Process for forming apertures in a metallic sheet

Etching a substrate: processes – Etching to produce porous or perforated article

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216 65, 216 87, B31D 300, B44C 122, C23C 100

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055095569

ABSTRACT:
A process of forming an aperture in a metallic sheet including the steps of:

REFERENCES:
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Howrilka, et al., "Hole Cleaning", IBM Technical Disclosure Bulletin, 21, No. 3, p. 961 (Aug. 1978).
IBM Research Disclosure 26969, "High Resolution Moly Masks By Laser Etching", Sep. 1986, p. 572.

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