Microminimonolithic magnetic head slider

Claim 2

A microminimonolithic slider adapted for use with a magnetic head flying on an air cushion over a moving magnetic media for recording and reproducing tracks of information, said slider comprising means for defining an aerodynamic surface having a pair of spaced, parallel load rails which are adapted to fly over the moving magnetic media, said aerodynamic surface defining means further including means for defining an air bearing surface formed on each of said load rails having a width in a direction substantially normal to and which is greater than the track width of information on a magnetic media; means for defining on the aerodynamic surface, and between said pair of spaced, parallel load rails, a central rail having an apex which defines an air bearing surface having a width in a direction substantially normal to the tracks of information on a magnetic media and which is less than the width of the air bearing surface on each of said load rails; means for defining a trailing edge located rearward of said aerodynamic surface and for defining through the trailing edge a transverse slot which is spaced from and extends substantially perpendicular to said pair of spaced, parallel load rails and said central rail, said transverse slot including means for defining a magnetic pole piece contiguous the central rail and the air bearing surface formed on the apex thereof; and means for defining in the trailing edge of said slider and through at least the transverse slot a pair of spaced, parallel, vertically extending slots which are substantially normal to said transverse slot, said vertically extending slots being positioned with said central rail located therebetween.

Claim 3

The microminimonolithic magnetic head slider of claim 1 wherein said means for defining said trailing edge includes an upper edge and a lower edge which defines said transverse slot therebetween and wherein said pair of spaced, parallel, vertical slots extend through said upper edge, said lower edge and said transverse slot.

Claim 4

The microminimonolithic magnetic head slider of claim 2 wherein said slider includes a top outer surface which is substantially parallel to and spaced from the aerodynamic surface and wherein said trailing edge is located between said top outer surface and said aerodynamic surface and wherein said pair of spaced, parallel, vertical slots extend beyond said upper edge and intersect with said top outer surface and extend beyond said lower edge and intersect with said aerodynamic surface.

Claim 5

The microminimonolithic slider of claim 2 wherein each of said load rails is located on an edge of said slider.

Claim 6

The microminimonolithic slider of claim 2 wherein each side of said load rails has chamfered edges.

Claim 7

The microminimonolithic slider of claim 2 wherein said slider is formed of manganese-zinc ferrite.

Claim 8

The microminimonolithic magnetic head slider of claim 2 wherein said pair of spaced, parallel, vertical slots extend beyond said lower edge towards said aerodynamic surface.

Claim 9

The microminimonolithic magnetic head slider of claim 7 wherein said pair of spaced, parallel, vertical slots extend beyond said lower edge and intersect said aerodynamic surface.

Claim 10

A microminimonolithic magnetic head slider adapted for use with a magnetic head flying on an air cushion over a moving magnetic media for recording and reproducing tracks of information, said slider having an aerodynamic surface that is adapted to be positioned adjacent the moving magnetic media during operation wherein the slider includes a leading edge located forward of the aerodynamic surface and adapted to interact with a magnetic media moving in a direction towards said slider and a trailing edge located rearward of the aerodynamic surface, said slider comprising means for defining on the aerodynamic surface of a pair of spaced, parallel load rails which are adapted to fly over the moving magnetic media, said load rails defining means for defining an air bearing surface formed on each of said load rails having a width in a direction substantially normal to and which is greater than the track width of information on a magnetic media and wherein each of said load rails terminates at one end thereof in a leading edge ramp and at the other end thereof in a trailing edge ramp; means for defining on the aerodynamic surface, and between said pair of spaced, parallel load rails, a wedged-shaped central rail having an apex which defines an air bearing surface having a width in a direction substantially normal to the tracks of information on a magnetic media which is less than the width of the air bearing surface on each of said load rails; means for defining through the trailing edge of said slider and through the trailing edge ramp an upper edge and a lower edge which defines therebetween a transverse slot which is spaced from and extends substantially perpendicular to said pair of spaced, parallel load rails and said central rail, said transverse slot including means for defining a magnetic pole piece contiguous the wedge-shaped central rail and the air bearing surface formed on the apex thereof; and means for defining in the trailing edge of said slider and through the transverse slot a pair of spaced, parallel, vertically extending slots which are substantially normal to said transverse slot, said vertically extending slots being positioned with said central rail located therebetween.

