Patent ID: 11881400
Assignee: CENTRAL GLASS COMPANY, LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC G  H  C | IPC C  G  H

Claim 0:
1. A patterned substrate production method, comprising:
a first step of providing a substrate unit which comprises a substrate and a three-layer film arranged on the substrate and having an organic layer formed on the substrate, a silicon-containing intermediate layer on the organic layer and a resist layer formed on the silicon-containing intermediate layer, exposing the resist layer to an energy ray through a photomask and developing the exposed resist layer with an alkaline aqueous solution to form a pattern in the resist layer, wherein the silicon-containing intermediate layer is formed using a silicon-containing layer forming composition which comprises a polysiloxane compound (A) having a structural unit of the formula (1) and a solvent (B)

[(R1)bR2mSiOn/2]  (1)

where R1 is a group represented by the following formula:, a is an integer of 1 to 5; and a wavy line means that a line which the wavy line intersects is a bond; R2 is each independently a hydrogen atom, a C1-C3 alkyl group, a phenyl group, a hydroxy group, a C1-C3 alkoxy group or a C1-C3 fluoroalkyl group; b is an integer of 1 to 3; m is an integer of 0 to 2; n is an integer of 1 to 3; and a relationship of b+m+n=4 is satisfied;
a second step of dry-etching the silicon-containing intermediate layer through the pattern of the resist layer, thereby forming a pattern in the silicon-containing intermediate layer;
a third step of dry-etching the organic layer through the pattern of the silicon-containing intermediate layer, thereby forming a pattern in the organic layer; and
a fourth step of dry-etching the substrate through the pattern of the organic layer, thereby patterning the substrate.