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:
Dec. 15, 2009
Filed:
Jul. 26, 2007
Cherng-chyi Han, San Jose, CA (US);
Mao-min Chen, San Jose, CA (US);
Laurie Lauchlan, Saratoga, CA (US);
Lei Zhang, San Jose, CA (US);
Cherng-Chyi Han, San Jose, CA (US);
Mao-Min Chen, San Jose, CA (US);
Laurie Lauchlan, Saratoga, CA (US);
Lei Zhang, San Jose, CA (US);
Headway Technologies, Inc., Milpitas, CA (US);
Abstract
A manufacturing process is provided where aggressive (i.e. tight tolerance) stitching offers several advantages for magnetic write heads but at the cost of some losses during pole trimming. This problem has been overcome by replacing the alumina filler layer, that is used to protect the stitched pole during trimming, with a layer of electroplated material. Because of the superior step coverage associated with the plating method of deposition, pole trimming can then proceed without the introduction of stresses to the stitched pole while it is being trimmed.