Tapered magnetic main pole structure with variable peg gap for heat-assisted magnetic recording technology
AssigneeHeadway Technologies, Inc.
InventorsShehrin Sayed, Weihao Xu, Moris Musa Dovek, Yuhui Tang, Hong Guo
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Abstract
Writer head products for heat-assisted magnetic recording devices and methods of making the same are disclosed. The writer heads include multiple layers including a waveguide blocking layer, a waveguide layer, a near-field transducer layer, a heat sink layer, and a peg layer. The peg layer may comprise a small triangular section that extends from an air-bearing surface into the optical component. The writer heads further include a main magnetic pole adjacent to the optical component.
Claims29
A writer head for a heat-assisted magnetic recording (HAMR) device, the writer head comprising:
- an optical component including:
- a triangular layer having a tapered edge;
- a first cladding layer positioned adjacent to the triangular layer;
- a waveguide (WG) layer positioned adjacent to the first cladding layer;
- a second cladding layer positioned adjacent to the WG layer;
- a near field transducer (NFT) layer positioned adjacent to the second cladding layer;
- a heat sink layer positioned adjacent to the NFT layer;
- and
- a triangular peg gap layer positioned adjacent to the heat sink layer and comprising a tapered angle of about 20 degrees to about 70 degrees;
- and
- a magnetic main pole positioned adjacent to the triangular peg gap layer and the heat sink layer and having a saturation magnetization of about 24 kG or greater.
Dependencies are inferred from the claim text.