Current sensor and current sensor manufacturing method
US7129691B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 1, 2002 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | May 19, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/48247
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A low-cost, current sensor suitable for mass production and a manufacturing method thereof are provided. The current sensor is small with high sensitivity and can be packaged in a standard assembly line which is normally used when an integrated circuit is manufactured. Further, it is possible to obtain a sufficient shielding effect against a disturbance flux without degrading the detecting sensitivity of a flux. A first magnetic material 50 is bonded to the lower part of a current conductor 22C. The first magnetic material 50 has the function of converging and amplifying a flux 3 generated by the current to be measured. A second magnetic material 51 is bonded above a magnetic sensor chip 20. The second magnetic material 51 has a shielding function against a disturbance flux entering from the outside.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.