Etching process for accurately making small holes in thick...

Details Etching process for accurately making small holes in thick... Etching process for accurately making small holes in thick...

C - Chemistry, Metallurgy

23

F

149/10

C23F 1/00 (2006.01) C23F 1/02 (2006.01) H01J 9/14 (2006.01)

Patent

CA 1047377

Abstract A sheet of metallic material in web form having a thick- ness T is partially covered on opposite sides by an etchant resist. The sheet of material is then etched partially from both sides which is followed by applying a protective layer to one side of the sheet. Next, the side opposite the protective layer is etched until the sheet is etched through.

209902

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