Patent ID: 6693239
Filing Date: 2004-02-17
Classification: H01L

Abstract:
An over-molded circuit board assembly comprising:a circuit board having a first surface and an oppositely-disposed second surface; a surface-mount circuit device attached to the first surface of the circuit board with solder bump connections, the circuit device being spaced above the first surface of the circuit board by the solder bump connections so as to define a gap therebetween; and at least one cavity defined in the circuit board beneath the circuit device, each of the at least one cavity communicating with the gap between the circuit board and the circuit device and being closed off from the second surface of the circuit board; and a molding material that completely fills the gap between the circuit board and the circuit device and encapsulates the circuit device and the circuit board at the first and second surfaces thereof, wherein the at least one cavity contains pressurized gas.