Browse Prior Art Database

R/W Element Redundancy With Small Sliders

IP.com Disclosure Number: IPCOM000037439D
Original Publication Date: 1989-Jan-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Erpelding, AD: AUTHOR [+3]

Abstract

A magnetic head slider is described which has redundant read and write elements, and the electrical connections for the elements are connected to common terminals so that one of the read and write elements can be selected for use by cutting the electrical leads to the non-selected elements.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

R/W Element Redundancy With Small Sliders

A magnetic head slider is described which has redundant read and write elements, and the electrical connections for the elements are connected to common terminals so that one of the read and write elements can be selected for use by cutting the electrical leads to the non-selected elements.

The slider 1 comprises side rails 2 and 3 each of which has a read element 4 and a write element 5 formed at its trailing end. The inductive write elements 5 are connected by means of conductors 6 and 7 to probe pads 8 and 9 to facilitate testing during fabrication. The read elements 4, such as a magnetoresistive (MR) element, are connected by means of conductors 10 and 11 to probe pads 12 and
13. The inductive head 5 layer is insulated from the MR layer 4. Windows are provided in the insulation layer so that all of the probe pads are accessible.

The read and write elements are tested at the wafer level, and unwanted elements are removed by cutting the electrical leads at either the dashed line 14 or the dashed line 15 by either laser cutting or burning them out with a current overload from the test probe.

This design permits the use of redundant elements with only four termination studs, provides a means for testing read/write elements at the wafer level and culling out unwanted elements, and reduces manufacturing costs by increasing processing yields.

(Image Omitted)

Disclosed anonymously.

1