Process for producing a copper-containing aqueous solution, in which a copper mass is dissolved in the presence of an oxidant in an aqueous leach liquor containing monoethanolamine and 2CO3. The controller accurately limits an upper value of the output voltage during a light load condition, and rapidly reduces the value of the output voltage to a desired value. In a thin film transistor using an oxide semiconductor layer, by forming a semiconductor layer having higher electrical conductivity and a smaller thickness than the oxide semiconductor layer between the oxide semiconductor layer and a gate insulating layer, field effect mobility of the thin film transistor can be improved, and increase in off current can be suppressed. The first coordinate and the second coordinate are used as the reference for the first position. Another object is to present an adhesive sheet for laser processing preferably used in the method of manufacturing a laser processed part.