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US 12,738,293 B2Granted
Writer with patterned hot seed layer
AssigneeHeadway Technologies, Inc.
InventorsHaowen Ren, Weihao Xu, Yuxuan Xiao, Shehrin Sayed, Yue Liu, Yan Wu, Yuhui Tang
Life of this patent
Estimating the term…
Abstract
The present embodiments relate to a write head design with a patterned hot seed (HS). Particularly, the HS can be patterned as part of a multi-step patterning process that can partially or completely remove portions of the HS at multiple sides to form various designs. For example, the HS can have a two-step cliff design, etching multiple steps around an un-patterned center portion, and a flared angle. The designs of the patterned HS can improve write head performance.
Claims19
A write head for a disk drive, the write head comprising:
- a main pole (MP);
- a trailing shield (TS);
- a write gap (WG) between the MP and TS;
- and
- a hot seed (HS) deposited on top of the WG and extending into an air-bearing surface (ABS) of the write head, wherein the HS comprises a top portion and one or more steps and a flared end with a pair of opposing sides of the HS disposed in parallel with one another at a flared angle relative to the ABS such that a thickness of the flared end is substantially uniform along the flared end, the top portion being disposed between the opposing sides of the flared end in a cross track direction, perpendicular to a direction extending between the MP and the TS, and wherein the top portion of the HS comprises a central portion that comprises a rectangular shape with sides that are disposed perpendicular to the ABS and a thickness that extends to a top of the HS, and etched side portions each disposed adjacent to the central portion and comprising a thickness less than that of the central portion.
2 more elements
A device comprising:
- a main pole (MP) configured to concentrate a magnetic flux;
- a trailing shield (TS);
- a write gap (WG) between the MP and TS, the WG comprising a non-magnetic material;
- a side shield and a leading shield disposed adjacent to the MP and configured to prevent magnetic flux from reaching areas outside of a desired area;
- and
- a hot seed (HS) deposited on the WG and extending into an air-bearing surface (ABS), wherein the HS comprises a top portion and one or more steps and a flared end with a pair of opposing sides of the HS disposed in parallel with one another at a flared angle relative to the ABS such that a thickness of the flared end is substantially uniform along the flared end, the top portion being disposed between the opposing sides of the flared end in a cross track direction, perpendicular to a direction extending between the MP and the TS, and wherein the top portion of the HS comprises a central portion that comprises a rectangular shape with sides that are disposed perpendicular to the ABS and a thickness that extends to a top of the HS, and etched side portions each disposed adjacent to the central portion and comprising a thickness less than that of the central portion.
3 more elements
Dependencies are inferred from the claim text.