abstract |
The present invention relates to a composition having a change in solubility, the solubility of which varies depending on the application of heat, light, or both heat and light, and the composition whose solubility changes includes a polymer or oligomer (A), And a starter (B), the polymer or oligomer (A) having a repeating unit having a hole transporting property and having a thienyl group, the thienyl group having a substituent. |