Patent · US Active

Phase-shift mask for extreme ultraviolet lithography

US10719008B2 · kind B2 · utility

2Cited by
4References
20Claims
0Family size

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Key dates

Filing dateJun 16, 2017
Grant dateJul 21, 2020
Priority date
Expiry dateJul 20, 2037

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG03F1/52
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A phase-shift mask for extreme ultraviolet (EUV) lithography may be provided. The phase-shift mask may include a substrate, a reflection layer on the substrate, and phase-shift patterns including at least one metal nitride on the reflection layer. The at least one metal nitride may include at least one of TaN, TiN, ZrN, HfN, CrN, VN, NbN, MoN, WN, AlN, GaN, ScN, and YN.

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