Patent ID: 7244656

Claim:
A method for manufacturing a thin film circuit board device, the method comprising: forming a base board having a flattened main surface to serve as a build-up forming surface, said flattened main surface including a wiring pattern surface; and forming a circuit part which includes (a) insulating and wiring layers built up and formed on the build-up forming surface of the base board, (b) a receiving electrode part having a titanium layer and an electrode layer sequentially laminated on the insulating layer and (c) at least one of a capacitor part and a resistor part as a passive element part electrically connected to the receiving electrode part, wherein the circuit part forming step comprises: forming a substrate titanium film and a non-titanium substrate film sequentially laminated on the insulating layer so as to cover the receiving electrode part and the passive element part, forming and patterning a patterned metallic film on the non-titanium substrate film as the wiring layer, etching the non-titanium substrate film using a wet type etching to remove the non-titanium substrate film in an area in which the metallic film is not formed using the metallic film as a shield part to pattern and form a substrate layer, and etching the substrate titanium film using a wet type etching to remove the substrate titanium film in the area in which the metallic film is not formed to form and pattern a substrate titanium layer.