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:
Jul. 17, 2007
Filed:
Sep. 30, 2004
Marie-claire Cyrille, San Jose, CA (US);
Ching Hwa Tsang, Sunnyvale, CA (US);
Huey-ming Tzeng, San Jose, CA (US);
Marie-Claire Cyrille, San Jose, CA (US);
Ching Hwa Tsang, Sunnyvale, CA (US);
Huey-Ming Tzeng, San Jose, CA (US);
Hitachi Global Storage Technologies Netherlands BV, Amsterdam, NL;
Abstract
Magnetic sensors are fabricated with an initial length that is slightly longer than their finished length. The sensors are then critically lapped and exposed for target signal output. The final target length of the sensors is obtained by first exposing the sensors to a photolithographic process and then directly lapping the excess length from the sensors. The length of sensor material that is removed is in the range of several nanometers. The target end point during lapping may be ascertained by detecting the change in resistance between the sensor and leads in the lapping tool as the excess material is lapped from the sensor.