Patent ID: 6841467

Claim:
A method for producing a semiconductor device comprising: forming a resist pattern to be used as a mask over a multi-layered film, wherein the multi-layered film includes a nitride etching stop film, a first organic insulating film, a first oxide etching stop film, a second organic insulating film, and a second oxide etching stop film layered in this order so that the second oxide etching stop film is formed between the resist pattern and the second organic insulating film to protect the second organic insulating film, wherein the nitride etching stop film and the first and second oxide etching stop films are all provided as continuous layers with no apertures defined therein when the resist pattern is formed over the multi-layered film, forming an opening by an etching process using the resist pattern as a mask during at least a part of forming the opening, wherein the opening penetrates at least the first and second organic insulating films and is of substantially the same size in both the first and second organic insulating films, and wherein the second oxide etching stop film is used as a mask when forming the opening in the first organic insulating film so that the second oxide etching stop film is thinned but is not completely removed during the forming of the opening in the first organic insulating film.