| abstract |
A non-thermoplastic polyimide having a non-thermoplastic polyimide layer, which constitutes the non-thermoplastic polyimide layer, is composed of 3,3 ', 4,4'- with respect to 100 molar parts of the tetracarboxylic acid residue. BPDA residue derived from biphenyl tetracarboxylic acid dianhydride (BPDA) and at least one TAHQ residue derived from 1,4-phenylene bis (trimellitic acid monoester) dianhydride (TAHQ), and pyro 80 moles in total of at least one PMDA residue derived from mellitic dianhydride (PMDA) and at least one NTCDA residue derived from 2,3,6,7-naphthalenetetracarboxylic acid dianhydride (NTCDA) It is preferable to contain part or more, and it is preferable that a dielectric loss tangent (Df) is 0.004 or less. |