TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The processing additive is diiodooctane, chloronaphthalene, octanedithiol, 1,6-dithiolhexane, 1,6-dichlorohexane, 1,6-dibromohexane, 1,6-diiodohexane, octadinitrile, 1,8-dithioloctane, 1,8-dichlorooctane, 1,8-dibromooctane, 1,8-diiodooctane, decanedinitrile, 1,10-dithioldecane, 1,8-dichlorodecane, 1,8-dibromodecane, 1,8-diiododecane, dodecanedinitrile, or chloronaphthalene.    TECHNOLOGY FOCUS - POLYMERS - Preferred Method: The processing further comprises: adding (100) the processing additive to a solution in which the conjugated polymer is dissolved; depositing (106) the solution, after the additive is added, onto a dielectric layer on the substrate, where the solution forms a film on the dielectric layer on the substrate; annealing (108) the film; and fabricating the film into the active region. The processing comprises adding the processing additive to a solution in which the conjugated polymer is dissolved. The conjugated polymer is dissolved in a solvent to form the solution. Preferred Components: The conjugated polymer has band gap of 1.7-0.5, preferably less than 1.7 electron volts (eV). The processed conjugated polymer comprises a composition having a surface roughness in the active region increased by a factor of at least 2, as compared to a surface roughness of no more than 0.55 nm over an area of 5 mu m by 5 mu m in a control active region comprising the conjugated polymer processed without the additive. The processing additive is present at 0.01-10 wt.% of additive/wt. of the solvent. The additive has a higher boiling point than a boiling point of the solvent. The conjugated polymer has a lower solubility in the processing additive than in the solvent. The conjugated polymer is poly(4-(4,4-bis(2-ethylhexyl)-4H-silolo(3,2-b:4,5-b')dithiophen-2-yl)-(1,2,5)thiadiazolo(3,4-c)pyridine, poly(4-(4,4-dihexadecyl-4H-cyclopenta(1,2-b:5,4-b')dithiophen-2-yl)-(1,2,5)thiadiazolo(3,4-c)pyridine or any of the conjugated polymers disclosed in figure 2(b) of the specification. The single component conjugated polymer is a single type of polymer processed in a single solvent. EXAMPLE - No suitable example given.