Magnetic head incorporating an amorphous magnetic metallic film having a thickness equal to a track width

Claim 2

A magnetic head including at least a core for constituting a magnetic circuit, and a magnetic gap formed in said core, said core comprising: a support substrate having a first face which is brought into contact with a magnetic recording medium; a portion including said first face of said support substrate or said substrate as a whole being made of a non-magnetic high-resistance material; and an amorphous magnetic metallic film deposited on one or a plurality of faces of said support substrate, which abut on said first face of said support substrate, and deposited at least on said non-magnetic high-resistance material portion, said amorphous magnetic metallic film having a thickness equal to a track width.

Claim 3

A magnetic head as claimed in claim 1, wherein said thickness of said amorphous magnetic metallic film is between 1 and 30 μm.

Claim 4

A magnetic head as claimed in claim 1, wherein said amorphous magnetic metallic film has a thickness of between 1 and 5 μm.

Claim 5

A magnetic head as claimed in claim 1, wherein said support substrate is composed of said non-magnetic high-resistance material portion and a portion made of a material having high permeability in one unit.

Claim 6

A magnetic head as claimed in claim 1, wherein said amorphous magnetic metallic film includes at least one element selected from iron family elements consisting of iron, nickel and cobalt.

Claim 7

A magnetic head as claimed in claim 1, wherein said amorphous magnetic metallic film is made of at least one element selected from the group consisting of iron family elements composed of iron, nickel and cobalt, semi-metals, group IVa elements and group Va elements.

Claim 8

A magnetic head including at least a core for constituting a magnetic circuit, and a magnetic gap formed in said core, said core comprising: a first core portion and a second core portion in one unit so that said first core portion and said second core portion confront each other through said magnetic gap therebetween; at least either one of said first core portion and said second core portion being formed with a first face which is brought into contact with a magnetic recording medium; a portion including said first face of at least either one of said first core portion and said second core portion being made of a non-magnetic high-resistance material; and an amorphous magnetic metallic film deposited on one face of at least either one of said first core portion and said second core portion, which abuts on said first face, said amorphous magnetic metallic film having a thickness equal to a track width.

Claim 9

A magnetic head including at least a core for constituting a magnetic circuit, and a magnetic gap formed in said core, said core comprising: a first core portion and a second core portion in one unit so that said first core portion and said second core portion confront each other through said magnetic gap therebetween; at least either one of said first core portion and said second core portion being formed with a first face which is brought into contact with a magnetic recording medium; a portion including said first face of at least either one of said first core portion and said second core portion being made of a non-magnetic high-resistance material; and an amorphous magnetic metallic film deposited on one face of at least either one of said first core portion and said second core portion, which abuts on said first face, said amorphous magnetic metallic film having a thickness equal to a track width.

Claim 10

A magnetic head as claimed in claim 7, wherein said first core portion and said second core portion are made of a material of high permeability.

Claim 11

A magnetic head as claimed in claim 7, wherein said thickness of said amorphous magnetic metallic film is between 1 and 30 μm.

Claim 12

A magnetic head as claimed in claim 7, wherein said thickness of said amorphous magnetic metallic film has a thickness of between 1 and 5 μm.

Claim 13

A magnetic head as claimed in claim 7, wherein said amorphous magnetic metallic film includes at least one element selected from iron family elements consisting of iron, nickel and cobalt.

Claim 14

A magnetic head as claimed in claim 7, wherein said amorphous magnetic metallic film is made of at least one element selected from the group consisting of iron family elements composed of iron, nickel and cobalt, semi-metals, group IVa elements and group Va elements.

Claim 15

A magnetic head including at least a core for constituting a magnetic circuit, and a magnetic gap formed in said core, said core being composed of: a first core portion and a second core portion in one unit so that said first core portion and said second core portion confront each other through said magnetic gap therebetween; at least either one of said first core portion and said second core portion being formed with a first face which is brought into contact with a magnetic recording medium; a portion including said first face of at least either one of said first core portion and said second core portion being made of a non-magnetic high-resistance material; and an amorphous magnetic metallic film deposited, through an oxide layer, on one face of at least either one of said first core portion and said second core portion, which abuts on said first face, said amorphous magnetic metallic film having a thickness equal to a track width.

Claim 16

A magnetic head including at least a core for constituting a magnetic circuit, and a magnetic gap formed in said core, said core being composed of: a first core portion and a second core portion in one unit so that said first core portion and said second core portion confront each other through said magnetic gap therebetween; at least either one of said first core portion and said second core portion being formed with a first face which is brought into contact with a magnetic recording medium; a portion including said first face of at least either one of said first core portion and said second core portion being made of a non-magnetic high-resistance material; and an amorphous magnetic metallic film deposited, through an oxide layer, on one face of at least either one of said first core portion and said second core portion, which abuts on said first face, said amorphous magnetic metallic film having a thickness equal to a track width.

