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);
Kuok San Ho, Santa Clara, CA (US);
Tsann Lin, Saratoga, CA (US);
Scott Arthur Macdonald, San Jose, CA (US);
Huey-ming Tzeng, San Jose, CA (US);
Marie-Claire Cyrille, San Jose, CA (US);
Kuok San Ho, Santa Clara, CA (US);
Tsann Lin, Saratoga, CA (US);
Scott Arthur MacDonald, San Jose, CA (US);
Huey-Ming Tzeng, San Jose, CA (US);
Hitachi Global Storage technologies Netherlands BV, Amsterdam, NL;
Abstract
An in-line lapping guide uses a contiguous resistor in a cavity to separate a lithographically-defined sensor from the in-line lapping guide. As lapping proceeds through the cavity toward the sensor, the resistance across the sensor leads increases to a specific target, thereby indicating proximity to the sensor itself. The contiguous resistor is fabricated electrically in parallel to the sensor and the in-line lapping guide. The total resistance across the sensor leads show resistance change even when lapping through the cavity portion. One method to produce the contiguous resistor is to partial mill the cavity between the sensor and the in-line lapping guide so that a film of metal is left. Total resistance across leads is the parallel resistance of the sensor, the contiguous resistor, and the in-line lapping guide.