| 摘要 |
PROBLEM TO BE SOLVED: To obtain a laminated sheet material wherein a frame part can be continuously peeled and removed in a belt like shape and to obtain a punching method of the laminated sheet material. SOLUTION: At the laminated sheet material 32, a plurality of inner side half cut parts 71 and 72 cut according to the shape of a disk substrate are provided side by side mutually at a space and outer side half cut parts 81 and 82 are provided on the outer side thereof. End parts of the outer side half cut parts 81 and 82 mutually cross and link with each other to form a linking cut line 80A. Since a crossing end parts 81B and 82B of the linking cut line 80A are positioned in a peeling remainder part 64, a crack is hardly generated from end parts to the edging part 62 of the linking cut line 80A when the edging part 62 is peeled and removed and thus the edging part 62 can be continuously peeled and removed in a belt like shape. COPYRIGHT: (C)2005,JPO&NCIPI
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