Magnetic recording heads employing multiple lapping guides

Details Magnetic recording heads employing multiple lapping guides Magnetic recording heads employing multiple lapping guides

1991-08-15

1993-05-11

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Hall effect

360121, 360122, G11B 539, G11B 5187, G11B 529

Patent

active

052106675

ABSTRACT:
A thin film magnetic head and a method for making the thin film head by the use of electrical lapping guides includes the use of a resistive lapping guide that has a height dimension and an electrical resistance that optimizes the results of the comparison of the resistive lapping guide to a finished lapping guide. The resistive lapping guide is not lapped during the lapping process. The finished lapping guide is lapped and the resistive comparison between the two determines the stopping of the lapping process. An as-lapped guide which is of the same dimensions as the finished lapping guide after lapping can also be included. An interleaved magnetic head having alternating magneto-resistive read elements and inductive write elements can be precisely lapped by sensing the resistance of the lapping guide elements and using a formula to determine the final resistance of the finished lapping guide to halt the lapping process.

REFERENCES:
patent: 4458279 (1984-07-01), Katz
patent: 4511942 (1985-04-01), Valstyn
patent: 4523243 (1985-06-01), Billington
patent: 4675986 (1987-06-01), Yen
patent: 4689877 (1987-09-01), Church
patent: 4739562 (1988-04-01), Kracke et al.
patent: 4914868 (1990-04-01), Church et al.

Affiliated with

Also associated with

Rating

Magnetic recording heads employing multiple lapping guides does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic recording heads employing multiple lapping guides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic recording heads employing multiple lapping guides will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1355621