Graft polymers and use thereof

• US 6,197,896 B1
• Filed: 07/12/1999
• Issued: 03/06/2001
• Est. Priority Date: 07/12/1999
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Aviram, Ari, Babich, Inna V.
• Primary Examiner(s): Baxter, Janet
• Assistant Examiner(s): Lee, Sin J.
• Application Number:
  US09/351,421
• Time in Patent Office: 603 Days
• Field of Search: 524/379, 524/391, 524/504, 525/360, 525/370
• US Class Current: 525/370
• CPC Class Codes: C08F 8/42 Introducing metal atoms or metal-containing groups

Abstract

Solutions of graft polymers of a polymer having reactive hydrogen groups and grafted through reactive hydrogen groups an alkoxy metallic compound wherein the metal is titanium, zirconium and/or hafnium are useful as photoresist materials which are resistant to plasma. Also, compounds and graft polymers wherein the alkoxy metallic compound also contains silicon, tin or germanium are provided.

Claims

1. A solution of a graft polymer comprising a polymer having reactive hydrogen groups and grafted through reactive hydrogen groups an alkoxy metallic compound wherein the metal is selected from the group consisting of titanium, zirconium, hafnium and mixtures thereof, and an alcohol solvent;

wherein the alkoxy metallic compound further includes at least one member selected from the group consisting of silicon, tin and germanium.

2. The solution of claim 1 wherein the alkoxy metallic compound comprises a titanium alkoxy compound.

3. The solution of claim 2 wherein the alkoxy compound is titanium tetramethoxide.

4. The solution of claim 2 wherein the alkoxy compound is titanium tetraethoxide.

5. The solution of claim 2 wherein the alkoxy compound is titanium tetrapropoxide.

6. The solution of claim 2 wherein the alkoxy compound is titanium tetrabutoxide.

7. The solution of claim 2 wherein the alkoxy compound is titanium tetrapentoxide.

8. The solution of claim 2 wherein the alkoxy compound is titanium tetrahexoxide.

9. The solution of claim 2 wherein the alkoxy compound is titanium tetraheptoxide.

10. The solution of claim 2 wherein the alkoxy compound is titanium tetraoctoxide.

11. The solution of claim 1 wherein the alkoxy metallic compound comprises a zirconium alkoxy.

12. The solution of claim 11 wherein the alkoxy compound is zirconium tetramethoxide.

13. The solution of claim 11 wherein the alkoxy compound is zirconium tetraethoxide.

14. The solution of claim 11 wherein the alkoxy compound is zirconium tetrapropoxide.

15. The solution of claim 11 wherein the alkoxy compound is zirconium tetrabutoxide.

16. The solution of claim 11 wherein the alkoxy compound is zirconium tetrapentoxide.

17. The solution of claim 11 wherein the alkoxy compound is zirconium tetrahexoxide.

18. The solution of claim 11 wherein the alkoxy compound is zirconium tetraheptoxide.

19. The solution of claim 11 wherein the alkoxy compound is zirconium tetraoctoxide.

20. The solution of claim 1 wherein the alkoxy metallic compound comprises a hafnium alkoxy compound.

21. The solution of claim 20 wherein the alkoxy compound is hafnium ethylhexano-tert-butoxide.

22. The solution of claim 1 wherein the alcohol contains 1 to 12 carbon atoms.

23. The solution of claim 1 wherein the alcohol comprises ethanol.

24. The solution of claim 1 which further contains a cosolvent.

25. The solution of claim 24 wherein the cosolvent is selected from the group consisting of dimethylformamide, perfluoroisopropanol and 1-methyl-1-pyrolidinone.

26. The solution of claim 1 wherein the amount of the alkoxy metallic compound is about 0.1 to about 15 molar % of the polymer.

27. The solution of claim 1 wherein the reactive hydrogen is selected from the group consisting of hydroxy, amino, amido, carboxyl acid and mixtures thereof.

28. The solution of claim 1 wherein the polymer is selected from the group consisting of polymers of hydroxy alkyl acrylate, polymer of hydroxy alkyl methacrylate, novalac, polymer of vinyl alcohol, polymer of hydroxy styrene, polyamide, cellulosic polymer, starch, rayon and protein.

