Patent ID: 8216884

Claim:
A method of production of an electronic device having mounted thereon a microelectromechanical system element, which comprises the steps of: forming a micromachine component and electronic component for operation of said micromachine component on a substrate to form said system element; forming a lid provided with conductor-filled vias formed passing through the lid in a thickness direction thereof, and wiring patterns connected with an end surface of the vias; bonding to said substrate said lid covering an active surface of said substrate to define an operating space for said micromachine component and electrically connecting, via bumps, electrodes of said substrate and the wiring patterns of said lid at a bonded part of said substrate and said lid; and forming, at said substrate, said lid, a continuous ultrasonic bonded part in contact with at an outer periphery of said operating space side of said substrate and said lid without interruption.