Neomax Materials Co., Ltd.

Takayuki Furujo

Masaharu Yamamoto

Provided is an airtightly sealing cap, by which a use quantity of Au is reduced in a soldering material for sealing a miniaturized electronic component storing package. An airtightly sealing cap () is used for an electronic component storing package () which includes an electronic component storing member () for storing an electronic component (). The airtightly sealing cap is provided with a base material (); a base layer () which is formed on the surface of the base material and contains Ni; and a soldering material layer (), which is formed on the base layer, has a thickness of 10 &#x3bc;m or less and composed of Au and Sn. The content percentage of Au in the soldering material layer is 43 mass % or more but not more than 64 mass %.

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Izumi, Japan

Takayuki Furujo