29. The solution of claim 1 wherein the polymer is at least one polymer selected from the groups consisting of:

a) polymer having pendant recurring groups selected from the group consisting of

—

COO—

CH₂—

CH(OH)—

(CH₂)_x—

H, wherein x is 0-20;

—

COO—

CH₂—

CH(OH)—

(CH₂)_y—

HE—

(CH₂)_z—

H; and

mixtures thereof,

wherein HE is O or S, and each y and z individually is 1-18;

b) a copolymer from

1) at least one monomer selected from the group consisting of 2-hydroxyalkyl methacrylate, 2-hydroxyalkyl acrylate, and mixtures thereof wherein the alkyl has 1-10 carbon atoms; and

2) at least one monomer selected from the group consisting of alkylacrylate, alkylmethacrylate, and mixtures thereof wherein the alkyl has 1-10 carbon atoms, and wherein the amount of

     1) is about 75 to about 95 weight % and the amount of

     2) is corresponding about 5 to about 25 weight % being based upon the total weight of

     1) and

     2); and

c) mixtures of the above.

30. The solution of claim 1 wherein the polymer comprises a poly(betahydroxyalkyl methacrylate).

31. The solution of claim 1 wherein the polymer comprises poly(betahydroxyethyl methacrylate).

32. The solution of claim 1 wherein the polymer comprises a copolymer selected from the group consisting of copolymer of 2-hydroxyethyl methacrylate and methylmethacrylate;

copolymers of 2-hydroxypropyl methacrylate and methylmethacrylate;

copolymers of 2-hydroxyethyl methacrylate and t-butylmethacrylate;

copolymers of 2-hydroxypropyl methacrylate and t-butylmethacrylate;

copolymers of 2-hydroxyethyl acrylate and t-butylmethacrylate;

copolymers of 2-hydroxypropyl acrylate and t-butylmethacrylate;

copolymers of 2-hydroxyethyl methacrylate and methacrylate;

copolymers of 2-hydroxypropyl methacrylate and methylacrylate;

copolymers of 2-hydroxyethyl acrylate and methylmethacrylate;

copolymers of 2-hydroxypropyl acrylate and methylmethacrylate;

copolymers of 2-hydroxyethyl acrylate and methylacrylate;

copolymers of 2-hydroxypropyl acrylate and methylacrylate;

copolymers of 2-hydroxypropyl acrylate and methylacrylate;

copolymers of 2-hydroxybutyl methacrylate and methylmethacrylate;

copolymers of 2-hydroxybutyl acrylate and methylmethacrylate; and

copolymers of 2-hydroxypentyl acrylate and methylmethacrylate mixtures.

33. The solution of claim 1 wherein the polymer comprises a copolymer of 2-hydroxyethyl methacrylate and methylmethacrylate.

34. The solution of claim 1 wherein the polymer comprises a copolymer of 2-hydroxyethyl methacrylate and t-butyl methacrylate.

35. The solution of claim 1 wherein the alkoxy compound is zirconium tetrapentoxide.

36. The solution of claim 1 wherein the alkoxy compound is zirconium tetrahexoxide.

37. The solution of claim 1 wherein the alkoxy compound is zirconium tetraheptoxide.

38. The solution of claim 1 wherein the alkoxy compound is hafnium ethylhexano-tert-butoxide.

39. A solution of a graft polymer comprising a polymer having reactive hydrogen groups and grafted through reactive hydrogen groups an alkoxy metallic compound selected from the group consisting of zirconium tetrapentoxide;

zirconium tetrahexoxide;

zirconium tetraheptoxide; and

hafnium ethylhexano-tert-butoxide.

40. A solution of a graft polymer comprising a polymer having reactive hydrogen groups and grafted through reactive hydrogen groups an alkoxy metallic compound wherein the metal is selected from the group consisting of titanium, zirconium, hafnium and mixtures thereof, and an alcohol solvent;

wherein the polymer is cotton or paper.

41. A solution of a graft polymer comprising a polymer having reactive hydrogen groups and grafted through reactive hydrogen groups an alkoxy metallic compound wherein the metal is selected from the group consisting of titanium, zirconium, hafnium and mixtures thereof, and an alcohol solvent;

wherein the alkoxy metallic compound further includes a dye moiety.

42. A graft polymer comprises a polymer having reactive hydrogen groups and grafted through reactive hydrogen groups an alkoxy metallic compound wherein the metal is selected from the group consisting of titanium, zirconium, hafnium and mixtures thereof and further comprises at least one member selected from the group consisting of silicon, tin and germanium.