Photosensitive compositions, color filter and microlens derived therefrom

1. A composition comprising:

a) a polymer having one or more first repeating units represented by formula (IA), said first repeating unit is derived from a monomer of formula (I):

wherein:

m is an integer 0, 1 or 2;

R 1 , R 2 , R 3 and R 4 are the same or different and each independently selected from the group consisting of hydrogen, halogen, linear or branched (C 1 -C 12 )alkyl, hydroxy(C 1 -C 12 )alkyl, perfluoro(C 1 -C 12 )alkyl, (C 3 -C 12 )cycloalkyl, (C 6 -C 12 )bicycloalkyl, (C 7 -C 14 )tricycloalkyl, (C 6 -C 10 )aryl, (C 6 -C 10 )aryl(C 1 -C 6 )alkyl, perfluoro(C 6 -C 10 )aryl, perfluoro(C 6 -C 10 )aryl(C 1 -C 3 )alkyl, (C 5 -C 10 )heteroaryl, (C 5 -C 10 )heteroaryl(C 1 -C 3 )alkyl, hydroxy, (C 1 -C 12 )alkoxy, (C 3 -C 12 )cycloalkoxy, (C 6 -C 12 )bicycloalkoxy, (C 7 -C 14 )tricycloalkoxy, (C 6 -C 10 )aryloxy(C 1 -C 3 )alkyl, (C 5 -C 10 )heteroaryloxy(C 1 -C 3 )alkyl, (C 6 -C 10 )aryloxy, (C 5 -C 10 )heteroaryloxy,

(C 1 -C 6 )acyloxy, —(CH 2 ) a —C(CF 3 ) 2 OR, —(CH 2 ) a —CO 2 R,

wherein:

a is an integer from 0 to 4

b is an integer from 0 to 10;

c is an integer 0, 1, 2, 3 or 4; and

R is selected from the group consisting of hydrogen, linear or branched (C 1 -C 6 )alkyl, (C 5 -C 8 )cycloalkyl, (C 6 -C 10 )aryl and (C 7 -C 12 )aralkyl; and

one or more of a second repeating unit represented by formula (IIA) or (IIB), said second repeating unit is derived from a monomer of formula (II):

wherein:

Z is O or N—R 8 wherein R 8 is selected from the group consisting of hydrogen, linear or branched (C 1 -C 9 )alkyl, (C 3 -C 7 )cycloalkyl and (C 6 -C 12 )aryl;

R 5 , R 6 and R 7 are each independently of one another selected from the group consisting of hydrogen, linear or branched (C 1 -C 9 )alkyl, fluorinated or perfluorinated(C 1 -C 9 )alkyl, (C 6 -C 12 )aryl and (C 6 -C 12 )aryl(C 1 -C 12 )alkyl; and

wherein each of aforementioned groups, where valence is permissible, is optionally substituted with one or more groups selected from the group consisting of linear or branched (C 1 -C 6 )alkyl, (C 3 -C 7 )cycloalkyl, (C 1 -C 6 )perfluoroalkyl, (C 1 -C 6 )alkoxy, (C 3 -C 7 )cycloalkoxy, (C 1 -C 6 )perfluoroalkoxy, halogen, hydroxy, linear or branched hydroxy(C 1 -C 6 )alkyl, acetoxy, phenyl, hydroxyphenyl and acetoxyphenyl;

b) a dye selected from the group consisting of red, green, blue, yellow, magenta, black and cyan colored dye material;

c) a photoactive compound; and

d) a carrier solvent.

2. The composition of claim 1 , wherein Z is O, R 5 and R 6 are hydrogen, and R 7 is hydrogen or linear or branched (C 1 -C 9 )alkyl.

3. The composition of claim 1 , wherein m=0, R 1 , R 2 , R 3 and R 4 independently represents hydrogen, hexyl,

decyl, —(CH 2 ) 2 —C(CF 3 ) 2 OH, —(CH 2 ) 2 —CO 2 H, benzyl and phenethyl.

4. The composition of claim 1 , wherein the polymer comprises one or more first repeat units derived from the corresponding monomers selected from the group consisting of:

bicyclo[2.2.1]hept-2-ene (NB);

norbornenyl-2-trifluoromethyl-3,3,3-trifluoropropan-2-ol (HFANB);

5-phenethylbicyclo[2.2.1]hept-2-ene (PENB); and

(NBTON).

5. The composition of claim 1 , wherein the polymer comprises one or more second repeat units derived from the corresponding monomers selected from the group consisting of:

maleic anhydride; and

2-methyl-maleic anhydride.

6. The composition of claim 1 , wherein the polymer is selected from the group consisting of:

a copolymer containing repeating units derived from 5-phenethylbicyclo[2.2.1]hept-2-ene and ring opened maleic anhydride repeat units which is ring opened with methanol;

a copolymer containing repeating units derived from bicyclo[2.2.1]hept-2-ene and ring opened maleic anhydride repeat units which is ring opened with n-butanol;

a terpolymer containing repeating units derived from 5-phenethylbicyclo[2.2.1]hept-2-ene, 5-decylbicyclo[2.2.1]hept-2-ene and ring opened maleic anhydride repeat units which is ring opened with methanol; and

a copolymer containing repeating units derived from 5-phenethylbicyclo[2.2.1]hept-2-ene (PENB) and ring opened maleic anhydride repeat units which is ring opened with n-butylamine.

7. The composition of claim 1 , wherein the dye is selected from the group consisting of solvent dye, disperse dye, acid dye, basic dye, sulfur dye and vat dye.

8. The composition of claim 7 , wherein the dye is miscible in the composition.

9. The composition of claim 1 , wherein the dye is selected from the group consisting of:

10. The composition of claim 1 , wherein the photoactive compound comprises moiety selected from the group consisting of a 1,2-naphthoquinonediazide-5-sulfonyl moiety, a 1,2-naphtoquinonediazide-4-sulfonyl moiety as represented by structural formulae (IIIa) and (IIIb), respectively:

and a sulfonyl benzoquinone diazide represented by structural formula (IIIc).

11. The composition according to claim 1 , wherein the photoactive compound is

wherein at least one of Q is a group of formula (IIIa) or (IIIb):

and the remaining Q is hydrogen.

12. The composition according to claim 1 , which further comprises one or more crosslinking agents selected from the group consisting of:

13. The composition according to claim 1 , wherein the solvent is selected from the group consisting of: propyleneglycol monomethylether acetate (PGMEA), gamma-butyrolactone (GBL) and N-methylpyrrolidone (NMP).

14. The composition according to claim 1 , which further comprises one or more additives selected from the group consisting of:

dissolution promoters;

adhesion promoters;

antioxidants;

surfactants; and

mixtures in any combination thereof.

15. An article comprising an array of microlens with color filter functionality, wherein said array comprises a composition according to claim 1 .

16. The article according to claim 15 , wherein the array is in a checkerboard configuration.

17. A method of forming a film for the fabrication of color filter-microlens array in a microelectronic or optoelectronic device comprising:

coating a suitable substrate with a composition according to claim 1 to form a film;

patterning the film with a mask by exposing to a suitable radiation;

developing the film after exposure to form a photo-pattern; and

heating the patterned film to a suitable temperature to form an array of microlens.

18. A microlens arrays formed by the composition of claim 1 .

19. An optoelectronic or microelectronic device comprising the microlens arrays of claim 18 .