Exposure apparatus for forming image
US5258808A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1992 |
| Grant date | Nov 2, 1993 |
| Priority date | — |
| Expiry date | Aug 7, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/1572
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An appropriate photochemical reaction is produced in electrodeposited photoresist applied to the surface of a board and to the inner wall surfaces of holes extending through the board, for improving the efficiency of the operation of image formation. Upper and lower ultraviolet illumination devices and upper and lower light condensers 34a, 34b are provided. Each ultraviolet illumination device has a discharge lamp 32 and a reflecting mirror 33. Each light condenser consists of a horizontal array of a multiplicity of lenses 35 placed close to each other. The upper and lower ultraviolet illumination devices are disposed respectively above and below the board 31 in a symmetrical relation with respect to the board. The upper light condenser 34a is disposed between the upper discharge lamp 32 and the board 31, while the lower light condenser 34b is located between the lower discharge lamp 32 and the board 31. These light condenser which are spaced from each other can be moved horizontally. The lenses 35 are optically arranged in such a way that ultraviolet rays passed through the lenses 35 form conical outgoing light surrounding the optical axes of the lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.