Photomask blank

FIG. 1 is a front elevational view of a photomask blank showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is an enlarged partial front view along line 7 — 7 in FIG. 1 ;

FIG. 8 is a reduced scale front, left side, top perspective view of the portion shown in FIG. 7 ; and,

FIG. 9 is a sectional view along line 9 — 9 in FIG. 7 .

The broken line showing is for illustrative purposes only and forms no part of the claimed design.