| abstract |
Provided is a detachable layer-forming composition which, for example, contains an organic solvent and a polyamic acid, both ends of which are derived from tetracarboxylic acid and sealed with an aromatic monoamine, such as the polyamic acid represented by this formula. n n n n n n n n n n (In the formula, X represents a tetravalent aromatic group, Y represents a divalent aromatic group, R 1 -R 5 each independently represent a hydrogen atom, a C1-10 alkyl group, or a C6-20 aryl group, and m is a natural number.) |