To increase productivity of organic thin-film transistors, in an organic
thin-film transistor manufacturing equipment, a liquid containing at
least either one of a wiring material and a semiconductor material is
coated on a substrate to form a number of organic thin-film transistors.
Substrate carrying means carry the substrate. The substrate is heated by
a first heating means, and the temperature of the substrate is controlled
by a controller. The liquid containing at least either one of the wiring
material and the semiconductor material is heated by a second heating
means, and the temperature of this liquid is controlled also by the
controller.