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. 10, 2010
Filed:
Mar. 28, 2008
Christian R. Bonhote, San Jose, CA (US);
Malika D. Carter, San Jose, CA (US);
David A. Dudek, San Jose, CA (US);
Wen-chien D. Hsiao, San Jose, CA (US);
John W. Lam, San Jose, CA (US);
Vladimir Nikitin, Campbell, CA (US);
Christian R. Bonhote, San Jose, CA (US);
Malika D. Carter, San Jose, CA (US);
David A. Dudek, San Jose, CA (US);
Wen-Chien D. Hsiao, San Jose, CA (US);
John W. Lam, San Jose, CA (US);
Vladimir Nikitin, Campbell, CA (US);
Abstract
A magnetic read/write head is produced with an insert layer between the substrate and the magnetic transducer. The insert layer has a lower coefficient of thermal expansion than the substrate, which reduces the temperature pole tip recession (T-PTR) of the head because the insert layer is an intervening layer between the substrate and magnetic transducer. The insert layer is produced by plating, e.g., an Invar layer over the substrate prior to fabricating the magnetic transducer. The Invar layer is annealed and the structure planarized prior to depositing a non-magnetic gap layer followed by the fabrication of the magnetic transducer.