Thin film magnetic head having partial insulating layer formed on bottom pole layer through gap layer and method of manufacturing the same
US6954333B2 · kind B2 · utility
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Key dates
| Filing date | Oct 17, 2003 |
| Grant date | Oct 11, 2005 |
| Priority date | — |
| Expiry date | Oct 17, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49064
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thin film magnetic head wherein a partial insulating layer is formed on a bottom pole layer with a gap layer provided therebetween, the gap depth Gd being regulated by the distance from a surface facing a recording medium to the partial insulating layer. A magnetic flux partially leaks from a tip region of an upper core layer to the bottom pole layer through the partial insulating layer to effectively suppress magnetic saturation of the tip region, thereby improving the NLTS characteristic and PW50 characteristic, and suppressing the occurrence of side fringing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.