TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Gas: The inert gas is nitrogen or argon.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: Lithium chloride, 2,5-dibromo-1,4-di-iodobenzene, palladium catalyst, cuprous chloride, 3-bromothiophene tin compound and solvent are added under inert gas atmosphere, stirred, heated, cooled, and the resulting solids are filtered to obtain 2,2'-(2,5-dibromo-1,4-phenylene)bis(3-bromothiophene) crude product. 2,2'-(2,5-Dibromo-1,4-phenylene) bis(3-bromothiophene) crude product, sodium tert-butoxide, 2,2'-bis (diphenylphosphino)-1,1'-binaphthyl, alkyl amine and palladium catalyst are added, stirred, cooled, filtered, organic phase is washed with saturated brine, dried, filtered, and purified to obtain N-alkylated indole-benzothiophene derivative. N-alkylated indole-benzothiophene derivative is dissolved in tetrahydrofuran or N,N-dimethylformamide, cooled, N-bromosuccinimide is added, reacted, and purified by column chromatography to obtain 6,15-dibromo-5,14-dithia-9,18-diazapentacyclo(10.6.0.03,10.04,8.013,17)octadeca-1,3(10),4(8),6,11,13(17),15-heptaene (A). Preferred Composition: The molar ratio of compound (A) and compound (B) is 1:1.1-1.5. The catalyst is tetrakis(triphenylphosphine)palladium, or bis(triphenylphosphine)palladium(II) dichloride. The molar ratio of catalyst to compound (A) is 0.0001-0.05:1. The catalyst is a mixture of organic palladium ligand and organic phosphine ligand in a molar ratio of 1:2-20. The organic palladium ligand is tris (dibenzylideneacetone)dipalladium (0). The organic phosphine ligand is tri (o-methylphenyl) phosphine. The organic solvent is tetrahydrofuran, N,N-dimethylformamide, or toluene. The molar ratio of 2,5-dibromo-1,4-di-iodobenzene and 3-bromothiophene tin compound is 1:1.1-1.5. The molar ratio of 2,5-dibromo-1,4-di-iodobenzene, lithium chloride and cuprous chloride is 1:6-1:6.2, preferably 1:5-1:5.2. The molar ratio of 2,2'-(2,5-dibromo-1,4-phenylene) bis(3-bromothiophene) and alkyl amine is 1:3-4.    TECHNOLOGY FOCUS - POLYMERS - Preparation (claimed): 6,15-Dibromo-5,14-dithia-9,18-diazapentacyclo(10.6.0.03,10.04,8.013,17)octadeca-1,3(10),4(8),6,11,13(17),15-heptaene (A) of formula (II) and 2,5-bis-(5-trimethylstannanyl-thiophen-2-yl)-thiazolo(5,4-d)thiazole (B) of formula (III) are added to organic solvent in inert gas atmosphere, catalyst is added to the resulting mixture, dissolved, and Stille coupling reaction is carried out at 60-120 degrees C for 24-72 hours. The resulting mixture is separated, and purified to obtain conjugated polymer (I). Preferred Process: The separation and purification process involves evaporating reaction solution, dripping methanol in the obtained precipitate, filtering, washing with methanol, drying, passing dried mixture to alumina column chromatography, eluting using chloroform, filtering, and subjecting resulting solid to Soxhlet extraction with acetone.