Patent ID: 11906896
Assignee: TOPPAN PHOTOMASK CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A reflective photomask blank comprising:
a reflective layer configured to reflect incident light; and
an absorption layer configured to absorb incident light,
the reflective layer and the absorption layer being formed in this order on one surface side of a substrate, wherein
the absorption layer contains a first material selected from the group consisting of tin, indium, and tellurium and a second material containing one or two or more of materials selected from the group consisting of transition metals, bismuth (Bi), and silicon (Si) at least in an outermost layer, and
a content of the second material is more than 20 at % and less than 50 at % in a same layer.