Magnetic transducer head structure

Details Magnetic transducer head structure Magnetic transducer head structure

G - Physics

11

B

352/29.02, 352/2

G11B 5/265 (2006.01) G11B 5/02 (2006.01) G11B 5/245 (2006.01)

Patent

CA 1284839

ABSTRACT OF THE DISCLOSURE magnetic core structure for a transducer head particularly adapted for use in digital data storage devices, comprising: magnetic core elements formed from magnetic material and defining a magnetic circuit, said circuit having at least one gap where magnetic flux in such circuit may access magnetically-recordable data storage media; moans defining a first magnetic pole structure for said circuit at one side of said gap, and means defining a second magnetic pole structure for said circuit at the other side of said gap, generally opposite said first pole structure: at least one of said magnetic pole structures having a laminar structure comprising at least one medial strata and at least one flanking strata disposed adjacent to and overlying at least portions of said medial strata to thereby define an included area of overlap at such portions said medial strata having a thickness at said gap which is loss than that of the other polo structure disposed across said gap; non-magnetic isolation means disposed between said medial strata and said flanking strata at said one pole structure, for isolating at least said portions of said medial strata from the adjacent portions of the flanking strata: said flanking strata comprising magnetic material and serving to magnetically shunt portions of said medial strata along said magnetic circuit, said flanking strata extending alongside and into magnetic communication with said medial strata at a point spaced from said one pole structure to provide a parallel magnetic return; said medial strata having an intermediate portion shunted by and separated from said flanking strata, said intermediate portion defining a core-accessing location along said magnetic path where an electromagnetic coil may be applied to the cores said medial strata extending into magnetic communication with said other magnetic pole structure at a point beyond said intermediate portion; and said included area of overlap between said medial strata and said flanking strata being limited in size to an amount which limits the transfer of magnetic flux from the flanking strata to the medial strata through the non-magnetic isolation means at said area to less than about ten percent of the total magnetic flux in said magnetic current.

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