Claim 17

A magnetic head as claimed in claim 13, wherein the concentration of oxygen at a point in said oxide layer increases as said point is moved away from said amorphous magnetic metallic film.

Claim 18

A magnetic head as claimed in claim 13, wherein said amorphous magnetic metallic film includes at least one element selected from iron family elements consisting of iron, nickel and cobalt, while said oxide layer is composed of at least one oxide selected from iron family elements consisting of iron, nickel and cobalt.

Claim 19

A magnetic head as claimed in claim 15, wherein the concentration of oxygen at a point in said oxide layer increases as said point is moved away from said amorphous magnetic metallic film.

Claim 20

A magnetic head as claimed in claim 13, wherein said amorphous magnetic metallic film is made of at least one element selected from the group consisting of iron family elements composed of iron, nickel and cobalt, semi-metals, group IVa elements and group Va elements, while said oxide layer is composed of at least one oxide selected from iron family elements consisting of iron, nickel and cobalt.

Claim 21

A magnetic head as claimed in claim 17, wherein the concentration of oxygen at a point in said oxide layer increases as said point is moved away from said amorphous magnetic metallic film.

Claim 22

A magnetic head as claimed in claim 13, wherein either one of said first core portion and said second core portion is made of a material having high permeability and has a portion which is brought into contact with said magnetic recording medium, said portion being made of the non-magnetic high-resistance material.

Claim 23

A magnetic head including at least a core for constituting a magnetic circuit, and a magnetic gap formed in said core, said core comprising: a first core portion and a second core portion in one unit so that said first core portion and said second core portion confront each other through said magnetic gap therebetween; at least either one of said first core portion and said second core portion being formed with a first face which is brought into contact with a magnetic recording medium; a portion including said first face of at least either one of said first core portion and said second core portion being made of a non-magnetic high-resistance material; and a plurality of insulating layers and amorphous magnetic metallic films being alternately deposited as a laminate of layers on one face of at least either one of said first core portion and said second core portion, which abuts on said first face, said laminate having a thickness equal to a track width.

Claim 24

A magnetic head including at least a core for constituting a magnetic circuit, and a magnetic gap formed in said core, said core comprising: a first core portion and a second core portion in one unit so that said first core portion and said second core portion confront each other through said magnetic gap therebetween; at least either one of said first core portion and said second core portion being formed with a first face which is brought into contact with a magnetic recording medium; a portion including said first face of at least either one of said first core portion and said second core portion being made of a non-magnetic high-resistance material; and a plurality of insulating layers and amorphous magnetic metallic films being alternately deposited as a laminate of layers on one face of at least either one of said first core portion and said second core portion, which abuts on said first face, said laminate having a thickness equal to a track width.

Claim 25

A magnetic head as claimed in claim 20, wherein each said amorphous magnetic metallic film includes at least one element selected from iron family elements consisting of iron, nickel and cobalt.

Claim 26

A magnetic head as claimed in claim 20, wherein each said amorphous magnetic metallic film is made of at least one element selected from the group consisting of iron family elements composed of iron, nickel and cobalt, semi-metals, group IVa elements and group Va elements.

Claim 27

A magnetic head including at least a core for constituting a magnetic circuit, and a magnetic gap formed in said core, said core comprising: a first core portion and a second core portion in one unit so that said first core portion and said second core portion confront each other through said magnetic gap therebetween; either one of said first core portion and said second core portion comprising an amorphous magnetic metallic film deposited on a non-magnetic high-resistance substrate, said amorphous magnetic metallic film having a thickness equal to a track width; and one end face of said non-magnetic high-resistance substrate and said amorphous magnetic metallic film being brought into contact with a magnetic recording medium.

Claim 28

A magnetic head including at least a core for constituting a magnetic circuit, and a magnetic gap formed in said core, said core comprising: a first core portion and a second core portion in one unit so that said first core portion and said second core portion confront each other through said magnetic gap therebetween; either one of said first core portion and said second core portion comprising an amorphous magnetic metallic film deposited on a non-magnetic high-resistance substrate, said amorphous magnetic metallic film having a thickness equal to a track width; and one end face of said non-magnetic high-resistance substrate and said amorphous magnetic metallic film being brought into contact with a magnetic recording medium.

Claim 29

A magnetic head as claimed in claim 23, wherein said non-magnetic high-resistance substrate is of essentially insulative property.