Manufacturing method for magnetoresistance elements
US5618738A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1995 |
| Grant date | Apr 8, 1997 |
| Priority date | — |
| Expiry date | Mar 14, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N50/01
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a magnetoresistance element that can accurately sort out truely defective products from apparently defective products due to the manufacturing processes. Manufacturing processes for MR elements includes a MR element formation process, a magnetic field application process and an electric inspection process. In the magnetic field process, the magnetic field application is limited to a range within 75.degree. to the longitudinal direction of a MR element pattern. By performing the magnetic field application process before the electric inspection process, the anisotropic magnetic field due to a shape magnetic anisotropy of the MR element can be aligned almost in a fixed direction, defective products due to the manufacturing processes can exactly be sorted out from the apparently defective products in the electric inspection process, so that the yield rate can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.