Integrated spin valve head

Details Integrated spin valve head Integrated spin valve head

2006-02-07

2006-02-07

Davis, David D. (Department: 2652)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

06995959

ABSTRACT:
Currently, the shield-to-shield separation of a spin valve head cannot be below about 800 Å, mainly due to sensor-to-lead shorting problems. This problem has now been overcome by inserting a high permeability, high resistivity, thin film shield on the top or bottom (or both) sides of the spin valve sensor. A permeability greater than about 500 is required together with a resistivity about 5 times greater than that of the free layer and an MrT value for the thin film shield that is 4 times greater than that of the free layer. Five embodiments of the invention are described.

REFERENCES:
patent: 4340088 (1982-07-01), Geisow
patent: 4411316 (1983-10-01), Carmody
patent: 5564675 (1996-10-01), Hill, Jr. et al.
patent: 5608593 (1997-03-01), Kim et al.
patent: 5668688 (1997-09-01), Dykes et al.
patent: 5777542 (1998-07-01), Ohsawa et al.
patent: 5828527 (1998-10-01), Takada et al.
patent: 5978182 (1999-11-01), Kanai et al.
patent: 5999379 (1999-12-01), Hsiao et al.
patent: 6385017 (2002-05-01), Min et al.
patent: 6885527 (2005-04-01), Ju et al.
patent: 2003/0155131 (2003-08-01), Vick, Jr.
Baker Oil Tools, “Baker ‘M’ Series Non-Elastomeric Valves” informational publication, undated.

Affiliated with

Also associated with

Rating

Integrated spin valve head does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Integrated spin valve head, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integrated spin valve head will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3659713