Browse Prior Art Database

MINIMIZATION OF S2 SHIELD SHORTS

IP.com Disclosure Number: IPCOM000014122D
Original Publication Date: 1999-Dec-01
Included in the Prior Art Database: 2003-Jun-19
Document File: 1 page(s) / 34K

Publishing Venue

IBM

Related People

HS GILL: AUTHOR [+2]

Abstract

Rapid increases in disk storage areal density are demanding significant reduction in shield-to-shield separation to achieve acceptable bit resolution for high linear bit density. To maintain acceptable signal to noise ratio for magnetoresistive heads, it is necessary to keep total lead resistance of the head low. Without any lead material changes, the lead thickness is not scaling down with gap thickness. The large lead steps at the track edges would not be fully covered by very thin insulation 500 A) between the shield and the leads.

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

Page 1 of 1

MINIMIZATION OF S2 SHIELD SHORTS

     Rapid increases in disk storage areal density are demanding significant reduction in shield-to-shield separation to achieve acceptable bit resolution for high linear bit density. To maintain acceptable signal to noise ratio for magnetoresistive heads, it is necessary to keep total lead resistance of the head low. Without any lead material changes, the lead thickness is not scaling down with gap thickness. The large lead steps at the track edges would not be fully covered by very thin insulation ( < 500 A) between the shield and the leads.

     We disclose the use of full lead thickness at some distance (about 5 um) from the track egde and thinner lead near the track edge region as shown in the figure. This approach reduces the step height in proportional to the number of thickness steps used. For only one step change in thickness, the step height is reduced to half. The reduction of step height allows complete step coverage with the thinner insulation layer between the lead and the shield and therefore helps to minimize the electrical shorts between the leads and the top shield.

1