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Alignment of Read Write Heads in Sliders

IP.com Disclosure Number: IPCOM000090608D
Original Publication Date: 1969-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Landler, PF: AUTHOR

Abstract

The requirements of more and more reduced flying heights of read-write heads over the appropriate record media admits correspondingly reduced tolerances only when inserting the read-write head into the slider. In the lapping process of the slider with a read-write head, built-in poorly adjusted read-write heads can decline from the admissible tolerance with regard to the height above the record media. This disadvantage is avoided by applying the following measures.

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Alignment of Read Write Heads in Sliders

The requirements of more and more reduced flying heights of read-write heads over the appropriate record media admits correspondingly reduced tolerances only when inserting the read-write head into the slider. In the lapping process of the slider with a read-write head, built-in poorly adjusted read-write heads can decline from the admissible tolerance with regard to the height above the record media. This disadvantage is avoided by applying the following measures.

Read-write head 2 is inserted and fixed by epoxy 3 in slider 1 which is moveable over a record media in a direction perpendicular to the drawing plane. Head 2 consists of substrate 8 carrying copper conductor 5 sandwiched between Y-shaped joined permalloy pieces 4 in the region of the read-write gap. Further conductors 6 are fixed on substrate 8 and connected at each end of test conductor 7 passing just under the read-write gap along the lower edge of substrate 8 before its processing for alignment. The width of conductor 7 between the read-write gap and the lower edge of substrate 8 is very small. Read-write head 2 is mounted into slider 1 with tolerance t, the value of which depends upon a reasonable duration of the lapping process. During the lapping process of the lower edge of substrate 8, the resistance of conductor 7 is recorded continuously by connecting measuring devices to conductors 6.

When conductor 7 is abraded so that either electric conduction is...