Positioning apparatus used in a process for producing multi-layered printed circuit board and method of using the same
US6870952B2 · kind B2 · utility
0Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2001 |
| Grant date | Mar 22, 2005 |
| Priority date | — |
| Expiry date | Oct 19, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/09918
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The Xray irradiation device 1 issues Xrays to board mark 7 and projects the image of the board mark 7 on the fluorescence screen 3, the fluorescence face 39 of which visibly displays the image of the board mark 7 that can be captured by the CCD camera 2. The CCD camera 2 images the board mark 7 and the mask mark 5 depicted on the photo mask 4 overlapping together. The board 6 and the photo mask 4 are aligned by exposure stage 8 so as to the board mark 7 and the mask mark 5 coincide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.