International Business Machines Corporation

Gerald A Daughenbaugh

Gerald Steving

Eugene B Rigby

Davis S Fields, Jr

Ralph D Silkensen

Joseph E Wallace

Arthur E Moxley

Philip W Koob

Rhodes W Polleys

Roger D Bassett

Wayne McCormick

A low magnetic isolation closure glass for use in multitrack magnetic tape heads has been prepared by combining a specific lead borosilicate glass with a specific borosilicate glass in a 60/40 weight percent ratio. The glass formed from the combination exhibits compatibility with ferrite and has reduced wear. Controlling the anneal temperature regulates the residual stress of the closure glass produced, and thus, provides some control over the wear characteristics of the glass.

Method of making low wear glass for magnetic heads

A magnetoresistive head assembly comprises a silicon substrate, a magnetoresistive element mounted on the substrate, and sapphire members formed around said substrate in a sandwich type configuration. The portion of the head which interacts in transducing relation with a magnetic medium is so configured as to realize improved wear characteristics as well as good heat dissipation with low thermal noise.

Sandwich type magnetoresistive read head

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

Growing community of inventors

Tucson, AZ, United States of America

Gerald A Daughenbaugh