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. 12, 2006
Filed:
May. 23, 2001
Shanlin Hao, Eden Prairie, MN (US);
Jeffery K. Berkowitz, Carver, MN (US);
Peter R. Goglia, Edina, MN (US);
Shanlin Hao, Eden Prairie, MN (US);
Jeffery K. Berkowitz, Carver, MN (US);
Peter R. Goglia, Edina, MN (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
The present invention is a method of using direct head electrical response signals for feedback process control. When lapping the air bearing surface of a bar of sliders, a magnetic field is applied to the air bearing surface and a bias current is applied to the reader elements. A head electrical response, such as amplitude or resistance change, is measured and is used to control the lapping device. Using a fixture which allows individual slider machining, a controller can be used to monitor the head response signal for each slider on the bar and individually control each slider on the bar so that material removal over each slider proceeds until a predetermined target stripe height is reached.