Implantable living tissue stimulator - includes coil for current induced by external alternating magnetic field and has hermetic metal container

摘要

All the stimulator circuit components except for one or more electrode leads are hermitically sealed within a hermetic container formed of a biocompatible metal of a thickness T, and having an electrical resistivity p, where T/p = 0.03, T being in mils. and p in microhm-cm. The metal thickness T is not more than 5 mils and preferably not more than 3 mils, and the electrical resistivity p is not less than 75 microhm-cm and preferably not less than 100 microhm-cm, in order to reduce the portion of power induced in the stimulator by the magnetic field which is dissipated as heat in the hermetic metal container.