Patent ID: 6613493
Filing Date: 2003-09-02
Classification: G03F,Y10S

Abstract:
A photoresist polymer comprising polymerization repeating unit selected from the group consisting of compounds of Chemical Formula 1a and Chemical Formula 1b: wherein, R1 is an acid labile protecting group; the ratio a+b:c+d falls within the following range: 0Ëœ80 mol %:20Ëœ100 mol %; the ratio a+c:b+d falls within the following range: 40Ëœ80 mol %:20Ëœ60 mol %; the ratio e+f:g+h falls within the following range: 0Ëœ80 mol %:20Ëœ100 mol %; the ratio e+g:f+h falls within the following range: 40Ëœ80 mol %:20Ëœ60 mol %; the weight average molecular weight of Chemical Formula 1a ranges from about 6000 to about 30000; and the weight average molecular weight of Chemical Formula 1b ranges from about 1200 to about 10000.