Patent ID: 8319112

Claim:
A circuit board assembly comprising: a circuit board having an outer surface, the outer surface comprising a plurality of discrete electrical components; a dielectric coating overlying at least a portion of the outer surface of the circuit board and at least one of the plurality of discrete electrical components, the dielectric coating entirely covering the at least one discrete electrical component, the dielectric coating comprising: a first dielectric layer made of alumina, the first dielectric layer having a thickness that is in the range of approximately 50 to 2000 angstroms; and a second dielectric layer overlying the first dielectric layer, the second dielectric layer having a thickness in the range of approximately 50 to 2000 angstroms; a domed lid enclosure disposed over at least one of the plurality of discrete electrical components; a third dielectric layer made of alumina overlying the domed lid enclosure, the third dielectric layer having a thickness that is in the range of approximately 50 to 2000 angstroms; and a fourth dielectric layer overlying the third dielectric layer, the fourth dielectric layer being thicker than the third dielectric layer and the second dielectric layer.