International Business Machines Corporation

Gerald Steving

Vincent N Kahwaty

Edward V Denison

Joseph Adam Aboaf

Robert P Zammit

Gustave Christian Stern

Bradford Clyde Schwartz

Ralph D Silkensen

Davis S Fields, Jr

Gerald A Daughenbaugh

Jeffrey Allen Carlson

Roger D Bassett

Rhodes W Polleys

Wayne McCormick

An interleaved bi-directional magnetic tape head for contact recording can have a poletip enhanced by providing a thin film of a soft magnetic material deposited onto a magnetic ferrite substrate. The second pole piece is a thin film of the soft magnetic material. A closure block of a non-magnetic ceramic encloses the layers together with leveling insulation layers and a deposited activating conductor turns. The stripe poletip deposited onto the magnetic ferrite extends for a distance just short of the first conductor turn and provides a balancing of the saturation moment of the pole pieces and provides for better recording capability, especially when operating in a trailing magnetic ferrite mode.

Magnetic head with magnetic substrate and an enhanced poletip thereon

An interleaved head for reading and writing data transitions onto a magnetic tape. A magnetic recording system for the bi-directional transportation of the tape media across the interleaved head. A controller controls the tape drive in a reel-to-reel format to accomplish the bi-directional motion of the tape media. The interleaved head includes two modules with each module having a plurality of alternating read and write transducers alternately spaced apart along a single line placed transverse to the movement of the magnetic tape. The two modules are placed together such that the write gaps of one module are aligned with the read gaps of the other module. Each read module includes the magneto-resistive element. Each write transducer includes a thin film conductor driving a nickel zinc ferrite substrate as one pole piece and a nickel zinc closure piece as the second pole piece. In order to provide leveling across the write transducers of the module, write back gap islands are provided in the back gap regions of the write transducer made of the same material with the same thickness as the magneto resistive element and the conductors interconnecting the magneto resistive element to the read/write network of the tape drive.

Magnetic hybrid interleaved head with closure supporting islands

Method of making a magnetic hybrid interleaved head

An interleaved bi-directional magentic tape head for contact recording can have a poletip enhanced by providing a thin film of a soft magnetic material deposited onto a magnetic ferrite substrate. The second pole piece is a thin film of the soft magnetic material. A closure block of a non-magnetic ceramic encloses the layers together with leveling insulation layers and a deposited activating conductor turns. The stripe poletip deposited onto the magnetic ferrite extends for a distance just short of the first conductor turn and provides a balancing of the saturation moment of the pole pieces and provides for better recording capability, especially when operating in a trailing magnetic ferrite mode.

Method for making magnetic head with enhanced poletip

An MR head is disclosed in which the MR element is deposited onto a sapphire substrate with a particular crystallographic orientation and a sapphire closure piece also having a particular crystallographic orientation is used. The substrate has the MR element deposited onto either the {0001} or the {1120} plane with the {1100} plane being oriented as the wear surface. The closure piece has either the {1120} or the {0001} plane facing the MR material and the {1100} plane oriented as the wear surface.

Wear resistant magnetorestrictive head

A method of bonding two crystals together is disclosed. A bond enhancing material such as chromium (Cr) is vapor deposited on one crystal, and on this is vapor deposited a noble metal such as gold (Au). On the other crystal a low melting point metal such as tin (Sn) or indium (In) is vapor deposited. In the case of In this can either be directly on the crystal or on a layer of bond enhancing material; in the case of Sn this must be on a bond enhancing material. On top of the low melting point metal a layer of the same noble metal is deposited to prevent oxidation thereof. The noble metal layers are brought into contact with each other in vacuum or inert atmosphere and pressure applied thereto at a temperature of 100.degree. C to 150.degree. C in the case of In and 100.degree. C to 200.degree. C in the case of Sn. The low melting point metal will diffuse into the noble metals and across the interface causing a bond to form by elimination of the boundary between the crystals.

Diffusion bonding of crystals

An insulating film substantially free from surface irregularities is RF bias sputtered onto a smooth polycrystalline or micro-roughened surface. Controlled sputtering is performed first at a low reemission coefficient and then, after a substantially continuous layer of insulative amorphous film is deposited over the substrate, increasing the reemission coefficient to a second higher level. A low reemission coefficient is about 0.25 and a high coefficient is about 0.7.

Growing community of inventors

Tucson, AZ, United States of America

Gerald Steving