TECHNOLOGY FOCUS - ELECTRONICS - Preferred Method: The electrically conductive layer or film is formed by a wet process comprising spin coating, gravure coating, curtain coating, dip coating, slot-die coating, spray coating, continuous nozzle coating, doctor blade coating, ink-jet printing, gravure printing or screen printing. The UV light has a wavelength of 150-400 nm. The process comprises exposing the substrate to UV light through a photomask; and washing the substrate by using a solvent comprising water and/or alcohol. The electrically conductive layer in the article is patterned.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The repeating unit (I) has a structure of formula (III) or (IV), and the repeating unit (II) has a structure of formula (V), where the ratio of the repeating unit (III) or (IV) and the repeating unit (V) is 1:0.1-1:0.5, and the copolymer has a degree of polymerization of 100-1000. The repeating unit (III) (where X is S) is 3,4-ethylenedioxythiophene and the copolymer is doped with poly(styrenesulfonate).X1-X3 = NH, N, O, S or P; eitherR2, R2a, R3, R3a = H, OH, alkyl, alkenyl, alkynyl, alkanoyl, alkanoylamino, alkenoyl, alkynoyl, alkoxy, alkoxycarbonyl, alkoxycarbonylamino, alkylamino, alkylaminocarbonyl, dialkylaminocarbonyl, alkylsulfonyl, alkylsulfinyl, sulfonylaminoalkyl, alkylsulfonylaminocarbonyl, aminoalkyl, cyanoalkyl, halo, 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, arylalkoxy, carbonyl, heteroarylalkoxycarbonyl, alkylthio, alkylthioalkyl, arylthio, arylsulfonyl or arylsulfinyl; orR2R21, R3R3a = alkylene or alkenylene chain completing a 3-7-membered aryl or alicyclic ring optionally including one or more divalent N, S or O atoms and the substituents are optionally substituted;R4, R4a = H, OH, alkyl, alkenyl, alkynyl, alkanoyl, alkanoylamino, alkenoyl, alkynoyl, alkoxy, alkoxycarbonyl, alkoxycarbonylamino, alkylamino, alkylaminocarbonyl, dialkylaminocarbonyl, alkylsulfonyl, alkylsulfinyl, sulfonylaminoalkyl, alkylsulfonylaminocarbonyl, aminoalkyl, cyanoalkyl, halo, 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, arylalkoxy, carbonyl, heteroarylalkoxycarbonyl, alkylthio, alkylthioalkyl, arylthio, arylsulfonyl, arylsulfinyl, Y1 or L-Y1, with the proviso that at least one of R4 and R4a is Y1 or L-Y1;Y1 = photoreactive group, preferably cinnamoyl, chalcone, coumarin, maleimide, anthracenic or pyrimidine group (all optionally substituted with at least one substituent having at least one ionic moiety); andL = alkylene, alkylene oxide, alkenylene, alkenylene oxide or alkynylene (all optionally substituted with alkyl or alkoxy).Preferred Composition: The composition comprises a solvent. EXAMPLE - No suitable example given.