| abstract |
PROBLEM TO BE SOLVED: To provide a moisture-sensitive element having no problem of heat resistance and water resistance. [Solution] A moisture-sensitive element having a plurality of electrodes formed on a support substrate and a polyimide film as a sensor film formed in contact with the electrodes, wherein the polyimide film is a structural unit represented by the following general formula: Is a moisture-sensitive element. Here, Ar 1 represents a tetravalent group having at least one or more aromatic rings, and D 1 is selected from O, CH 2 , C (CH 3 ) 2 , C (CF 3 ) 2 and S. X represents a hydrogen atom, an alkali metal, ammonium or a quaternary amine. Embedded image [Selection diagram] None |