content_image/943400.jpg
m represents 0 or 1: 

<img src='content_image/943400.jpg'>

wherein Rla represents a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a cyano group or a trifluoromethyl group, 

R41 to R$_{46 }$ each independently represents a hydrogen atom, a fluorine atom or a fluoroalkyl group, with the proviso that at least one of R$_{41 }$ to R$_{46 }$ is not a hydrogen atom, 

X$_{2 }$ represents a hydrogen atom or a group capable of decomposing by the action of an acid, 

na’ represents an integer of from 1 to 5, with the proviso that when n is 2 or greater, the two or more R$_{4}$ /s to R$_{4}$ /s and X$_{2}$ ’s may be the same or different. 

2. The composition according to claim 1, wherein Re is a fluorine atom or a trifluoromethyl group. 

3. The composition according to claim 1, wherein L$_{1 }$ is a carbonyl group, an ethylene group or a single bond. 

4. The composition according to claim 1, wherein R$_{3}$ a is a tertiary alkyl group having an alicyclic group. 

5. The compos1t10n according to claim 1, wherein the resin has a weight-average molecular weight of from 3,000 to 30,000 and a molecular weight dispersion degree of from 1.1 to 1.5. 

(IV) 

6. The composition according to claim 1, wherein the resin is obtained by a process which comprises removing low molecular components from a polymer obtained by a radical polymerization method. 

7. The composition according to claim 1, wherein the resin is obtained by a living polymerization method. 

8. The composition according to claim 1, wherein the resin is obtained by a dropping polymerization method which comprises further adding a monomer continuously or intermittently during the radical polymerization of the monomer in the presence of a radical polymerization initia› tor. 

9. The composition according to claim 1, wherein the compound (B) comprises a compound (Bl) which is capable of generating an organic sulfonic acid by irradiation of actinic ray or radiation. 

10. The composition according to claim 1, wherein the compound (B) comprises a compound (B2) which is capable of generating a carboxylic acid by irradiation of actinic ray or radiation. 

11. The composition according to claim 1, which further comprises a solvent (C) comprising a mixture solvent of propylene glycol monoalkyl ether acetates with propylene glycol monoalkyl ethers or alkyl lactates. 

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