An information display apparatus includes a display, a receiver, a memory, and a display controller. In the computing mode, the application processor is the master processor. Then, the gate insulating film is heat treated in an atmosphere containing water. The catheter is manufactured with calibration markings, most likely equally spaced, and a radiopaque line along its length to enhance the maneuvering and the positioning thereof in the patient so that the distal tip of the catheter could be accurately positioned to the desired location of the patient’s trachealbronchial tree.