A diagnosis device calculates a lean-direction responsiveness characteristic and a rich-direction responsiveness characteristic of the exhaust gas sensor. The plasma display panel includes a transparent electrode; a metal bus electrode; a first light shielding layer formed between the transparent electrode and the metal bus electrode on each discharge cell; a second light shielding layer formed between the adjacent discharge cells. The body region has an impurity profile in which the concentration reaches a maximum value near the surface and decreases with distance from the surface. A reset means turns off the transistor while a waveform shaping circuit is in operation. The ceramic precursor is then reacted so as to convert it to a ceramic. An edge of the stop plate faces the rock shaft and has a jaw opening defined by upper and lower jaws that at least partially encompasses the rock shaft.