Patent ID: 8651363

Claim:
A bonding method for bonding objects to be bonded, each object having a bonding portion formed of metal and a bonding surface, and one object of the objects having the bonding portion formed of a plating having a vertical wall perpendicular to the bonding surface of the one object, the vertical wall surrounding a space on the bonding surface of the one object, the bonding method comprising the following steps: a) removing impurities in a chamber by evacuating to reduce pressure while both of the objects to be bonded are arranged in the chamber; b) after the step a), surface-activating both of the bonding portions with an energy wave which is an atom beam, an ion beam, or a plasma; and c) after the step b), bonding the objects to be bonded together in a solid phase caused by an appearance of a new surface on each of the bonding portions readhered with an adhering substance formed of organic substances or art oxide film by contacting the bonding portions of the objects to be bonded with each other and pressing the bonding portions under low-temperature heating at room temperature to 180° C. or less so that the space is enclosed by following: 1) the vertical wall, 2) the bonding surface of the one object and 3) the metal bonding portion of the other object, while bonding of the objects is performed.