SMD TYPE SQUARE CONDENSER MICROPHONE ASSEMBLY AND METHOD OF MAKING THE SAME

摘要

The present invention relates to a surface-mount type quadrilateral capacitor microphone assembly and a manufacturing method thereof which are able to simplify processes and reduce a failure rate by a quadrilateral microphone structure applying an insulating coating case and are also able to improve a gain by increasing an internal sound chamber. In the assembly of the present invention, a case assembly adheres to a PCB assembly by a conductive means. In an adhesive type capacitor microphone in which the case assembly and the PCB assembly are sealed by adhesive, the case assembly comprises: a quadrilateral case (110) which has a sound hole formed in the bottom surface in a rectangular container shape with an open side and is coated with an insulating material inside four side walls; a vibration plate (120) which vibrates by a sound pressure which comes in through the sound hole by being mounted on the bottom surface of the quadrilateral case; a first spacer (132) which forms an interval between the vibration plate and a back electrode plate by being mounted on the vibration plate; the back electrode plate (140) in which a back electret is formed; and a structure support frame (150) to support a shape of the case assembly when curling the case. By the forementioned composition, the assembly of the present invention has an end of the quadrilateral case curled after stacking the vibration plate (120), the first spacer (132), the back electrode plate (140), and the structure support frame (150) in the quadrilateral case (110) in order.