Patent ID: 6762537
Filing Date: 2004-07-13
Classification: H03H

Abstract:
A piezoelectric device, comprising:a semiconductor integrated circuit; and a piezoelectric resonator element, the semiconductor integrated circuit and the piezoelectric resonator element being included in a package, a plurality of bumps being formed at two opposing sides of an active element surface of the semiconductor integrated circuit, the semiconductor integrated circuit being mounted in a center of an opening formed in a center of a base, and the semiconductor integrated circuit being connected to an input/output electrode pattern through the plurality of bumps by ultrasonic bonding, each of the plurality of bumps formed on the semiconductor integrated circuit being shaped to have two levels, a first level having a diameter 0.8 to 0.9 times and a second level having a diameter 0.4 to 0.45 times the length of an opening in a pad provided on the active element surface of the semiconductor integrated circuit.