IP Library › Granted Patent US 7,593,186
Granted Patent B2
US 7,593,186 · App. 11/046,740 · Granted Sep 22, 2009

P1 write pole with shoulder formation

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Quick Facts
Patent No.
US 7,593,186
App. No.
11/046,740
Granted
Sep 22, 2009
Kind
B2
Abstract

A magnetic disk drive head is disclosed including a write head, which includes a P 1 layer having a pedestal portion, a gap layer formed on the P 1 layer, and a P 2 layer formed on the gap layer. The P 1 layer includes a shoulder formation having a neck portion and a beveled portion. Also disclosed is a disk drive having a write head with a P 1 layer with shoulder formation, and a method for fabricating a write pole for a magnetic recording head having a P 1 layer with shoulder formation.

Claims (32)

1. A magnetic disk drive head including a write head, comprising:

a P 1 layer which includes an N 1 layer and an N 3 layer, where said N 1 layer has a neck portion and a beveled portion, and said N 3 layer has a beveled portion, a straight portion and a main body;

a gap layer having a gap thickness, formed on said P 1 layer; and

a P 2 layer formed on said gap layer;

wherein said P 1 layer includes a shoulder formation which includes said N 1 layer neck portion and said N 1 layer beveled portion, and said N 3 layer beveled portion.

2. The magnetic disk drive head of claim 1 , wherein:

said beveled portions of said N 1 layer and said N 3 layer have has a bevel angle in the range of 10-70 degrees.

3. The magnetic disk drive head of claim 1 , wherein:

said neck portion has a thickness of 0.5-2.5 times said gap thickness.

4. The magnetic disk drive head of claim 1 , wherein:

said shoulder formation has a thickness of 2-5 times said gap thickness.

5. The magnetic disk drive head of claim 1 , wherein:

said main body of said N 3 layer has a bevel angle, which is in the range of 5-15 degrees.

6. The magnetic disk drive head of claim 1 , further comprising:

a seed layer formed on said gap layer.

7. A disk drive comprising:

at least one hard disk;

at least one magnetic head adapted to fly over said hard disk for writing data to said hard disk, said magnetic head including a magnetic write head including:

a P 1 layer which includes an N 1 layer and an N 3 layer, where said N 1 layer has a neck portion and a beveled portion, and said N 3 layer has a beveled portion, a straight portion and a main body;

a gap layer having a gap thickness, formed on said P 1 layer; and

a P 2 layer formed on said gap layer;

wherein said P 1 layer includes a shoulder formation which includes said N 1 layer neck portion and said N 1 layer beveled portion, and said N 3 layer beveled portion.

8. The disk drive of claim 7 , wherein:

said beveled portions of said N 1 layer and said N 3 layer have has a bevel angle in the range of 10-70 degrees.

9. The disk drive of claim 7 , wherein:

said neck portion has a thickness of 0.5-2.5 times said gap thickness.

10. The disk drive of claim 7 , wherein:

said shoulder formation has a thickness of 2-5 times said gap thickness.

11. The disk drive of claim 7 , wherein:

said main body of said N 3 layer has a bevel angle, which is in the range of 5-15 degrees.

12. The disk drive of claim 7 , further comprising:

a seed layer formed on said gap layer.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 5, 2016
From: HGST NETHERLANDS B.V.
To: WESTERN DIGITAL TECHNOLOGIES, INC.
Reel/Frame 040819/0450 →
CHANGE OF NAME Recorded Oct 25, 2012
From: HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V.
To: HGST NETHERLANDS B.V.
Reel/Frame 029341/0777 →