Eric Richard Katz

US Patent:

57644519, Jun 9, 1998

Filed:

Nov 4, 1997

Appl. No.:

8/963817

Inventors:

Eric R. Katz - San Jose CA

Assignee:

Read-Rite Corporation - Milpitas CA

International Classification:

G11B 502
G11B 517

US Classification:

360123

Abstract:

A magnetic head includes an inductive coil electrically partitioned into a plurality of segments by a plurality of conductive leads. During the data reading mode, magnetic flux changes emanating from a record medium are sensed by the magnetic head. The inductive coil transduces the magnetic flux changes into electrical signals at the conductive leads. The signals are amplified by serially cascading the plurality of segments and the signals are then fed into amplifiers. During the data writing mode, the electrical signal is applied to two of the conductive leads via a data writing amplifier. The inductive coil converts the electrical signal into changes in magnetic flux for recording onto a magnetic medium.

US Patent:

62049984, Mar 20, 2001

Filed:

Mar 23, 1998

Appl. No.:

9/583104

Inventors:

Eric R. Katz - San Jose CA

Assignee:

Read-Rite Corporation - Milpitas CA

International Classification:

G11B 502
G11B 517

US Classification:

360123

Abstract:

A magnetic head includes an inductive coil electrically partitioned into a plurality of segments by a plurality of conductive leads. During the data reading mode, magnetic flux changes emanating from a record medium are sensed by the magnetic head. The inductive coil transduces the magnetic flux changes into electrical signals at the conductive leads. The signals are amplified by serially cascading the plurality of segments and the signals are then fed into amplifiers. During the data writing mode, the electrical signal is applied to two of the conductive leads via a data writing amplifier. The inductive coil converts the electrical signal into changes in magnetic flux for recording onto a magnetic medium.

US Patent:

44582790, Jul 3, 1984

Filed:

Mar 23, 1981

Appl. No.:

6/246748

Inventors:

Eric R. Katz - San Jose CA

Assignee:

Magnex Corporation - San Jose CA

International Classification:

G11B 520
G11B 512
G11B 522
G11B 527

US Classification:

360123

Abstract:

Optically or visually perceptible lapping and grinding patterns are provided in a thin film transducer structure by depositing conductive material both between the magnetic pole pieces and, external to such pole pieces. The conductive material between the pole pieces is so positioned as to determine the zero throat point of the transducer and is in predetermined aligned relationship with the external pattern by, for example, being formed during a single masking step.

US Patent:

60439599, Mar 28, 2000

Filed:

Mar 23, 1998

Appl. No.:

9/046796

Inventors:

Billy Wayne Crue - San Jose CA
Mark D. Thomas - Hollister CA
Eric Katz - San Jose CA
William Jensen - Fremont CA

Assignee:

Read-Rite Corporation - Milpitas CA

International Classification:

G11B 539

US Classification:

360113

Abstract:

A magnetic head includes aligned pole tips and a coil proximally disposed between a pair of first and second magnetic yoke layers which define a closed magnetic path with a transducing gap. The second magnetic yoke layer includes a flat geometry with a substantially level cross-sectional profile. The second yoke layer with less curvature results in less mutual inductance with the coil. Furthermore, the coil can be closely positioned between the first and second yoke layer, thereby allowing the coil to be more efficient in inducing magnetic flux in the yoke layers during data writing, and allowing the intercepted flux to induce current into the coil during data reading if the magnetic head is used as an inductive head.

US Patent:

42778093, Jul 7, 1981

Filed:

Sep 26, 1979

Appl. No.:

6/078876

Inventors:

Robert D. Fisher - Cupertino CA
Eric R. Katz - San Jose CA

Assignee:

Memorex Corporation - Santa Clara CA

International Classification:

G11B 566
G11B 502

US Classification:

360131

Abstract:

Apparatus is disclosed for recording magnetic impulses on a selectively magnetizable medium with such impulses being recorded with their axes of magnetization substantially perpendicular to the surface of the medium utilizing a recording medium having a high magnetic permeability backing layer and an overlying coating of magnetic material having uniaxial anisotropy substantially perpendicular to the surface of the backing layer, and using a unitary magnetic head for both recording and playback with such head positioned adjacent to one side of the recording medium.

US Patent:

57502757, May 12, 1998

Filed:

Jul 12, 1996

Appl. No.:

8/679228

Inventors:

Eric R. Katz - San Jose CA
David I. Berger - San Jose CA

Assignee:

Read-Rite Corporation - Milpitas CA

International Classification:

G11B 566

US Classification:

428694R

Abstract:

A magnetic thin film recording head includes laminated magnetic pole members, adjacent pole members being separated from each other by nonmagnetic insulating layers to reduce eddy current effects between the laminated members. The nonmagnetic insulating layers extend from the throat region of the head toward the pole tip region and terminate at a distance from the air bearing surface which is a function of the skin depth of the magnetic pole material for the particular recording frequency range being employed in the head.

US Patent:

57935777, Aug 11, 1998

Filed:

Nov 1, 1996

Appl. No.:

8/742472

Inventors:

Eric R. Katz - San Jose CA
Michael E. Devillier - San Jose CA

Assignee:

Read-Rite Corporation - Milpitas CA

International Classification:

G11B 5142

US Classification:

360126

Abstract:

A magnetic thin film head of the planar geometry type has a dielectric member located between facing ends of pole members in the gap region. The thickness of at least one of the pole members in the gap region is reduced by the dielectric member relative to the thickness of the remainder of the pole members. This dielectric member in the region of reduced thickness functions to increase the density of the magnetic flux in that region during recording, thereby improving the write capability of the head.