Composition for preparing organic insulating film, organic insulating film prepared by using the same and organic thin film transistor comprising the organic insulating film

A method of fabricating an organic insulating film comprising forming the organic insulating film including a composition comprising an organic insulating polymer represented by the following Formula 1:

• wherein R is represented by the following Formula 2;
• the sum of m and n is about 1;
• m is a real number ranging from about 0.1 to about 0.9;
• n is a real number ranging from about 0.1 to about 0.9;
• the sum of x and y is about 1;
• x is a real number ranging from about 0.1 to about 0.9;
• y is a real number ranging about 0.1 to about 0.9;
• the sum of i and j is about 1;
• and i and j are a real number ranging from about 0 to about 1, respectively (j≠0),
• wherein R1 is one or more selected from the group consisting of functional groups represented by the following Formula 3;
• R2 is one or more selected from the group consisting of photo-reactive functional groups represented by the following Formula 4;
• k is an integer ranging about 0 to about 3;
• and if R1 is plural, they are identical to or different from each other,
• wherein m is an integer ranging from about 1 to about 12,