Composition for film formation for lithography, film for lithography, method for forming resist pattern, and method for forming circuit pattern

Patent metadata

Field	Value
Publication number	US-2020354501-A1
Application number	US-201816765354-A
Country	US
Kind code	A1
Filing date	Nov 16, 2018
Priority date	Nov 20, 2017
Publication date	Nov 12, 2020
Grant date	—

Abstract

A composition for film formation for lithography of the present invention comprises at least one selected from the group consisting of an aromatic hydrocarbon formaldehyde resin and a modified aromatic hydrocarbon formaldehyde resin, wherein the aromatic hydrocarbon formaldehyde resin is a product of condensation reaction between an aromatic hydrocarbon having a substituted or unsubstituted benzene ring and formaldehyde, and the modified aromatic hydrocarbon formaldehyde resin is formed by modifying the aromatic hydrocarbon formaldehyde resin.

First claim

1 . A composition for film formation for lithography, comprising at least one selected from the group consisting of an aromatic hydrocarbon formaldehyde resin and a modified aromatic hydrocarbon formaldehyde resin, wherein the aromatic hydrocarbon formaldehyde resin is a product of condensation reaction between an aromatic hydrocarbon having a substituted or unsubstituted benzene ring and formaldehyde, and the modified aromatic hydrocarbon formaldehyde resin is formed by modifying the aromatic hydrocarbon formaldehyde resin.

2 . The composition for film formation for lithography according to claim 1 , wherein the aromatic hydrocarbon formaldehyde resin is a xylene formaldehyde resin, which is a product of condensation reaction between xylene and formaldehyde, and the modified aromatic hydrocarbon formaldehyde resin is a modified xylene formaldehyde resin formed by modifying the xylene formaldehyde resin.

3 . The composition for film formation for lithography according to claim 1 , wherein the modified aromatic hydrocarbon formaldehyde resin is at least one selected from the group consisting of the following (X1), (X2), (X3) and (X4):
(X1) a phenol-modified aromatic hydrocarbon formaldehyde resin formed by modifying the aromatic hydrocarbon formaldehyde resin with a phenol represented by the following formula (1); (X2) a polyol-modified aromatic hydrocarbon formaldehyde resin formed by modifying the aromatic hydrocarbon formaldehyde resin with a polyol; (X3) an epoxy-modified aromatic hydrocarbon formaldehyde resin; and (X4) an acrylic modified aromatic hydrocarbon formaldehyde resin,

wherein Ar 0 represents an aromatic ring; R 0 represents a hydrogen atom, an alkyl group, an aryl group or an alkoxy group; a represents an integer of 1 to 3; b represents an integer of 0 or more; and when there are a plurality of R 0 , the plurality of R 0 may be the same or different.

4 . The composition for film formation for lithography according to claim 3 , wherein the phenol represented by the above formula (1) is phenol, 2,6-xylenol or 3,5-xylenol.

5 . The composition for film formation for lithography according to claim 3 , wherein the polyol is a polyol represented by the following formula (1a):

wherein nx3a represents an integer of 0 to 5.

6 . The composition for film formation for lithography according to claim 3 , wherein the epoxy-modified aromatic hydrocarbon formaldehyde resin is a resin obtained by reacting the phenol-modified aromatic hydrocarbon formaldehyde resin with epihalohydrin.

7 . The composition for film formation for lithography according to claim 3 , wherein the acrylic modified aromatic hydrocarbon formaldehyde resin is a resin obtained by esterifying the polyol-modified aromatic hydrocarbon formaldehyde resin with acrylic acid or a derivative thereof.

8 . The composition for film formation for lithography according to claim 1 , wherein the aromatic hydrocarbon formaldehyde resin is a deacetalized aromatic hydrocarbon formaldehyde resin that has been subjected to a deacetalization treatment, and the modified aromatic hydrocarbon formaldehyde resin is a resin formed by modifying the deacetalized aromatic hydrocarbon formaldehyde resin.

