Patent ID: 11971656
Assignee: ASML NETHERLANDS B.V.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 10:
11. A membrane for EUV lithography, the membrane comprising:
a membrane layer comprising silicon; and
a capping layer comprising at least one selected from: Ru, Zr, Mo, a silicon oxide, a zirconium oxide, an aluminum oxide, boron nitride, a ruthenium oxide, a ruthenium nitride, a zirconium nitride, a molybdenum oxide, a molybdenum nitride or a molybdenum silicide,
wherein the material for the capping layer has a low stress with tensile stress of 300 MPa or lower, and
wherein the capping layer has a thickness of at least 1 nm and at most 10 nm.