NOVELTY - A polymer comprising repeating unit contains ammonium/alkylene ether is new.    USE - For preparing electrically conductive layer and electrically conductive film used in the article selected from light-emitting diodes, light emitting diode displays, liquid crystal displays, electronic paper, touchscreens, diode lasers, photodetectors, photoconductive cells, photoresistors, photo switches, phototransistors, phototubes, IR detectors, photovoltaic devices, solar cells, transistors, diodes, memory storage devices, antistatic films, biosensors, electrochromic devices, solid electrolyte capacitors, energy storage devices, electromagnetic wave shielding films, window de-icers, heat reflectors, architectural materials, electro-optic modulators, microresonators, interferometers, optical switches, directional couplers and multiplexers (claimed).    ADVANTAGE - The polymer is stable at high temperature, and has prolonged electrical conductive stability.    DETAILED DESCRIPTION - A polymer comprising repeating unit contains ammonium/alkylene ether of formula -(A(R1))n- (I) and -(B'(R2))n- (II) is new.    A and B'=phenylene, phenylene vinylene, pyrrolylene, pyrrolylene vinylene, thienylene, thienylene vinylene, fluorenylene, fluorenylene vinylene, furanylene, furanylene vinylene, phenothiazinylene, phenothiazinylene vinylene, phenazinylene, phenazinylene vinylene, phenoxazinylene or phenoxazinylene vinylene (all optionally substituted by hydroxyl, alkyl, alkenyl, alkynyl, alkanoyl, alkanoylamino, alkenoyl, alkynoyl, alkoxy, alkoxycarbonyl, alkoxycarbonylamino, alkylamino, alkylaminocarbonyl, dialkylaminocarbonyl, alkylsulfonyl, alkylsulfinyl, sulfonyl amino alkyl, alkylsulfonylaminocarbonyl, aminoalkyl, cyanoalkyl, halogen, haloalkyl, haloalkenyl, haloalkynyl, haloalkanoyl, haloalkenoyl, haloalkynoyl, haloalkoxy, haloalkoxycarbonyl, hydroxyalkyl, oxoalkyl, cycloalkyl, cycloalkenyl, cycloalkanoyl, cycloalkenoyl, cycloalkoxy, cycloalkoxycarbonyl, aryl, arylene, heterocycle, heterocyclyl, heteroaryl, heteroarylene, arylalkyl, heteroarylalkyl, arylalkanoyl, heteroarylalkanoyl, arylalkenoyl, heteroarylalkenoyl, arylalkynoyl, heteroarylalkynoyl, arylalkoxy, heteroarylalkoxy, aryloxy, heteroaryloxy, aryloxycarbonyl, heteroarylxoycarbonyl, arylalkoxycarbonyl, heteroarylalkoxycarbonyl, alkylhio, alkylthioalkyl, arylthio, arylsulfonyl or arylsulfonyl;or    R1+R2=alkylene or alkenylene chain completing a 3, 4, 5, 6, or 7-membered aromatic or alicyclic ring (optionally substituted), where the ring optionally includes divalent nitrogen, sulfur or oxygen atoms;    R1=-C(R3)(R4)(R5);    R2=-C(R6)(R7)(R8);    R3, R4, R5, R6, R7 and R8=hydrogen, alkyl, ammonium or -(K'-O)d-R9;    K'=1-2C alkylene;    d=1-3;    R9=hydroxyl, carboxylic acid, sulfonic acid, or a straight or branched alkyl (which is optionally substituted with hydroxyl);    n=100-1000.    Provided that at least one of R3, R4, R5, R6, R7 and R8 is ammonium or -(K'-O)d-R9; or R1 and R2 are not same at a time. INDEPENDENT CLAIMS are included for the following:    (1) a composition comprising the polymer;    (2) an electrically conductive layer and electrically conductive film formed from the composition; and    (3) an article comprising at least one electrically conductive layer.