Claim 11

A microminimonolithic magnetic head slider adapted for use with a magnetic head flying on an air cushion over a moving magnetic media for recording and reproducing tracks of information, said slider having an aerodynamic surface that is adapted to be positioned adjacent the moving magnetic media during operation wherein the slider includes a leading edge located forward of the aerodynamic surface and adapted to interact with a magnetic media moving in a direction towards said slider and a trailing edge located rearward of the aerodynamic surface, said slider comprising means for defining on the aerodynamic surface of a pair of spaced, parallel load rails which are adapted to fly over the moving magnetic media, said load rails defining means for defining an air bearing surface formed on each of said load rails having a width in a direction substantially normal to and which is greater than the track width of information on a magnetic media and wherein each of said load rails terminates at one end thereof in a leading edge ramp and at the other end thereof in a trailing edge ramp; means for defining on the aerodynamic surface, and between said pair of spaced, parallel load rails, a wedged-shaped central rail having an apex which defines an air bearing surface having a width in a direction substantially normal to the tracks of information on a magnetic media which is less than the width of the air bearing surface on each of said load rails; means for defining through the trailing edge of said slider and through the trailing edge ramp an upper edge and a lower edge which defines therebetween a transverse slot which is spaced from and extends substantially perpendicular to said pair of spaced, parallel load rails and said central rail, said transverse slot including means for defining a magnetic pole piece contiguous the wedge-shaped central rail and the air bearing surface formed on the apex thereof; and means for defining in the trailing edge of said slider and through the transverse slot a pair of spaced, parallel, vertically extending slots which are substantially normal to said transverse slot, said vertically extending slots being positioned with said central rail located therebetween.

Claim 12

The microminimonolithic magnetic head slider of claim 9 wherein a pair of spaced, parallel, vertically extending slots extend through said lower edge and intersect with said aerodynamic surface.

Claim 13

The microminimonolithic magnetic head slider of claim 9 wherein the height of said magnetic slider extending in a direction substantially normal to the air bearing surface located on said load rails is approximately 0.034 inches.

Claim 14

The microminimonolithic magnetic head slider of claim 9 wherein the width in a direction substantially normal to the tracks of information on the magnetic media of the air bearing surface on each load rail is selected to have a width in the range of about 0.014 inches to about 0.028 inches.

Claim 15

The microminimonolithic magnetic head slider of claim 12 wherein the width in a direction substantially normal to the tracks of information on the magnetic media of the air bearing surface on each of the load rails is selected to be approximately 0.022 inches.

Claim 16

The microminimonolithic magnetic head slider of claim 9 wherein the width of the air bearing surface of the central rail is selected to have a width in a direction substantially normal to the tracks of information on the magnetic media in the range of about 0.00035 inches to about 0.00090 inches.

Claim 17

The microminimonolithic magnetic head slider of claim 14 wherein the width in a direction substantially normal to the tracks of information on the magnetic media of the air bearing surface of the central rail is selected to be approximately 0.00075 inches.

Claim 18

The microminimonolithic magnetic head slider of claim 15 wherein the gap length in a direction substantially parallel to the tracks of information on a magnetic media is selected in the range of about 20 microinches to about 40 microinches.

Claim 19

The microminimonolithic magnetic head slider of claim 16 wherein the gap length in a direction substantially parallel to the tracks of information on a magnetic media is selected to be approximately 25 microinches.

Claim 20

The microminimonolithic magnetic head slider of claim 9 wherein each of said load rails is located on an edge of said slider and extend in a direction substantially tangent to the tracks of information on a rotating magnetic media.

Claim 21

The microminimonolithic magnetic head slider of claim 18 wherein said slider is formed of a manganese-zinc ferrite.

Claim 22

The microminimonolithic magnetic head slider of claim 18 wherein each edge of said load rails has chamfered edges which extend between the leading edge ramp and trailing edge ramp.

Claim 23

The microminimonolithic magnetic head slider of claim 20 wherein the angle of the chamfered edge is approximately 45°.

Claim 24

The microminimonolithic magnetic head slider of claim 9 wherein the magnetic pole piece defined in the transverse slot is formed to be at an angle of approximately 45° to the air bearing surface of the central rail.

Claim 25

The microminimonolithic magnetic head slider of claim 22 further comprising a "C" shaped core of magnetic material having an upper end and a lower end having an opposed outer edge with the upper end thereof formed into a planar magnetic closure portion and with the lower end thereof formed into a magnetic pole piece, said "C" shaped core being positioned with the upper end thereof contiguous the upper edge defining the transverse slot to form a closed magnetic path therebetween and with the lower end thereof spaced a predetermined distance from the magnetic pole piece formed in the lower edge defining the transverse slot defined in the trailing ramp edge forming a magnetic gap between the magnetic pole pieces.

