Kyocera Corporation

Kazuhiro Okamoto

Youji Furukubo

Sentarou Yamamoto

Kazuki Nishimoto

Kouichirou Sugai

Yuhei Matsumoto

A joint body of the present disclosure includes a substrate including a base member having insulating properties and a metal layer positioned on a first main surface of the base member, a metal joint layer, and a metal member. The metal joint layer is positioned between the metal layer and the metal member of the substrate. The metal joint layer includes a nickel layer, a solder layer, and a composite layer containing a mix of nickel and solder. The nickel layer, the composite layer, and the solder layer are positioned in this order from the metal layer side to the metal member side. The nickel in the composite layer extends from the nickel layer in the thickness direction and forms protrusions and recesses.

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Kirishima, Japan

Kazuhiro Okamoto