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:
Aug. 14, 2007
Filed:
Sep. 20, 2004
Negar Karimi, San Jose, CA (US);
John I. Kim, San Jose, CA (US);
Andrew Crehan Walker, Carmel, CA (US);
Yeak-chong Wong, San Jose, CA (US);
Negar Karimi, San Jose, CA (US);
John I. Kim, San Jose, CA (US);
Andrew Crehan Walker, Carmel, CA (US);
Yeak-Chong Wong, San Jose, CA (US);
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
Methods for fabricating pole piece tips for a magnetic transducer are disclosed. The ion-milling operations for trimming Pand notching Pare controlled using feed-forward and feedback. The preferred method of the invention includes steps for setting four time values used in different phases of the ion-milling process based on feed-forward and feedback of measured values including the Pwidth measured in the mask, multiple PB measurements and measurement of the notch depth.