Patent ID: 11860529
Assignee: SHIN-ETSU CHEMICAL CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A manufacturing method for the substrate with a multilayer reflection film for an EUV mask blank of claim 1, the method comprising the step of
(A) forming the Si/Mo laminated portion by sputtering, wherein
the sputtering is performed by a magnetron sputtering apparatus comprising a chamber, wherein in the chamber,
one or more Mo targets and one or more Si targets are attachable;
powers are individually applicable to the Mo target and the Si target;
the substrate and each of the targets are disposed in offset arrangement;
none of shield members are disposed between the substrate and each of the targets;
the substrate is rotatable along its main surface; and
nitrogen-containing gas is introducible.