Process for producing an electronic part and the electronic part

Details Process for producing an electronic part and the electronic part Process for producing an electronic part and the electronic part

1995-01-20

1996-04-16

Powell, William

Etching a substrate: processes

Forming or treating electrical conductor article

Forming or treating of groove or through hole

216 39, 216 41, 257759, H01B 1300, B44C 122, C23F 100

Patent

active

055074030

ABSTRACT:
An electronic part is produced by forming two metallic wiring films of different materials on a main substrate, where a first metallic wiring film is formed on the main substrate, a protective film is formed in desired regions on the main substrate and the first metallic wiring film, and a second metallic wiring film is formed on the first metallic wiring film. The thus produced electronic part has an insulating protective film between the first and second metallic wiring films. By the presence of the protective film the surface of the first metallic wiring film is protected from etching, corrosion or deterioration by an agent for patterning the second metallic wiring film.

REFERENCES:
patent: 4713494 (1987-12-01), Oikawa et al.

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