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Implantable cardiac-stimulator with flat capacitor

  • US 5,370,663 A
  • Filed: 08/12/1993
  • Issued: 12/06/1994
  • Est. Priority Date: 08/12/1993
  • Status: Expired due to Term
First Claim
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1. In an implantable cardiac stimulator including an electrical contact, a battery, an energy storage capacitor and control circuitry electrically connected to said contact, battery and capacitor, in which said battery, capacitor and control circuitry are disposed within a housing having mutually orthogonal thickness, width and length axes, said housing having a thickness dimension measured along said thickness axis, a width dimension measured along said width axis and a length dimension measured along said length axis, wherein said thickness dimension is smaller than either of said width and length dimensions, the improvement comprising:

  • said energy storage capacitor having mutually orthogonal thickness, width and length axes, and having a thickness dimension measured along said thickness axis, a width dimension measured along said width axis and a length dimension measured along said length axis, wherein said thickness dimension of said capacitor is smaller than either of said width and length dimensions of said capacitor, said capacitor further including a first plate layer, a second plate layer, and a dielectric layer separating said first plate layer and said second plate layer, said first plate, second plate and dielectric layers being arranged spirally about an axis parallel to said thickness axis of said capacitor, said thickness axis of said capacitor being substantially parallel to said thickness axis of said housing.

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