Sheet coil
US4709221A · kind A · utility
2Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1985 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Jun 17, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4902
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sheet coil in the form of a conductor on an insulating substrate has a mending metal portion at a side portion forming the conductor gap so as to narrow the gap width. The sheet coil can be produced by forming a coil pattern on a base material made up of an insulating substrate and a metal layer laminated thereon by using a photosensitive material. The portion of the metal layer not covered with the photosensitive material is removed by etching, and, while the photosensitive material remains, a metal plating treatment is carried out so as to narrow the etched width of the metal layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.