A surface mountable condenser microphone (1) comprising a diaphragm (7) spaced by a spacer from a conductive capacitor layer (14), which is arranged on a surface of a back plate (15), wherein the back plate (15) is realized by a ceramic plate that carries the conductive capacitor layer (14) and isolated on another surface area of the same side of the back plate (15) a spacer layer (23) that projects over the conductive capacitor layer (14) and forms the spacer.