A rate-responsive implantable stimulation device having a miniature hybrid-mountable accelerometer-based sensor and method of fabrication

摘要

A miniature, hybrid-mountable, accelerometer-based, physical activity sensor (50) for use with a rate-responsive implantable stimulation device is provided. The physical activity sensor (50) is constructed as a cantilever beam (52) having a film (102,104) of a piezoelectric polymer adhered to each surface of an electrically conductive substrate (100). The piezoelectric films (102,104) are highly resistant to fracturing during manufacture and in use, and they provide a strong output signal when stressed in response to bodily accelerations. A pair of electrically conductive supports (54,56) serve to anchor the physical activity sensor (50) to a substrate (76) and deliver the output signal provided by the sensor (50) to circuitry (110) within the rate-responsive implantable stimulation device. The physical activity sensor is adapted to be mounted directly to conductive traces (72,74) on a suitable substrate, such as an implantable stimulation device hybrid (76). IMAGE