SEALING BOARD, MANUFACTURING METHOD FOR IT, DISPLAY DEVICE AND ELECTRONIC DEVICE

摘要

PROBLEM TO BE SOLVED: To reduce the weight of a sealing board without shortage of strength and any increase in quantity of transmitting moisture and oxygen. SOLUTION: This sealing board has a base plate 10 where a recess 12 is formed and a covering layer 20 formed at the base of the recess 12. The covering layer 20 is formed thinner than the depth of the recess 12 and formed of a material having a smaller specific gravity than that of the base plate 10. The base of the recess 12 is a rough surface, and the covering layer 20 is formed in close contact with the base. COPYRIGHT: (C)2003,JPO