Patent ID: 11879823
Assignee: BUNDESANSTALT FÜR MATERIALFORSCHUNG UND-PRÜFUNG (BAM)
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 11:
12. A method for the production of a filter substrate according to claim 1, in which, in a wafer with a thickness of at least 100 μm and a transmission degree of at least 10% for radiation in the wavelength range of 2,500 nm to 15,000 nm, filter holes with a diameter of at least 1 μm are introduced at least in regions, and the surface of the front-side and/or the surface of the rear-side of the wafer is provided, completely or in regions, with an antireflection layer which prevents an optical reflection of radiation in the wavelength range of 200 nm to 10,000 nm.