Method of making an electrical current sensor
US6769166B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 14, 2000 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Feb 14, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49146
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of making an electrical current sensor having an electrical conducting portion (6; 6a, 6b) of rectangular cross-section being surrounded, on three of its lateral faces, by a magnetic circuit portion (7) which has end portions (7′, 7″) having planar surfaces situated substantially in a plane of a fourth lateral face of the conductor portion (6), a magnetic field detector (3; 24; 26) being arranged opposite the fourth lateral face. The conductor portion (6) is made by photo-lithography and etching in a layer of electrically conducting material applied on a first surface of a flat support member (1; 1′; 1″) or on intermediate layers (8, 9, 10, 11) deposited on the support member. The magnetic circuit portion (7) is made by photo-lithography and etching in a layer of magnetically permeable material applied on the conductor portion (6) on the first surface of the support member (1; 1′, 1″) or of an intermediate layer (8). The magnetic field detector (3; 26) is fixed to the support member (1; 1′, 1″) or on intermediate layers (9, 10, 11) deposited on a second surface of the support member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.