Invention Grant
- Patent Title: Near field transducers (NFTS) and methods of making
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Application No.: US15167622Application Date: 2016-05-27
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Publication No.: US09620152B2Publication Date: 2017-04-11
- Inventor: Michael C. Kautzky , Mark H. Ostrowski , David Michael Grundman , Martin Blaber
- Applicant: SEAGATE TECHNOLOGY LLC
- Applicant Address: US CA Cupertino
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: US CA Cupertino
- Agency: Mueting, Raasch & Gebhardt, P.A.
- Main IPC: G11B5/33
- IPC: G11B5/33 ; G11B11/00 ; G11B5/31 ; G11B5/00

Abstract:
Methods of forming a NFT the methods including forming a hard mask positioned over at least a portion of the rod, the hard mask including at least one layer; patterning a resist mask over the hard mask, the resist mask having an edge positioned over at least a portion of the rod; etching a portion of the hard mask to expose a back edge of the rod and to form a back edge of the hard mask, wherein the back edge of the rod is equivalent to the back edge of the peg; and wherein a forward portion of the rod which is the portion of the rod forward of the back edge is covered by the hard mask; forming a disc mask including a void configured to form a disc of a NFT, the disc mask being formed over at least a portion of the hard mask so that the exposed back edge of the rod is within the void configured to form the disc; etching an area exposed in the void of the disc mask to remove both a rear portion of the rod and the surrounding dielectric up to the back edge of the hard mask edge; depositing a disc material in the etched void, wherein the back edge of the hard mask defines the front edge of the disc and the back edge of the rod is in contact with the front edge of the disc; and polishing the deposited disc material to form a top surface substantially planar with the top of the forward rod portion.
Public/Granted literature
- US20160351214A1 NEAR FIELD TRANSDUCERS (NFTS) AND METHODS OF MAKING Public/Granted day:2016-12-01
Information query
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