Invention Grant
- Patent Title: Magnetic head having a reader overcoat with DLC and a recessed writer overcoat without DLC
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Application No.: US14934453Application Date: 2015-11-06
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Publication No.: US09659587B1Publication Date: 2017-05-23
- Inventor: Nattaporn Khamnualthong , Krisda Siangchaew , Sakthavorn Phongwanitchaya
- Applicant: Western Digital (Fremont), LLC
- Applicant Address: US CA Fremont
- Assignee: WESTERN DIGITAL (FREMONT), LLC
- Current Assignee: WESTERN DIGITAL (FREMONT), LLC
- Current Assignee Address: US CA Fremont
- Agency: Loza & Loza, LLP
- Agent Gabriel Fitch
- Main IPC: G11B5/127
- IPC: G11B5/127 ; G11B5/40 ; G11B5/39 ; G11B5/60 ; G11B5/00

Abstract:
A magnetic head includes a slider defining an air bearing surface (ABS) and having a trailing face approximately orthogonal to the ABS. A transducer is disposed on the trailing face and includes a reader and a writer. The writer comprises a non-ferromagnetic writer encapsulate material, and includes a ferromagnetic write pole embedded in the non-ferromagnetic writer encapsulate material. The reader comprises a non-ferromagnetic reader encapsulate material, and includes a magnetoresistive sensor stack embedded in the non-ferromagnetic reader encapsulate material. The magnetic head further includes a novel dual overcoat having a writer overcoat material disposed on the writer, and a reader overcoat material disposed on the reader. The reader overcoat material comprises diamond-like carbon (DLC), and the writer overcoat material does not comprise DLC. An example method for fabricating the novel dual overcoat is also disclosed.
Information query
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