Invention Grant
- Patent Title: Two-dimensional magnetic recording (TDMR) read head structure with different stacked sensors and disk drive incorporating the structure
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Application No.: US16792010Application Date: 2020-02-14
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Publication No.: US10777222B1Publication Date: 2020-09-15
- Inventor: Xiaoyong Liu , Chih-Ching Hu , Daniele Mauri , Ming Mao , Guanxiong Li , Yukimasa Okada , Ying Hong
- Applicant: Western Digital Technologies, Inc.
- Applicant Address: US CA
- Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee Address: US CA
- Agency: Patterson & Sheridan, LLP
- Agent Steven Versteeg
- Main IPC: G11B5/39
- IPC: G11B5/39 ; G11B5/48 ; G01R33/09

Abstract:
A hybrid read head structure for two-dimensional magnetic recording (TDMR) in a disk drive has two stacked current-perpendicular-to-the plane magnetoresistive (CPP-MR) read heads or sensors substantially aligned with one another in the along-the track direction to enable both sensors to read data from the same data track. The structure is a hybrid structure formed on the disk drive slider with the lower sensor being a dual free layer (DFL) or scissoring type of CPP-MR sensor and the upper sensor being a single free layer (SFL) type of CPP-MR sensor.
Information query
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