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:
Oct. 25, 2011
Filed:
Dec. 20, 2007
Jeffrey R. Childress, San Jose, CA (US);
Robert E. Fontana, Jr., San Jose, CA (US);
Jui-lung LI, San Jose, CA (US);
Sergio Nicoletti, Sinard, FR;
Jeffrey R. Childress, San Jose, CA (US);
Robert E. Fontana, Jr., San Jose, CA (US);
Jui-Lung Li, San Jose, CA (US);
Sergio Nicoletti, Sinard, FR;
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
A three terminal magnetic sensing device (TTM) having a trackwidth defined in a localized region by a patterned insulator, and methods of making the same, are disclosed. In one illustrative example, one or more first sensor layers (e.g. which includes a 'base' layer) are formed over a collector substrate. A patterned insulator which defines a central opening exposing a top layer of the one or more first sensor layers is then formed. The central opening has a width for defining a trackwidth (TW) of the TTM. Next, one or more second sensor layers are formed over the top layer of the one or more first sensor layers through the central opening of the patterned insulator. The one or more second sensor layers may include a tunnel barrier layer formed in contact with the top layer of the one or more first sensor layers, as well as an 'emitter' layer. Various embodiments and techniques are provided.