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:
Mar. 30, 2004
Filed:
Jul. 26, 2001
Michael Allen Seigler, Pittsburgh, PA (US);
Andrew Robert Eckert, Pittsburgh, PA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
A method for making a magnetic sensor for a disk drive read head, the method comprising the steps of depositing a magnetoresistive stack on a surface of a first layer of material, depositing a resist layer on a first portion of the magnetoresistive stack, removing a second portion of the magnetoresistive stack not covered by the resist layer, depositing a layer of additional material on the magnetoresistive stack, the resist material, and the surface of the first layer, removing the additional material from sidewalls of the resist material, and using a lift-off process to remove the resist material. Magnetic sensors made by the above process are also included. A method for making a semiconductor device is also provided, the method comprising the steps of depositing a layer of first material on a surface of substrate, depositing a resist layer on a first portion of the first material, removing a second portion of the layer of the first material not covered by the resist layer, depositing a layer of additional material on the first material, the resist layer, and the surface of the substrate, removing the additional material from sidewalls of the resist layer, and using a lift-off process to remove the resist layer.