foam. The semiconductor wafer is supported either on a stiff support (or a layer of foam) and foam is provided on the opposite surface of the semiconductor wafer while the semiconductor wafer is supported. The foam contacting the semiconductor wafer is pressurized using a form to produce a jammed foam. Relative movement between the form and the semiconductor wafer. such as oscillation parallel and/or perpendicular to the top surface of the semiconductor wafer. is then induced while the jammed foam is in contact with the semiconductor wafer to remove the undesired contaminants and/or otherwise chemically treat the surface of the semiconductor wafer using the foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.