Marking apparatus used in a process for producing multi-layered printed circuit board
US6597757B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2002 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Oct 8, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/09918
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A marking apparatus for forming alignment marks, which improves the alignment accuracy of each layer in the production of multi-layered printed circuit boards. An X-ray generator 11 irradiates X-rays at a standard mark 50 in a core board 51 of a board 5, and projects the image of the standard mark 50 on a fluorescence screen 12. The image is captured by a visible light CCD camera 13, thereby the position of the standard mark 50 is detected. Using the detected position of the standard mark 50 as an alignment reference, the apparatus irradiates ultra-violet rays at dry film resist layers 55 via mirrors 22 and 23, and imprints the marks emerged on photo masks 24 and 25 on the dry film resist layers 55, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.