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David E. Weldon
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San Jose, CA, US
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last 30 patents
Information
Patent Grant
Linear polisher and method for semiconductor wafer planarization
Patent number
6,231,427
Issue date
May 15, 2001
Lam Research Corporation
Homayoun Talieh
B24 - GRINDING POLISHING
Information
Patent Grant
Wafer polishing head
Patent number
5,803,799
Issue date
Sep 8, 1998
OnTrak Systems, Inc.
Konstantin Volodarsky
B24 - GRINDING POLISHING
Information
Patent Grant
Control of chemical-mechanical polishing rate across a substrate su...
Patent number
5,800,248
Issue date
Sep 1, 1998
Ontrak Systems Inc.
Anil K. Pant
B24 - GRINDING POLISHING
Information
Patent Grant
Linear polisher and method for semiconductor wafer planarization
Patent number
5,692,947
Issue date
Dec 2, 1997
Ontrak Systems, Inc.
Homayoun Talieh
B24 - GRINDING POLISHING
Information
Patent Grant
Wafer polishing machine with fluid bearings and drive systems
Patent number
5,593,344
Issue date
Jan 14, 1997
Ontrak Systems, Inc.
David E. Weldon
B24 - GRINDING POLISHING
Information
Patent Grant
Polishing pad cluster for polishing a semiconductor wafer
Patent number
5,575,707
Issue date
Nov 19, 1996
Ontrak Systems, Inc.
Homayoun Talieh
B24 - GRINDING POLISHING
Information
Patent Grant
Wafer holder for semiconductor wafer polishing machine
Patent number
5,571,044
Issue date
Nov 5, 1996
Ontrak Systems, Inc.
Hooman Bolandi
B24 - GRINDING POLISHING
Information
Patent Grant
Wafer polishing machine with fluid bearings
Patent number
5,558,568
Issue date
Sep 24, 1996
Ontrak Systems, Inc.
Homayoun Talieh
B24 - GRINDING POLISHING