SUBSTRATE AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To increase an airtightness surrounding a penetrative electrode.

SOLUTION: A substrate 101 is provided with a housing part 101C defined by a base 101A for packaging a luminescent element 102 and a wall part 101B erecting on the base 101A. A package 100 is configured in such a way that an upper end of the wall part 101B formed so as to surround a periphery of the housing part 101C is jointed to a cover 103 to seal the luminescent element 102. A sealing structure 130 is composed of: a recessed part 140 formed on a surface on the rear side of the base 101A; an adherent layer 150 laminated on a surface of this recessed part 140; a feed layer 160 laminated on the adherent layer 150, and an electrode layer 170 laminated on a surface of the feed layer 160. The recessed part 140 has: a first cavity 180 formed at a location apart radially from an outer periphery of a penetrative electrode 107 or an inner wall of a through hole 120; and a second cavity 190 formed at a location far apart toward the more outer side than the first cavity 180.

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