Kyocera Corporation

Takeyuki Arai

Yoshio Ohashi

Minoru Nakasuga

Shodai Takayoshi

Tetsurou Nakamoto

A resistor includes materials including copper, nickel, and lanthanum boride. A content of the materials is 40% by mass or more with respect to a total material content of the resistor. The copper includes copper particles having a particle diameter of 2.5 &#x3bc;m or more. In addition, a circuit board includes a substrate, the resistor on the substrate, a metal layer on the resistor and a glass layer on the resistor. Further, an electronic device includes the circuit board and an electronic component on the metal layer.

Resistor, circuit board, and electronic device

There are provided a light-emitting element mounting substrate having high bonding strength between a substrate main body and a metal portion, and a light-emitting device having high bonding strength between the substrate main body and the metal portion and high reliability. A light-emitting element mounting substrate includes a substrate main body () formed of a ceramic sintered body; and a silver-containing metal portion (), a silver-containing region () existing in a portion of the substrate main body which faces the metal portion across a bonding portion bonding the substrate main body and the silver-containing metal portion. Accordingly, it is possible to increase bonding strength between the substrate main body () and the metal portion ().

Growing community of inventors

Satsumasendai, Japan

Takeyuki Arai