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US 2017/0323659 A1Published application
Near-field transducer with adjacent high-refractive index material layer
AssigneeHGST Netherlands B.V.
InventorTakuya Matsumoto
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Abstract
A heat assisted magnetic recording (HAMR) head has a near-field transducer (NFT) with a distal end having a leading side taper inclined at an acute angle to the ABS, such that an acute angle is formed between a leading surface of the leading side taper and the ABS. A main magnetic pole is disposed in the head facing a trailing side of the NFT. A waveguide core layer is disposed in the head facing the leading side taper of the NFT, on which a high refractive index material (HRIM) layer is positioned.
Claims21
A heat assisted magnetic recording (HAMR) head, comprising:
- a leading side, a trailing side, and an air bearing surface (ABS);
- a near field transducer (NFT) disposed in the head and having a distal end with a leading side taper inclined at an acute angle to the ABS, such that an acute angle is formed between a leading surface of the leading side taper and the ABS;
- a main magnetic pole disposed in the head facing a trailing side of the NFT;
- and
- a waveguide core layer disposed in the head facing the leading side taper of the NFT;
- wherein
- a high refractive index material (HRIM) layer is positioned on the leading side taper of the NFT.
4 more elements
A HAMR head, comprising:
- a leading side, a trailing side, and an ABS;
- a NFT disposed in the head and having a distal end with a trailing side surface, leading side surface, and cross-track facing surfaces;
- a main magnetic pole disposed in the head facing the trailing side of the NFT;
- and
- a waveguide core layer disposed in the head facing the leading side surface of the NFT;
- wherein
- a HRIM layer is positioned on the trailing side surface and cross-track facing surfaces of the NFT, wherein
- the HRIM layer extends so as to form a first HRIM layer portion with a first uniform thickness covering the trailing side surface of the distal end of the NFT facing the main magnetic pole, and extends so as to form a second HRIM layer portion with a second uniform thickness covering cross-track facing surfaces of the distal end of the NFT.
5 more elements
Dependencies are inferred from the claim text.