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:
Feb. 19, 2008
Filed:
Jun. 27, 2007
Wen-yaung Lee, San Jose, CA (US);
Thomas E. Shatz, Morgan Hill, CA (US);
Dulip Ajantha Welipitiya, Morgan Hill, CA (US);
Brian R. York, San Jose, CA (US);
Wen-yaung Lee, San Jose, CA (US);
Thomas E. Shatz, Morgan Hill, CA (US);
Dulip Ajantha Welipitiya, Morgan Hill, CA (US);
Brian R. York, San Jose, CA (US);
Hitachi Global Storage Technology Netherlands B.V., Amsterdam, NL;
Abstract
A magnetoresistive sensor having a substrate that has been treated with nitrogen (nitrogenated). The nitrogenated substrate includes an alumina base layer and a thin top layer of crystalline alumina that has had a very small amount of nitrogen deposited on top. The amount of nitrogen deposited on top of the alumina is less than or equal to two monolayer, and is preferably less than on monolayer. The amount of nitrogen deposited on top of the alumina substrate is not enough to constitute a layer of nitrogen, but affects the structure of the alumina to cause the alumina to have a desired crystalline structure and an extremely smooth surface.