A semiconductor element which comprises a semiconductor layer and an insulating layer that is adjacent to the semiconductor layer, and wherein the insulating layer is formed of a crosslinked product of a polymer compound that has a repeating unit (IA) represented by general formula (IA) and a repeating unit (IB) represented by general formula (IB); and an insulating layer-forming composition for forming an insulating layer of a semiconductor element, which contains a polymer compound that has the repeating structures (IA) and (IB). (In general formulae, each of R1a and R1b independently represents a hydrogen atom, a halogen atom or an alkyl group; each of L1a, L2a and L1b independently represents a single bond or a linking group; X represents a crosslinkable group; YB represents a decomposable group or a hydrogen atom; each of m1a and m2a independently represents an integer of 1-5; and each * represents a bonding position of the repeating units.)
一种半导体元件,它包括半导体层和与半导体层相邻的绝缘层,其中绝缘层由具有通式(IA)代表的重复单元(IA)和通式(IB)代表的重复单元(IB)的聚合物化合物的交联产物形成;以及一种用于形成半导体元件绝缘层的绝缘层形成组合物,它含有具有重复结构(IA)和(IB)的聚合物化合物。(通式中,R1a和R1b各自独立地代表氢原子、卤原子或烷基;L1a、
L2a和L1b各自独立地代表单键或连接基团;X代表可交联基团;YB代表可分解基团或氢原子;m1a和m2a各自独立地代表1-5的整数;每个*代表重复单元的键合位置)。