Patent ID: 7960077

Claim:
A reflective mask blank for EUV lithography, comprising: a substrate having a front surface and a rear surface; a reflective layer formed over the front surface of the substrate; an absorbing layer formed over the reflective layer; and a chucking layer formed on the rear surface of the substrate and positioned to chuck the substrate to an electrostatic chuck, wherein the substrate has a non-conducting portion which eliminates electrical conduction between the reflective layer and the chucking layer and electrical conduction between the absorbing layer and the chucking layer, and the non-conducting portion is formed by forming a portion of the substrate covered with at least one covering member and preventing formation of the reflective layer and the absorbing layer such that the non-conducting portion provides the resistance value of 1 MΩ or above between the reflective layer and the chucking layer and the resistance value of 1 MΩ or above between the absorbing layer and the chucking layer.