Eastman-kodak Company

Steven J Adamson

Neil Smith

Frederick J Jeffers

Robert O James

Frederick Rockwell Chamberlain, Iv

Bradford D West

Lee Walter

Tomasz Mark Jagielinski

Greg A Burg

Harry S Edelman

A credit and access control card and reader system comprising: a magnetically encodable card comprising a body having upper and lower surfaces and side and end edges, the body being formed of plastic material having magnetic particles uniformly dispersed throughout the plastic material; and a reader having a magneto resistive (MR) head for reading the magnetically encodable card as it is moved past the MR head.

Magnetic card and reader system

The laminate of the invention is provided with an etch stop to protect the laminate's adhesive layer. The etch stop also circumvents any etching interference due to degradation products which would arise from breakdown of the adhesive layer. The etch stop is a protective thin film in the form of a metal oxide, metal nitride, metal oxynitride, metal carbide or metal oxycarbide coating deposited on the back side of the metal sheet prior to lamination onto the substrate by means of an organic adhesive. The thin etch stop film is in the form of a blanket coating to assure adhesion to the metal surface and to the adhesive. It may be deposited onto the metal sheet by standard vacuum deposition techniques such as DC and magnetron sputtering, thermal and E-beam evaporation, chemical vapor deposition, and plasma enhanced chemical vapor deposition methods. The thin film thickness is flexible, and can range in thickness from tenths of angstroms to microns.

Laminated metal structure and metod of making same

A technique for defining the gap depth of a magnetic head utilizes side-by-side knife edges which point in generally opposite directions, and define thereby a reference gap depth. The resistance of a conductive layer beneath the structure which defines one knife edge is the analog of the gap depth.

Self aligned lapping guide for inductive record heads

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Poway, CA, United States of America

Steven J Adamson