Silicon-containing copolymer and photosensitive resin composition containing the same

A silicon-containing copolymer comprising a repeating unit represented by formula (I), a repeating unit represented by formula (VI), a repeating unit represented by a formula selected from the group consisting of formulae (II), (III), (IV), (V), and mixtures thereof:

• 12
• wherein
• R7 is selected from the group consisting of hydrogen, C1-20 linear and branched alkyl, (C1-6alkoxy) (C1-10alkyl), (C3-20cycloalkyl) (C0-6alkyl), (C3-20polycycloalkyl) (C0-6alkyl), and (C3-10heterocyclic group) (C0-6alkyl),
• R1, R2, and R3 are the same or different and are independently selected from the group consisting of hydrogen, C1-20 linear and branched alkyl, (C1-6alkoxy) (C1-10alkyl), (C3-20cycloalkyl) (C0-6alkyl), (C3-20polycycloalkyl) (C0-6alkyl), (C3-10heterocyclic group) (C0-6alkyl), and a silicon-containing group, wherein the silicon-containing group is C3-50 silyl or (C3-50silyl) (C1-9alkyl), and the silyl can be substituted with an alkoxy substituent, and wherein at least one of R1 and R2 is the silicon-containing group,
• R4, R5, and R6 are the same or different and are independently the silicon-containing group, and
• the moles of formula (I), the moles of formula (VI), and the sum of the moles of formulae (II), (III), (IV), and (V) are in a ratio of 1:0.05-0.8:0.2-0.95.