Patent · US Active

Write head with variable side shield gaps

US8400731B1 · kind B1 · utility

168Cited by

10References

13Claims

0Family size

Assignee

WESTERN DIGITAL (FREMONT), LLC · US

Inventors

Shaoping Li · Naperville, US
Ge Yi · Pleasanton, US
Feng Liu · San Ramon, US

Key dates

Filing date	Apr 19, 2009
Grant date	Mar 19, 2013
Priority date	—
Expiry date	Oct 17, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49039
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A magnetic recording head comprises a write pole including a throat region with a leading edge, a trailing edge opposite the leading edge, and first and second side edges opposite one another. The magnetic recording head further comprises a first side wall gap layer disposed alongside the first side edge of the throat region, and a second side wall gap layer disposed alongside the second side edge of the throat region. Each of the first and second side wall gap layers has a first width at the leading edge of the throat region smaller than a second width at the trailing edge of the throat region.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.