Dynamic magnetic information storage or retrieval – Head – Core
Patent
1993-03-29
1994-07-26
Wolff, John H.
Dynamic magnetic information storage or retrieval
Head
Core
360125, G11B 5147
Patent
active
053330862
ABSTRACT:
A thin film two-pole inductive magnetic head for a computer disk drive assembly. The head comprises a substrate, a first pole formed over the substrate, a gap layer formed over the first pole and a second pole formed over the gap layer. The first and second poles have their distal ends coupled together in a yoke region, while their proximal ends terminate at their tips in an air bearing surface. A leading surface of the first pole extends back toward the yoke region at an acute angle to the air bearing surface. The head reduces the amplitude and high frequency content of secondary pulses in a readback waveform so as to ease the task of electronically isolating the main pulses for downstream processing of the read data.
REFERENCES:
patent: 4130846 (1978-12-01), Best
patent: 4190872 (1980-02-01), Jones et al.
patent: 4644322 (1987-02-01), Heim
patent: 4876790 (1989-10-01), Grimm et al.
patent: 4878290 (1989-11-01), Masud et al.
patent: 5051856 (1991-09-01), Narishige et al.
patent: 5181152 (1993-01-01), Yan et al.
patent: 5240740 (1993-08-01), Frey et al.
IBM/TDB vol. 2, No. 1, Jun. 1959, pp. 42-43 "Magnetic Head" by Poch et al.
Frey Karl A.
Mallary Michael
Cefalo Albert P.
Digital Equipment Corporation
Hudgens Ronald C.
Wolff John H.
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