Claim 26

The microminimonolithic magnetic head slider of claim 23 wherein the magnetic pole formed on the lower end of the "C" shaped core, which is adapted to be positioned adjacent to the moving media, has an acute angle located in the opposed outer edge of the lower end and extending in a direction away from said slider formed therein.

Claim 27

The microminimonolithic magnetic head slider of claim 23 wherein the gap has a high saturation flux density metal located in the gap.

Claim 28

The microminimonolithic magnetic head slider of claim 25 wherein the high saturation flux density metal is alphasil.

Claim 29

The microminimonolithic magnetic head slider of clai 25 m wherein the high saturation flux density metal is sendust.

Claim 30

The microminimonolithic magnetic head slider of clai 25 m wherein the high saturation flux density metal is sendust.

Claim 31

A microminimonolithic magnetic slider that is adapted to be positioned adjacent a moving magnetic media during operation, said slider comprising means for defining an aerodynamic surface having a pair of spaced, parallel load rails each having an air bearing surface formed on each of said load rails of a predetermined width in a direction substantially normal to the moving magnetic media and which are adapted to fly over a moving magnetic media, said aerodynamic surface defining means including means for defining a leading edge and a trailing edge; means for defining on the aerodynamic surface and between said pair of spaced, parallel load rails a wedged-shaped central rail having an air bearing surface formed on the central rail at the apex of the central rail in a direction substantially normal to the moving magnetic media means for defining through the trailing edge of said slider and spaced from said aerodynamic surface an upper edge and a lower edge which defines therebetween a transvers slot which extends substantially perpendicular to said pair of spaced, parallel load rails and said central rail and a pair of spaced, parallel vertically extending slots which extend substantially perpendicular to said transverse slot, said transverse slot defining means, including means for defining a magnetic pole piece contiguous the wedged-shaped central rail and the air bearing surface formed on the apex thereof; and means for defining in the trailing edge of said slider and through the upper edge, lower edge and transverse slot a pair of spaced, parallel, vertically extending slots which are substantially normal to said transverse slot, said vertically extending slots being positioned with said central rail located therebetween.

Claim 32

A microminimonolithic magnetic slider that is adapted to be positioned adjacent a moving magnetic media during operation, said slider comprising means for defining an aerodynamic surface having a pair of spaced, parallel load rails each having an air bearing surface formed on each of said load rails of a predetermined width in a direction substantially normal to the moving magnetic media and which are adapted to fly over a moving magnetic media, said aerodynamic surface defining means including means for defining a leading edge and a trailing edge; means for defining on the aerodynamic surface and between said pair of spaced, parallel load rails a wedged-shaped central rail having an air bearing surface formed on the central rail at the apex of the central rail in a direction substantially normal to the moving magnetic media means for defining through the trailing edge of said slider and spaced from said aerodynamic surface an upper edge and a lower edge which defines therebetween a transvers slot which extends substantially perpendicular to said pair of spaced, parallel load rails and said central rail and a pair of spaced, parallel vertically extending slots which extend substantially perpendicular to said transverse slot, said transverse slot defining means, including means for defining a magnetic pole piece contiguous the wedged-shaped central rail and the air bearing surface formed on the apex thereof; and means for defining in the trailing edge of said slider and through the upper edge, lower edge and transverse slot a pair of spaced, parallel, vertically extending slots which are substantially normal to said transverse slot, said vertically extending slots being positioned with said central rail located therebetween.

