Method of manufacturing magnetic head
AssigneeCitizen Watch Co., Ltd.
InventorMakoto Wakasugi
Life of this patent
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Abstract
In a first glass bonding process, a silicon-dioxide layer is formed on either a first or second magnetic material by vacuum evaporation. The first or second magnetic material with the silicon-dioxide layer is dipped in a warm solution containing alkali sodium or potassium for a predetermined period of time. Alkali metal is diffused on a surface of the silicon-dioxide layer to form a glass layer thereon, thereby bonding the first and second magnetic materials.
Claims12
A method of manufacturing a magnetic head having a predetermined gap kept between first and second magnetic materials, comprising the steps of:
- (a) forming on the first magnetic material a uniformly consistent silicon dioxide layer as thick as a width of the gap;
- (b) diffusing alkali metal on the surface of said silicon dioxide layer;
- (c) bonding the first and second magnetic materials with the silicon dioxide layer sandwiched therebetween;
- and
- (d) processing said bonded first and second magnetic materials with the silicon dioxide layer to obtain said magnetic head.
A method of manufacturing a magnetic head having a predetermined gap kept between first and second magnetic materials, comprising the steps of:
- (a) forming a uniformly consistent silicon dioxide layer on each of the first and second magnetic materials so that a total thickness of the silicon dioxide layers is equal to a width of the gap;
- (b) diffusing alkali metal onto the surfaces of the silicon dioxide layers;
- (c) bonding the first and second magnetic materials with the silicon dioxide layers sandwiched therebetween;
- and
- (d) processing said bonded first and second magnetic materials with the silicon dioxide layers to form the magnetic head.
A method of manufacturing a magnetic head including a read/write head and an erase head, comprising the steps of:
- (a) forming a uniformly consistent silicon dioxide layer having a predetermined thickness on a first magnetic material;
- (b) diffusing alkali metal onto a surface of the silicon dioxide layer;
- (c) bonding the first magnetic material and a second magnetic material with the silicon dioxide layer sandwiched therebetween so as to make a bar material;
- (d) processing said bar material into a predetermined shape so as to make a read/write head material;
- (e) processing said bar material into another predetermined shape so as to make an erase head material;
- (f) bonding the read/write head material and erase head material so as to obtain a core material;
- (g) slicing the core material to obtain a magnetic head core chip blank having the read/write and erase heads;
- and
- (h) processing the magnetic head core chip blank to obtain the magnetic head.
Dependencies are inferred from the claim text.