Isolator and method of manufacturing isolator
US9761545B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2016 |
| Grant date | Sep 12, 2017 |
| Priority date | — |
| Expiry date | Jul 1, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2225/06541
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An isolator is configured by a transmission circuit, a transformer, and a reception circuit. A first coil of the transformer is disposed on a back surface of a first semiconductor substrate; a transmission circuit and a second coil of the transformer are disposed on a front surface. The first coil is embedded within a coil trench, is led out through an embedded via-metal-film to a substrate front surface, and is electrically connected to the transmission circuit. The second coil is disposed on an insulating layer of the substrate front surface. The reception circuit is disposed on a front surface of a second semiconductor substrate. The second coil and the reception circuit are electrically connected to each other by connecting first and third electrode pads disposed respectively on the front surfaces of the first and second semiconductor substrates through wires.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.