초록

A conductive film formed on a substrate can be etched by coating an etching solution containing 0 to 30 wt % of polyhydric alcohol and tackified to a viscosity of at least 10 cps.

대표청구항 ▼

A method of producing a pattern of an electrically conductive film on a substrate comprising: providing a substrate coated with a continuous layer of an electrically conductive material; depositing an etchant composition on selected areas of said layer, said etchant composition consisting essentiall

A method of producing a pattern of an electrically conductive film on a substrate comprising: providing a substrate coated with a continuous layer of an electrically conductive material; depositing an etchant composition on selected areas of said layer, said etchant composition consisting essentially of an aqueous solution of an etching agent effective for reacting with said electrically conductive material to form water-soluble reaction products, said aqueous solution containing dissolved therein from 0.01 to 30% by weight of a water-soluble organic polymer effective to increase the viscosity of said composition to at least 10 cps, said aqueous solution also containing dissolved therein up to 30% by weight of a polyhydric alcohol capable of preventing the evaporation of water from said etchant composition; maintaining said etchant composition on said selected areas of said layer until said etching agent has reacted with said electrically conductive material to form water-soluble reaction products; and then applying water to remove said etchant composition and said water-soluble reaction products from said layer.