| 摘要 |
PROBLEM TO BE SOLVED: To provide a hermetic seal package capable of improving the reliability of hermetic seal without applying any complicated processing on a seal ring while preventing the rise of molten solder to a welded part. SOLUTION: The structure of cross section of the seal ring 1 is provided with an L-shape configuration wherein the upper part 11 as a projected unit is projected upward from the inside end of a lower part 12. The upper part 11 is smaller than the lower part 12 in the width thereof. Accordingly, heat generated upon welding the upper part 11 is hardly transferred to the lower part 12 and, therefore, solder 4 provided on the lower part 12 is prevented from remelting. COPYRIGHT: (C)2005,JPO&NCIPI
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