The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 2016
Filed:
Mar. 12, 2013
Applicant:
Western Digital Technologies, Inc., Irvine, CA (US);
Inventors:
Mark D. Moravec, Lamlukka, TH;
Phanphat Taechangam, Yannawa, TH;
Alan H. Brothers, Amphur Mueang, TH;
Assignee:
Western Digital Technologies, Inc., Irvine, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B24B 31/06 (2006.01); B24B 37/04 (2012.01); B29C 71/04 (2006.01);
U.S. Cl.
CPC ...
B24B 37/048 (2013.01); B29C 71/04 (2013.01);
Abstract
Magnetic heads are fabricated by slicing and dicing wafers into row bars, which undergo frontside lapping and backside lapping. These lapping processes, as well as other processes, induce stresses on the row bars that are released prior to finalizing the magnetic head. Ultrasonic impact technology is used to release the stress in the row bars and to clean the row bars at the same time. Ultrasonic impact technology is used after the row bars have been wire bonded without having to de-bond the row bars.