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. 09, 2024
Filed:
Sep. 10, 2021
Western Digital Technologies, Inc., San Jose, CA (US);
Susumu Okamura, San Jose, CA (US);
Christian Kaiser, San Jose, CA (US);
Brian R. York, San Jose, CA (US);
Western Digital Technologies, Inc., San Jose, CA (US);
Abstract
A tunneling magnetoresistance (TMR) device has an improved seed layer for the lower or first ferromagnetic layer that eliminates the need for boron in the two ferromagnetic layers. The seed layer, for example a RuAl alloy, has a B2 crystalline structure with (001) texture when deposited on an amorphous pre-seed layer, meaning that the (001) plane is parallel to the surface of the TMR device substrate. The subsequently deposited first ferromagnetic layer, like a CoFe alloy, and the tunneling barrier layer, typically MgO, inherit the (001) texture of the seed layer.