Self-aligned trimmed pole

Details Self-aligned trimmed pole Self-aligned trimmed pole

2008-04-15

2008-04-15

Miller, Brian E. (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

11091160

ABSTRACT:
A trimmed upper pole piece for a magnetic write head is presented, said pole piece having a uniform width above and below a write gap layer and said pole piece being formed on a pedestal of uniform width projecting from a planar surface of a magnetic shield layer. Prior art methods of trimming pole pieces to a final width using ion-beam etches produce pole pieces with thickness differentials due to the etch resistant nature of the typical alumina write-gap filling material. The present pole piece uses NiCr, NiFeCr or Ru as write gap filling materials because they have an etch rate which is substantially equal to the etch rate of the other layers forming the pole piece and allow a uniform trimming to occur.

REFERENCES:
patent: 5438747 (1995-08-01), Krounbi et al.
patent: 5874010 (1999-02-01), Tao et al.
patent: 5878481 (1999-03-01), Feng et al.
patent: 5901432 (1999-05-01), Armstrong et al.
patent: 6141183 (2000-10-01), Wu et al.
patent: 6243939 (2001-06-01), Chen et al.
patent: 6329211 (2001-12-01), Terunuma et al.
patent: 6385008 (2002-05-01), Santini et al.
patent: 6524491 (2003-02-01), Liu et al.
patent: 6737281 (2004-05-01), Dang et al.
patent: 6778357 (2004-08-01), Tabakovic et al.
patent: 6912106 (2005-06-01), Chen et al.
patent: 6947255 (2005-09-01), Hsiao et al.
patent: 2001/0005301 (2001-06-01), Komuro et al.
patent: 2003/0030940 (2003-02-01), Matono
patent: 07-262519 (1995-10-01), None
patent: 2000-105906 (2000-04-01), None
patent: 2000-215409 (2000-08-01), None
patent: 2003-006813 (2003-01-01), None

Affiliated with

Also associated with

Rating

Self-aligned trimmed pole does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self-aligned trimmed pole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-aligned trimmed pole will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3914352