Marking apparatus used in a process for producing multi-layered printed circuit board
US7614787B2 · kind B2 · utility
1Cited by
5References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2007 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | Aug 3, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/09918
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
X-rays are irradiated at the board 5 from the X-ray generator 11, the image of the standard marks 50, 51 are projected on the fluorescence screen 12, the resulted image is photographed simultaneously by one shot of the visible light CCD camera 13 and finally processed by the control device 9 to simultaneously determine the position of the standard marks 50 and 51. the alignment marks depicted on the photo masks 24 and 25 are imprinted on the dry film resist layers 55 respectively based on the positions of the standard marks 50 and 51 by irradiating X-rays through the sets of mirrors 22, 23 on the dry film resist layers 55.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.