High-Density Hermetic Packaging for Next-Generation Neural Prostheses

描述(由申请人提供)： 项目概述/摘要本方案的目的是开发新一代微型可植入微刺激器，适用于患者眼内的慢性植入，以治疗视网膜退行性疾病。在这项研究中，我们将使用涂有无机材料的聚酰亚胺电极阵列结构来提供持久的种植体-组织界面。还将开发假体的定制包装和组装方法。根据这项提议，要完成的任务包括在聚酰亚胺中微制造多层电极阵列结构，以与我们的微型神经刺激器设计相匹配。我们还将评估这些结构的生物兼容性和生物稳定性，这将在CIVR上通过体外浸泡测试实验和带有主动和被动设备的尤卡坦微型猪动物模型的存活手术来部分完成。我们将与我们的供应商一起制造新一代高密度陶瓷馈通器，并将其整合到最先进的200通道密封钛封装中，用于我们的视网膜微刺激器，这将导致临床相关的视觉假体。拟议的努力与退伍军人管理局正在进行的患者护理任务之间的关系是，这些改进有望通过比以前更具体、更有针对性的神经刺激打开新的康复可能性-特别是在恢复失明患者的真正有用的视力方面，但也在其他医学领域，如脑深部刺激或脊髓刺激。总而言之，我们希望我们服务的盲人群体最终将受益于我们创造复杂、高度生物稳定的视网膜神经刺激器的能力所带来的视力改善；此外，未来所有类型的无线植入式假体的通道容量和有效性有望得到改善。

DESCRIPTION (provided by applicant): Project Summary/Abstract The aim of this proposal is to develop a new generation of miniaturized implantable micro-stimulators suitable for chronic implantation in a patient's eye to treat degenerative diseases of the retina. In this study, we will use polyimide electrode array structures coated with inorganic materials to provide a long-lasting implant-tissue interface. Custom packaging and assembly methods for the prostheses will also be developed. The tasks to be accomplished under this proposal include the microfabrication of multi-layered electrode array structures in polyimide for mating with our micro-neurostimulator designs. We will also evaluate the biocompatibility and biostability of these structures, which will be done in part at the CIVR through both in vitro soak-testing experiments and through survival surgeries in Yucatan mini- pig animal models with active and passive devices. Together with our vendors, we will fabricate new generations of high-density ceramic feedthroughs and incorporate these into state-of-the- art 200-channel hermetic titanium packages for our retinal microstimulators that will lead to clinically relevant visual prosthetics. The relationship between the proposed effort and the ongoing patient care mission of the VA is that these improvements are expected to open up new rehabilitative possibilities through more specific, targeted neural stimulation than has previously been possible- especially for the restoration of truly useful vision to blind patients, but also in other areas of medicine such as deep brain or spinal cord stimulation. In sum, it is our hope that the blind population we serve will ultimately benefit from the improved visual acuity that will arise from our ability to create complex, highly biostable retinal neurostimulators; additionally, the channel capacity and efficacy of future wireless implantable prostheses of all types is expected to be improved.