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

Claim 13:
14. 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
(B) forming the protection layer by sputtering, wherein
the sputtering is performed by a magnetron sputtering apparatus comprising a chamber, wherein in the chamber,
one or more Ru targets and one or more targets containing at least one selected from the group consisting of metals other than Ru, and metalloids are attachable;
powers are individually applicable to the Ru target and the target containing at least one selected from the group consisting of metals other than Ru, and metalloids;
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
oxygen-containing gas is introducible.