Thin film magnetic head
US6188543A · kind A · utility
15Cited by
1References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1998 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Apr 22, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/012
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thin film magnetic head includes a recording gap layer, and lower and upper magnetic pole layers made of polycrystalline magnetic substances, deposited to sandwich the recording gap layer. An average particle size D of crystal substances at least in a region of the upper magnetic pole layer, near the recording gap layer with respect to a recording track width W is set to D.ltoreq.W/20.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.