To attain a more reliable prevention of an electric shock by checking whether the earth states for two circuit boards are good. Thus, the organic insulating film can be vertically processed while the bow amplitude and the corner loss amount of the hard mask are decreased. The wireless communication may also include transmission of test results to a tester. The deep element isolation region has an approximately constant width which allows the complex element isolation region to be wide. A retention member restrains the LED assembly from moving in an axial direction relative to the heat conducting portion. The apparatus includes a table, a dispenser to supply the liquid photocurable resin onto the table, a recoater to apply the photocurable resin, and a controller to slow down a moving speed of the recoater based on a moving distance of the recoater during application operation of the recoater.