Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making electrical device
Patent
1987-12-04
1989-05-09
Dees, Jose G.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making electrical device
430311, 430315, 430317, 360112, G03C 500
Patent
active
048289663
ABSTRACT:
A method of forming a Hall effect sensor for a magnetic recording head including the steps of providing a single crystal substrate having a chemically dissimilar single crystal film thereon, providing a ceramic substrate having a first magnetic pole piece of a selected thickness formed on a surface thereof, positioning the single crystal substrate and the ceramic substrate with the single crystal film and magnetic pole piece surfaces in an opposing relationship, bonding the positioned ceramic substrate to the single crystal film on the positioned single crystal substrate to form a laminated structure having a substantially thin uniform bond line, removing chemically the single crystal substrate from the single crystal film, forming a Hall effect pattern in the film while one surface of the film is exposed, and depositing a second magnetic pole piece on the formed Hall effect pattern.
REFERENCES:
patent: 3605258 (1971-09-01), Fisher et al.
patent: 4392167 (1983-07-01), Joormann
patent: 4406722 (1983-09-01), Chew et al.
patent: 4577250 (1986-03-01), Sato et al.
patent: 4587509 (1986-05-01), Pitt et al.
Bisagni Christine
Liu Shu-Huei
Mallary Michael
Dees Jos,e G.
Digital Equipment Corporation
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