Claim 33

A microminimonolithic magnetic head slider assembly that is adapted to be positioned adjacent to a moving magnetic media during operation, said slider assembly comprising means for defining an aerodynamic surface having a pair of space, parallel load rails each having an air bearing surface formed on each of said load rails of a predetermined width in a direction substantially normal to the moving magnetic media and which are adapted to fly over a moving magnetic media, said aerodynamic surface defining means including means for defining a leading edge and a trailing edge; means for defining on the aerodynamic surface and between said pair of spaced, parallel load rails on a wedged-shaped central rail having an air bearing surface formed on the central rail at the apex of the central rail; means for defining through the trailing edge of said slider and spaced from said aerodynamic surface an upper outer edge and a lower outer edge which defines therebetween a tranverse slot and means for defining in the lower outer edge a magnetic pole piece contiguous the wedge-shaped central rail and the air bearing surface formed on the apex thereof; a "C" shaped core of magnetic material having an upper end and a lower end having an opposed outer edge with the upper end thereof formed into a planar magnetic closure portion and with the lower end thereof formed into a magnetic pole piece having at an acute angle located in the opposed outer edge of the lower end and extending in a direction away from said slider, said "C" shaped core being positioned with the upper end thereof contiguous the upper outer edge defining the transverse slot to form a closed magnetic path therebetween and with the lower end thereof spaced a predetermined distance from the magnetic pole piece formed in the lower edge defining the transverse slot defined in the trailing ramp edge forming a magnetic gap between the magnetic pole pieces; and means for defining in the trailing edge of said slider and through the upper outer edge, lower outer edge and transverse slot a pair of spaced, parallel, vertically extending slots which are substantially normal to said transverse slot and which extend adjacent said "C" shape core, said vertically extending slots being positioned with said central rail located therebetween.

Claim 34

A microminimonolithic magnetic head slider assembly that is adapted to be positioned adjacent to a moving magnetic media during operation, said slider assembly comprising means for defining an aerodynamic surface having a pair of space, parallel load rails each having an air bearing surface formed on each of said load rails of a predetermined width in a direction substantially normal to the moving magnetic media and which are adapted to fly over a moving magnetic media, said aerodynamic surface defining means including means for defining a leading edge and a trailing edge; means for defining on the aerodynamic surface and between said pair of spaced, parallel load rails on a wedged-shaped central rail having an air bearing surface formed on the central rail at the apex of the central rail; means for defining through the trailing edge of said slider and spaced from said aerodynamic surface an upper outer edge and a lower outer edge which defines therebetween a tranverse slot and means for defining in the lower outer edge a magnetic pole piece contiguous the wedge-shaped central rail and the air bearing surface formed on the apex thereof; a "C" shaped core of magnetic material having an upper end and a lower end having an opposed outer edge with the upper end thereof formed into a planar magnetic closure portion and with the lower end thereof formed into a magnetic pole piece having at an acute angle located in the opposed outer edge of the lower end and extending in a direction away from said slider, said "C" shaped core being positioned with the upper end thereof contiguous the upper outer edge defining the transverse slot to form a closed magnetic path therebetween and with the lower end thereof spaced a predetermined distance from the magnetic pole piece formed in the lower edge defining the transverse slot defined in the trailing ramp edge forming a magnetic gap between the magnetic pole pieces; and means for defining in the trailing edge of said slider and through the upper outer edge, lower outer edge and transverse slot a pair of spaced, parallel, vertically extending slots which are substantially normal to said transverse slot and which extend adjacent said "C" shape core, said vertically extending slots being positioned with said central rail located therebetween.

Claim 35

The microminimonolithic head slider assembly of claim 29 wherein a coil is wound around the "C" shaped core.

Claim 36

The microminimonolithic magnetic head slider assembly of claim 29 wherein each of said load rails has chamfered edges which extend between the leading ramp edge and trailing ramp edge.

Claim 37

The microminimonolithic magnetic head slider assembly of claim 31, wherein the angle of the chamfered edges is approximately 45°.

Claim 38

The microminimonolithic magnetic head slider of claim 29 wherein the means for defining said tranverse slot includes means for defining the magnetic pole piece of the tranverse slot at a selected angle from the air bearing surface of the central rail towards the slider wherein said selected angle is a portion of a total apex angle defined between the two magnetic pole pieces.

Claim 39

The microminimonolithic magnetic head slider of claim 33 wherein the lower end of the "C" shaped core includes means for defining the magnetic pole piece at an angle formed in an edge opposite the opposed outer edge and towards the slider which is the difference between the selected angle and the total apex angle.

Claim 40

The microminimonolithic magnetic head slider of claim 34 wherein the total apex angle is selected to be an angel in a range of about 30° to about 120°.

Claim 41

The microminimonolithic magnetic head slider of claim 35 wherein the total apex angle is selected to be approximately 90°.

Claim 42

The microminimonolithic magnetic head slider assembly of claim 27 wherein each of said load rails is located on an edge of said slider and extend in a direction substantially tangent to tracks of information on a rotating magnetic media.

Claim 43

The microminimonolithic magnetic head slider assembly claim 37 wherein said slider is formed of a manganese-zinc ferrite.

