REDUCED VOLUME CAPACITOR FOR IN VIVO DEFIBRILLATOR

超过三分之一的体内心脏除颤器体积是 分配给电容器的容量约为20 cm3。本征电介质 在集成电路技术中表现出来的特性意味着 这一体积可以减少到1立方米以下。斯皮尔公司 建议使用金属有机化学气相沉积(MOCVD)来形成 电容器结构中的薄膜铁电陶瓷，其至少 比目前商业上可用的能量密度高100倍。 基于铁电化合物的薄膜介电材料具有极大的 高介电常数(超过1,000)和高电击穿 无空隙或其他磁场沉积时的强度(100 V/微米)- 增强缺陷。 在第一阶段，斯派尔展示了一种高能单层电容器 密度和均匀沉积介质的能力 足够的面积作为全尺寸原型的原则证明 电容器可以在第二阶段建造。在第二阶段研究中，斯皮尔建议 为了在温度范围内优化介电成分， 体腔内装有除颤器，以优化电容器 设计以适应现有的电子产品，并生产足够的 除颤器制造商可以测试的样机数量 符合法规的高级组件。成功 拟议方案的完成将导致立即推出 更小的心脏除颤器设备，改善了患者舒适度 较小的除颤器会立即影响患者的舒适度 因为电容器的成本很小，所以商业市场是有保证的 心脏除颤器系统总价值的分数。

Over one-third of the volume of in-the-body heart defibrillators is allocated to the capacitor, approximately 20 cm3. Intrinsic dielectric properties, demonstrated in integrated circuit technology, imply that this volume could be reduced to less than 1 cm3. Spire Corporation proposes to use metalorganic chemical vapor deposition (MOCVD) to form thin film ferroelectric ceramic in a capacitor structure with at least 100 times greater energy density than presently available commercially. Thin film dielectrics based on ferroelectric compounds have extremely high dielectric constant (over 1,000) and high electrical breakdown strength (100 V/microm) when deposited without voids or other field- enhancing defects. In Phase I, Spire demonstrated a single-layer capacitor with high energy density and the capability to uniformly deposit a dielectric with sufficient area as proof-of-principle that full-sized prototype capacitors can be built in Phase II. In Phase II research Spire proposes to optimize the dielectric composition for the temperature range In the body cavity containing the defibrillator, to optimize the capacitor design to fit into existing electronics, and to produce a sufficient number of prototypes that the defibrillator manufacturer can test this advanced component for compliance with regulations. Successful completion of the proposed program will lead to immediate introduction of smaller cardiac defibrillator devices with improved patient comfort A smaller defibrillator would have immediate impact on patient comfort The commercial market is assured because the capacitor's cost is a small fraction of the total value of a cardiac defibrillator system.