Patent ID: 7504126

Claim:
A plasma display panel manufacturing method in which a protective layer forming procedure for forming a protective layer on a surface of a substrate is performed, the method comprising: in the protective layer forming procedure, a forming step of forming the protected layer from magnesium oxide; a step of subjecting the protective layer to one of (a) a heating process in an atmosphere that includes oxygen and (b) a plasma discharge process in an atmosphere that includes oxygen; and a step of subjecting the protective layer to one of (a) a heating process in an atmosphere that includes hydrogen, and (b) a plasma discharge in an atmosphere that includes hydrogen, wherein the forming step includes composing the protective layer principally of magnesium oxide and including a substance or a structure that enables a creation of a first energy level in an area of a forbidden band, the area being in a vicinity of a conduction band, and includes a substance or a structure that enables a creation of a second energy level in another area in the forbidden band, the other area being in a vicinity of a valence band.