Projection exposure method and apparatus
US6235438A · kind A · utility
48Cited by
11References
91Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1998 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Oct 6, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/70358
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection exposure apparatus comprises a projection optical system for projecting a pattern of a mask on a photosensitive substrate; a plane-parallel plate disposed on a side of the photosensitive substrate of the projection optical system, almost perpendicularly to an optical axis of the projection optical system; and a adjustment device for adjusting at least one of an inclination angle of a normal line of the plane-parallel plate relative to the optical axis of the projection optical system and an inclination angle of the plane-parallel plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.