Abstract
A method for making a pellicle for EUV lithography, the method comprising: depositing a sacrificial layer onto a substrate; etching away part of the substrate so as to expose a part of the sacrificial layer; depositing a core layer onto the sacrificial layer, the core layer forming a core part of a membrane of the pellicle once made; and etching away part of the sacrificial layer so as to expose a part of the core layer; wherein the core layer is deposited after the etching of the substrate.
Original language | English |
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Patent number | NL2025186 |
IPC | G03F 7/ 20 A I |
Priority date | 12/04/19 |
Publication status | Published - 15 Oct 2020 |