Abstract: A diaphragm for pressure transducers which will be suitable for measuring small differentials is constructed by perforating, either partially or completely, the diaphragm material. The resulting diaphragm will require very small pressure differentials to obtain full scale deflection as compared with an unperforated diaphragm. The ideal configuration for the perforations is a series of convoluted slots etched completely through the diaphragm material from an inner radius, which may define one plate of a capacitive type transducer, to an outer radius near the periphery of the diaphragm. When the diaphragm is etched all the way through, it is covered with a thin plastic film, which may be cemented to the diaphragm or just sealed to it at its edges.