Etching a substrate: processes – Forming or treating an article whose final configuration has...
Patent
1997-05-23
2000-10-24
Lund, Jeffrie R
Etching a substrate: processes
Forming or treating an article whose final configuration has...
216 41, 216 47, 83861, 83862, 83881, B44C 122, B26D 306, B26D 1100
Patent
active
061362093
ABSTRACT:
A first method of constructing a die sheet includes covering a die surface with a first, spaced pattern of a first photo-resist material and then covering the first pattern with a second, continuous pattern of a second photo-resist material. A chemical removes material from sections not covered by the second pattern and the second pattern is then removed. A chemical removes material from die surface sections not covered by the first pattern. A second method of constructing a die sheet includes covering sections of a die surface with a pattern of photo-resist material having alternating slitting segments and wider perforating segments. A chemical removes material from uncovered sections and completely undercuts the slitting segments to form slitting sections and undercuts the perforating segments to form higher extending perforating sections.
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Lund Jeffrie R
Powell Alva C.
Xynatech, Inc.
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