9 . The composition for film formation for lithography according to claim 1 , wherein the modified aromatic hydrocarbon formaldehyde resin comprises a compound represented by the following formula (2):

wherein Ar 1 represents an aromatic ring or an aliphatic ring; R 1 is a methylene group, a methyleneoxy group, an oxymethylene group or a divalent group formed by combining two or more groups thereof; R 2 represents a hydrogen atom, a hydroxy group, an alkyl group having 1 to 30 carbon atoms, an aryl group having 6 to 30 carbon atoms, an alkoxy group having 1 to 30 carbon atoms, an alkoxycarbonyl group having 1 to 30 carbon atoms, an alkenyl group having 2 to 30 carbon atoms, a group represented by the following formula (A) or a crosslinkable reactive group, wherein the alkyl group, the aryl group, the alkoxy group and the alkenyl group may be substituted with one substituent selected from the group consisting of a hydroxy group, an alkyl group having 1 to 12 carbon atoms and an alkoxy group, and wherein the alkyl group, the aryl group, the alkoxy group and the alkenyl group may comprise one bonding group selected from the group consisting of an ether bond, a ketone bond and an ester bond, where, when there are a plurality of R 2 , the plurality of R 2 may be the same or different; R 3 is a hydrogen atom, a hydroxy group, an alkyl group having 1 to 3 carbon atoms, an aryl group, a hydroxymethylene group or a group represented by the following formula (B), the following formula (C1), the following formula (C2) or the following formula (C3), where, when there are a plurality of R 3 , the plurality of R 3 may be the same or different; m represents an integer of 1 or more; n represents an integer of 1 or more; the arrangement of each unit is arbitrary; x represents an integer of 0 or more; and y represents an integer of 0 to 4, provided that either the formula (2) necessarily has any of the groups represented by the following formula (A), the following formula (B), the following formula (C1), the following formula (C2) and the following formula (C3), or Ar 1 represents an aromatic ring and at least one of R 2 bonded to the aromatic ring Ar 1 is a hydroxy group;

wherein nx3 represents an integer of 1 to 5;

wherein nx3′ represents an integer of 1 to 5 and Ry represents a hydrogen atom or a methyl group;

wherein nx4 represents an integer of 1 to 5; and

wherein nx4′ represents an integer of 1 to 5.

10 . The composition for film formation for lithography according to claim 1 , further comprising a radical polymerization initiator.

11 . The composition for film formation for lithography according to claim 10 , wherein the radical polymerization initiator is at least one selected from the group consisting of a ketone-based photopolymerization initiator, an organic peroxide-based polymerization initiator and an azo-based polymerization initiator.

12 . The composition for film formation for lithography according to claim 10 , wherein a content of the radical polymerization initiator is 0.05 to 50 parts by mass based on 100 parts by mass of the solid content of the composition for film formation for lithography.

13 . The composition for film formation for lithography according to claim 1 , further comprising at least one selected from the group consisting of a photocurable monomer, a photocurable oligomer and a photocurable polymer.

14 . The composition for film formation for lithography according to claim 1 , further comprising a solvent.

15 . The composition for film formation for lithography according to claim 1 , further comprising an acid generating agent.

16 . The composition fo

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• Makinoshima Takashi
• Echigo Masatoshi
• Miki Yasushi

Classifications

• C09D161/18 Primary

  Condensation polymers of aldehydes or ketones with aromatic hydrocarbons or their halogen derivatives only · CPC title

• G03F7/039

  Macromolecular compounds which are photodegradable, e.g. positive electron resists (G03F7/075 takes precedence; macromolecular quinonediazides G03F7/023) · CPC title

• G03F7/0045

  with organic non-macromolecular light-sensitive compounds not otherwise provided for, e.g. dissolution inhibitors · CPC title

• G03F7/004 Primary

  Photosensitive materials (G03F7/12, G03F7/14 take precedence) · CPC title

• G03F7/11

  having cover layers or intermediate layers, e.g. subbing layers {(G03F7/091 - G03F7/093, B41N3/03 take precedence)} · CPC title