Patent ID: 6615659
Filing Date: 2003-09-09
Classification: G01N

Abstract:
A humidity sensor device comprising an insulating substrate, a pair of opposed electrodes disposed on the substrate to define a gap therebetween, and a humidity sensitive thin film lying on the gap,said humidity sensitive thin film comprising a copolymer of at least one monomer of the following formula (1) with at least one monomer of the following formula (2): â€ƒwherein A11 is a divalent group, each of R11, R12, R13 and R14 which may be the same or different is an alkyl group, each of Y11 and Y12 which may be the same or different is a monovalent group terminated with an ethylenically unsaturated reactive group, any two or more of R11 to R14, Y11, Y12, A11 and portions thereof adjoining the nitrogen (N) atom may bond together to form a ring with the nitrogen (N) atom, and each of X11âˆ’ and X12âˆ’ which may be the same or different is an anion, â€ƒwherein each of A and B is a divalent group, each of Y1, Y2, Y3, Y4, Y5 and Y6 which may be the same or different is a monovalent group, at least one of Y's is a group terminated with an ethylenically unsaturated reactive group, any two or more of Y1, Y2, Y3, Y4, Y5, A and portions thereof adjoining the nitrogen (N) atom or any two or more of Y4, Y5, Y6, B and portions thereof adjoining the nitrogen (N) atom may bond together to form a ring with the nitrogen (N) atom, each of X1âˆ’ and X2âˆ’ which may be the same or different is an anion, and n is a number of 2 to 5,000.