Patent ID: 11886118
Assignee: SHIN-ETSU CHEMICAL CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  C  H | IPC C  G  H

Claim 16:
17. A patterning process comprising:
forming an organic film by using the material for forming an organic film according to claim 1 on a body to be processed;
forming an inorganic hard mask selected from a silicon oxide film, a silicon nitride film, a silicon oxynitride film, a titanium oxide film, and a titanium nitride film on the organic film;
forming an organic antireflective coating on the inorganic hard mask;
forming a resist upper layer film by using a photoresist composition on the organic antireflective coating, so that a 4-layered film structure is constructed;
forming a circuit pattern in the resist upper layer film;
transferring the pattern to the organic antireflective coating and the inorganic hard mask by etching the organic antireflective coating and the inorganic hard mask while using the resist upper layer film having the formed pattern as a mask;
transferring the pattern to the organic film by etching the organic film while using the inorganic hard mask having the transferred pattern as a mask; and
further transferring the pattern to the body to be processed by etching the body to be processed while using the organic film having the transferred pattern as a mask.