A test microchip for evaluation of hermetic packaging technology for biomedical prosthetic implants

Mohammad Kazemi, Eric Basham, Mohanasankar Sivaprakasam, Guoxing Wang, Damien Rodger, James Weiland, Y. C. Tai, Wentai Liu, Mark Humayun

研究成果: Conference article同行評審

15 引文 斯高帕斯(Scopus)

摘要

The development of a test chip that will be used to evaluate a hermetic and biocompatible package for the driving CMOS circuitry of a retinal prosthesis is described. The package design is estimated to be about 2 × 2 × 0.3 mm 3 and will be formed by conformal layers of parylene and a metal (e.g. titanium) as inner and outer protections, respectively. The test chip has been specifically designed for evaluation of the packaging technology. It consists of many blocks of analog and digital components as well as relative humidity and temperature sensors. The test chip has more probe points than a typical chip, allowing a more thorough evaluation of circuit behavior during the testing. This chip will first be coated in a layer of parylene C and soaked in heated isotonic saline for an extended period of time. Every block in the chip will then be tested for functionality using the surface probe points. The next step is to coat the surface of another test chip with parylene and a metal and repeat these soak tests. The results will then be analyzed and mean time-to-failure for the different samples will then be computed. Using the accelerated testing paradigm, these results will then be extrapolated to mean time-to-failure in the operating intraocular environment. Parylene test structures have already undergone an accelerated lifetime test and results have been analyzed.

原文English
頁(從 - 到)4093-4095
頁數3
期刊Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
26 VI
出版狀態Published - 2004
事件Conference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004 - San Francisco, CA, United States
持續時間: 2004 9月 12004 9月 5

All Science Journal Classification (ASJC) codes

  • 訊號處理
  • 生物醫學工程
  • 電腦視覺和模式識別
  • 健康資訊學

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