Is a
Patent attributes
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Venkata R. Balagani0
Aden Martin Allen0
Charles C. Garretson0
Danny Cam Toan Lu0
Douglas R. McAllister0
Hung Chih Chen0
James C. Wang0
Jeffrey P. Schmidt0
...
Date of Patent
March 1, 2022
0Patent Application Number
170119520
Date Filed
September 3, 2020
0Patent Citations
Patent Citations Received
Patent Primary Examiner
Patent abstract
A retaining ring can be shaped by machining or lapping the bottom surface of the ring to form a shaped profile in the bottom surface. The bottom surface of the retaining ring can include flat, sloped and curved portions. The lapping can be performed using a machine that dedicated for use in lapping the bottom surface of retaining rings. During the lapping the ring can be permitted to rotate freely about an axis of the ring. The bottom surface of the retaining ring can have curved or flat portions.
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