Patent ID: 8794498

Claim:
An electronic component device, comprising: a first component on which a first conductor film including a first high melting point metal is provided; a second component on which a second conductor film including a second high melting point metal is provided; and a bonding portion arranged to bond the first conductor film and the second conductor film to each other; wherein the bonding portion includes a first intermetallic compound layer including an intermetallic compound of the first high melting point metal and a low melting point metal having a melting point less than that of the first and second high melting point metals, a second intermetallic compound layer including an intermetallic compound of the second high melting point metal and the low melting point metal, and a high melting point metal layer that is arranged between the first and second intermetallic compound layers and that is softer than the intermetallic compounds of the first and second intermetallic compound layers and that includes one of the first and second high melting point metals; the first high melting point metal of the first conductor film, the second high melting point metal of the second conductor film, and the one of the first and second high melting point metals of the high melting point metal layer include Cu as a main component; the low melting point metal includes Sn as a main component; the intermetallic compounds of the first and second intermetallic compound layers are Cu 3 Sn; the high melting point metal layer that is arranged between the first and second intermetallic compound layers does not include any non-uniformities or defects and is formed by deposition, sputtering, or metal plating; the first component is a main substrate on one principal surface of which an electronic circuit formation portion and a first sealing frame surrounding the electronic circuit formation portion are provided; the second component is a cap substrate on one principal surface of which a second sealing frame to be bonded to the first sealing frame is provided; and the first sealing frame is defined by the first conductor film and the second sealing frame is defined by the second conductor film.