Claim 44

The microminimonolithic magnetic head slider assembly of claim 37 wherein the height of the magnetic slider extending in a direction substantially normal to the air bearing surface located on said load rails is approximately 0.034 inches.

Claim 45

The microminimonolithic magnetic head slider assembly of claim 37 wherein the width in a direction substantially normal to the tracks of information on the magnetic media of the air bearing surface of the central rail is approximately 0.022 inches.

Claim 46

The microminimonolithic magnetic head slider assembly of claim 37 wherein the width in a direction substantially normal to the tracks of information on the magnetic media of the air bearing surface of the central rail is approximately 0.00075 inches.

Claim 47

The microminimonolithic magnetic head slider assembly of claim 37 wherein the magnetic pole piece contiguous the wedge-shaped central rail is formed to be at an angle of approximately 45° to the air bearing surface of the central rail.

Claim 48

In combination, a flexure arm having a support end and a head slider loading end; a microminimonolithic head slider assembly operatively attached to said head slider loading end of said flexure arm, said microminimonolithic head slider assembly comprising means for defining an aerodynamic surface having a pair of spaced, parallel load rails each having an air bearing surface formed on each of said load rails to a predetermined width in a direction substantially normal to tracks of information on the magnetic media and which air bearing surfaces are adapted to fly over a moving magnetic media, said aerodynamic surface defining means including means for defining a leading edge and a trail edge; means for defining on the aerodynamic surface and between said pair of spaced, parallel load rails a wedged-shaped central rail having an air bearing surface formed on the central rail at the apex of the central rail having a width in a direction substantially normal to the moving magnetic media which is less than the predetermined width; means for defining through the trailing edge of said slider and spaced from said aerodynamic surface an upper edge and a lower edge which defines therebetween a transverse slot which extends substantially perpendicular to said pair of spaced, parallel load rails and said central rail, said transverse slot defining means, including means for defining a magnetic pole piece contiguous the wedged-shaped central rail and the air bearing surface formed on the apex thereof; and means for defining in the trailing edge of said slider and through the upper edge, lower edge and transverse slot a pair of spaced, parallel, vertically extending slots which are substantially normal to said transverse slot, said vertically extending slots being positioned with said central rail located therebetween.

Claim 49

In combination, a flexure arm having a support end and a head slider loading end; a microminimonolithic head slider assembly operatively attached to said head slider loading end of said flexure arm, said microminimonolithic head slider assembly comprising means for defining an aerodynamic surface having a pair of spaced, parallel load rails each having an air bearing surface formed on each of said load rails to a predetermined width in a direction substantially normal to tracks of information on the magnetic media and which air bearing surfaces are adapted to fly over a moving magnetic media, said aerodynamic surface defining means including means for defining a leading edge and a trail edge; means for defining on the aerodynamic surface and between said pair of spaced, parallel load rails a wedged-shaped central rail having an air bearing surface formed on the central rail at the apex of the central rail having a width in a direction substantially normal to the moving magnetic media which is less than the predetermined width; means for defining through the trailing edge of said slider and spaced from said aerodynamic surface an upper edge and a lower edge which defines therebetween a transverse slot which extends substantially perpendicular to said pair of spaced, parallel load rails and said central rail, said transverse slot defining means, including means for defining a magnetic pole piece contiguous the wedged-shaped central rail and the air bearing surface formed on the apex thereof; and means for defining in the trailing edge of said slider and through the upper edge, lower edge and transverse slot a pair of spaced, parallel, vertically extending slots which are substantially normal to said transverse slot, said vertically extending slots being positioned with said central rail located therebetween.

Claim 50

The combination of claim 43 further comprising a "C" shaped magnetic core of magnetic material having one end thereof formed into a planar magnetic closure portion and with the end thereof formed into a magnetic pole piece, said "C" shaped core being positioned with the one end thereof contiguous that portion of the transverse slot removed from the magnetic pole piece to form a closed magnetic path therebetween and with the other end thereof spaced a predetermined distance from the magnetic pole piece formed in the transverse slot forming a magnetic gap between the magnetic pole pieces.

Claim 51

The combination of claim 43 wherein said microminimonolithic head slider is formed of a manganese-zinc ferrite.

Claim 52

The combination of claim 43 wherein a coil is wound around said "C" shaped core of magnetic material.

Claim 53

The combination of claim 46 wherein the coil has about 19 bifilar windings.