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专利名称：Die and method of making the same发明人：Walter Weglin申请号：US05/6965申请日：19760616公开号：US04053348A公开日：19771011
摘要：A high precision die particularly adapted to form from a relatively heavy foilsheet a circuit board where the individual circuit elements and the spacing thereof are ofrelatively small dimensions. The die is made as follows. A working surface of a die block iscovered with a first protective overlay having an enlarged pattern corresponding to thepattern of the die elements to be formed, but enlarged by a substantially uniform widthdimension. The surface is then exposed to an etching solution to remove material fromthe exposed areas. These two steps are repeated a second time with a pattern enlargedto a lesser degree, and again a third time to bring the die elements being formed fromthe die block within quite close tolerances to the original pattern. The die faces of the dieelements are then etched to form knife edges on the die elements.
申请人：JEROBEE INDUSTRIES, INC.
代理机构：Graybeal, Barnard & Uhlir
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