Methods for shielding one or more circuit of a printed circuit board
US6990734B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2002 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Nov 27, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49156
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods for forming a metal shield on a printed circuit board (10) include depositing a first layer of metal (41) on a substrate (22) of the printed circuit board (10), depositing a first layer of dielectric material (42) on the first layer of metal (41), printing one or more circuits (21, 21′) on the first dielectric layer (42), depositing a second layer of dielectric material (43) over the one or more printed circuits (21, 21′), forming a trench-like opening (44) in the two layers of dielectric material (42, 43) surrounding the one or more printed circuits (21, 21′) so that the metal of the first layer (41) is exposed by the trench-like opening (44), depositing a second layer of metal (27) on the second layer of dielectric material (43) such that the second layer of metal (27) plates the trench-like opening (44) and makes electrical contact with the first metal layer (41).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.