Weiwei LI

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Tianjin, CN

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Patents Grantslast 30 patents

Information Patent Grant
Method for removing contaminants from silicon wafer surface
- Patent number 7,578,890
- Issue date Aug 25, 2009
- Yuling Liu
- C11 - ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES FATTY ACIDS...
Information Patent Grant
Method of eliminating surface stress of silicon wafer
- Patent number 7,524,235
- Issue date Apr 28, 2009
- Yuling Liu
- B28 - WORKING CEMENT, CLAY, OR STONE

Patents Applicationslast 30 patents

Information Patent Application
METHOD OF ELIMINATING SURFACE STRESS OF SILICON WAFER
- Publication number 20070298690
- Publication date Dec 27, 2007
- Yuling LIU
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Application
METHOD FOR REMOVING CONTAMINANTS FROM SILICON WAFER SURFACE
- Publication number 20070277847
- Publication date Dec 6, 2007
- Yuling LIU
- H01 - BASIC ELECTRIC ELEMENTS