Printed circuit board having electromagnetic wave shield layer and self-contained printed resistor
US5270493A · kind A · utility
75Cited by
8References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 12, 1991 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | Nov 12, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/1453
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multi-layer printed circuit board with self-contained printed resistors includes an undercoat layer made of an insulating material and formed on an outermost conductor circuit at least except for a ground portion of the outermost conductor circuit; an electro-magnetic wave shield layer made of a cured copper paste and formed on the undercoat layer and the ground portion of the outermost conductor circuit so as to cover a generally entire surface of the outermost conductor circuit; and protective overcoat covering an outer surface of the shield layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.