Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1988-07-28
1990-06-05
Wolff, John H.
Dynamic magnetic information storage or retrieval
Head
Hall effect
G11B 530
Patent
active
049318926
ABSTRACT:
In a MR head of the non-shunt bias type, one or more extremely thin coatings of a sacrificial conductive material are applied on the magnetoresistive strip, each such coating being so thin that it has extremely high sheet resistance in comparison to the sheet resistance of the MR strip. Because the sacrificial coating(s) is (are) in direct contact with the MR strip, the requirement for electrical conductivity between the coating(s) and the MR strip is (are) met; and because the sacrificial coating(s) is (are) of high resistivity, very little sense current is sapped away from the MR strip by the sacrificial coating(s), with attendantly very little decrease in the sensitivity of the head. By sandwiching the MR strip between equi-thick sacrificial coatings, whatever leakage currents flow through the high resistivity sacrificial coatings are productive of equal and opposite biasing effects vis-a-vis the MR strip, i.e. the sacrificial coatings produce no net bias field and are magnetically transparent to the MR strip.
REFERENCES:
patent: 4663684 (1987-05-01), Kama et al.
patent: 4825325 (1989-04-01), Howard
patent: 4841399 (1989-06-01), Kitada et al.
Cody Robert F.
Eastman Kodak Company
Wolff John H.
LandOfFree
Long life magnetoresistive head of the non-shunt bias type does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Long life magnetoresistive head of the non-shunt bias type, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long life magnetoresistive head of the non-shunt bias type will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-495852