Metal working – Method of mechanical manufacture – Electrical device making
Patent
1990-10-31
1992-02-11
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
65 42, 360103, G11B 542
Patent
active
050865536
ABSTRACT:
A flying-type composite magnetic head includes (a) a magnetic core constituted by a pair of core pieces bonded together by a first glass portion, at least one of opposing surfaces of the core pieces being formed with a thin magnetic metal layer; (b) a non-magnetic slider having a slit for receiving the magnetic core; and (c) a second glass portion for fixing the magnetic core in the slit; the first glass portion having a softening point lower than a first bonding temperature by 70.degree. C. or more and a yielding temperature higher than a second bonding temperature, and the second glass portion having a softening point lower than a second bonding temperature by 70.degree. C. or more. The first bonding temperature T.sub.1 (.degree.C.) for forming the first glass portion satisfies the following relation:
REFERENCES:
patent: 3562444 (1971-02-01), Hoogendoorn et al.
patent: 3823416 (1974-07-01), Warner
patent: 4897915 (1990-02-01), Ito
patent: 4916563 (1990-04-01), Kawaie
Examiner's Report to the Comptroller, Application No. 8907043.7, Jul. 12 1989, by Examiner Dr. E. P. Plummer.
Goto Ryo
Nitanda Fumio
Tomitani Tadafumi
Toyoda Manabu
Ushijima Makoto
Hall Carl E.
Hitachi Metals Ltd.
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