Patent · US Expired

X-ray lithography mask

US4035522A · kind A · utility

26Cited by
3References
5Claims
0Family size

Assignee

Inventor

Key dates

Filing dateApr 6, 1976
Grant dateJul 12, 1977
Priority date
Expiry dateApr 6, 1996

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10S430/168
  • WIPO fieldSemiconductors
  • WIPO sectorElectrical engineering

Abstract

An X-ray mask for variable resist exposure for use with X-ray lithography so that multi-level devices, using a single exposure of X-rays, can be made.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.