摘要:
Disclosed is a process for producing a copper through-hole printed circuit board, which comprises forming a required pattern on a copper-clad laminated plate using a resist ink soluble in an alkaline aqueous solution, immersing the copper-clad laminated plate in an aqueous solution of a salt or an alkylimidazole compound represented by the following general formula wherein R 2 represents an alkyl group having 5 to 21 carbon atoms, R 4 represents a hydrogen atom or a methyl group, and HA represents an organic or inorganic acid, to form on the copper surface of the copper-clad laminated plate an etching resist film composed of the alkylimidazole compound, drying the resulting copper-clad laminated plate, and then treating it with an alkaline etching solution.
摘要:
A process for the formation of a chemical conversion coating on the surface of copper or a copper alloy comprises contacting the metal surface with an aqueous solution containing an imidazole compound having an alkyl group having 5 to 21 carbon atoms at the 2-position, wherein a substance capable of generating a copper ion or zinc ion is dissolved and contained in the aqueous solution containing the alkylimidazole compound.
摘要:
Disclosed is a process for producing a copper through-hole printed circuit board, which comprises forming a required pattern on a copper-clad laminated plate using a resist ink soluble in an alkaline aqueous solution, immersing the copper-clad laminated plate in an aqueous solution of a salt or an alkylimidazole compound represented by the following general formula wherein R 2 represents an alkyl group having 5 to 21 carbon atoms, R 4 represents a hydrogen atom or a methyl group, and HA represents an organic or inorganic acid, to form on the copper surface of the copper-clad laminated plate an etching resist film composed of the alkylimidazole compound, drying the resulting copper-clad laminated plate, and then treating it with an alkaline etching solution.