Patent ID: 8472647

Claim:
A surface mountable package comprising: a base and a cover with a cavity defined by the base and the cover; an acoustic transducer unit being attached to a surface formed on one of the base and the cover, the acoustic transducer unit residing within the cavity, one of the base and the cover defining an acoustic port facing the acoustic transducer unit for allowing sound waves to reach the acoustic transducer unit; a readout circuit unit and a filter capacitance both received in the cavity and both electrical connection with the acoustic transducer by a plurality of circuit traces; the cover comprising a first metal ring formed on an inner side thereof to enclose the acoustic transducer unit, the readout circuit unit and the filter capacitance; the base comprising a corresponding second metal ring to press against the first metal ring in order to form a metal shielding area; a first metal connecting path formed adjacent to the cavity and being electrically connected to the metal shielding area; a second metal connecting path being electrically connected to the acoustic transducer unit, the readout circuit unit and the filter capacitance; a pair of first surface mountable metal electrodes attached to the base and the cover, respectively, in condition that the pair of first surface mountable metal electrodes are electrically connected to the first metal connecting path and cover opposite ends of the first metal connecting path; and a pair of second surface mountable metal electrodes attached to the base and the cover, respectively, in condition that the pair of second surface mountable metal electrodes are electrically connected to the second metal connecting path and cover opposite ends of the second metal connecting path.