Thin film type common mode noise filter and fabrication method of the same
US7821368B1 · kind B1 · utility
3Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 2009 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | May 27, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2001/0092
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A thin film type common mode noise filter and its fabrication method are disclosed. There are several electric insulation layers, coil lead layers and main coil layers are formed on an insulation substrate by means of processes of Lithography, Physical Vapor Deposition, etching or other chemical process. After that the structure is covered with an electric insulation gluing layer and a magnetic material layer so as to form a thin film type common mode noise filter with a low production cost but an improved filtering characteristic of the common mode noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.