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. 06, 2004
Filed:
Jul. 12, 2002
Li-Yan Zhu, San Jose, CA (US);
SAE Magentics, (H.K.) Ltd., Hong Kong, CN;
Abstract
An integrated lapping guide (ILG) is described including at least one read-head and an electronic lapping guide (ELG). In one embodiment, the ELG is offset from the height of the read-head. Resistance between the read-head and the ELG can be measured during the lapping process. During the initial phase of the lapping process, the ELG dominates the change in ILG resistance and provides a long-range stripe-height control allowing for inclination and bending of the row of magneto-resistive (MR) heads. During the latter phases of the lapping process, the read-head dominates the change in ILG resistance and provides a short-range, uniform read-head resistance control. In this embodiment, the transition between the long-range stripe-height control and the short-range, uniform read-head resistance control is smooth, providing a marked benefit to the read-head manufacturing process.