U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Chemical-mechanical polishing pad providing polishing unformity

Patent 5533923 Issued on July 9, 1996. Estimated Expiration Date: Icon_subject April 10, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Polishing pad with uniform abrasion
Patent #: 5020283
Issued on: 06/04/1991
Inventor: Tuttle

Polishing pad
Patent #: 5177908
Issued on: 01/12/1993
Inventor: Tuttle

Process for making substantially smooth diamond Patent #: 5300188
Issued on: 04/05/1994
Inventor: Tessmer, et al.

Inventors

Application

No. 419573 filed on 04/10/1995

US Classes:

451/41, Glass or stone abrading451/36, Utilizing fluent abradant451/449, Cooling451/532Comprising fibers

Examiners

Primary: Kisliuk, Bruce M.
Assistant: Edwards, Dona C.

Attorney, Agent or Firm

International Classes

B24B 001/00
B23D 011/00

Abstract

In accordance with the present invention, a polishing pad useful for polishing a semiconductor-comprising substrate is disclosed. The polishing pad is constructed to include conduits which pass through at least a portion of and preferably through the entire thickness of the polishing pad. The conduits, preferably tubulars, are constructed from a first material which is different from a second material used as a support matrix. The conduits are positioned within the support matrix such that the longitudinal centerline of the conduit forms an angle ranging from about 60° to about 120° with the working surface of the polishing pad. In the most preferred embodiment of the present invention, the conduits pass all the way through the thickness of the polishing pad and are sized to permit the flow of polishing slurry, reactive etchant material, heat transfer medium, and/or lubricant from a supply device through the conduits to the working surface of the polishing pad (at least a portion of which is in contact or near contact with the article to be polished).

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