Printed circuit board having through-hole stopped with photo-curable solder resist
US5402314A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1993 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Feb 3, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/0759
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A printed circuit board having a through-hole in a land is disclosed. A solder resist of a photo-curable solder resist is formed on the substrate surface of the printed circuit board and the through-hole is stopped with the same photo-curable solder resist as the solder resist layer. If a land on which a chip component is mounted co-exists with a land on which a discrete component is mounted, only the through-hole in the land on which the chip component is mounted is selectively stopped with the photo-curable solder resist. The solder resist layer and the photo-curable solder resist stopping the through-hole are formed by selective light exposure from both the front and reverse surfaces of the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.