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Parylene Technology for Advanced Packaging and Protection of Medical Microelectronics
Keywords: Microelectronics, Parylene, Advance Packaging
Medical implants that either sense or facilitate a physiological response incorporate microelectronic components that must be isolated in order to avoid adverse responses from the body. With the widespread use of medical devices and microelectronic implants to enhance human life, the challenges of making these devices safe and effective continue to increase. In addition, focus on miniaturization, flexibility, long-term protection and biocompatibility for both implantable and non-implantable microelectronic devices are forcing device manufactures to utilize innovative materials and technologies to achieve their goals. Among the available materials for medical applications, Parylenes (vapor phase polymers) have played a significant role in the packaging and protection of such devices, increasing safety and enhancing the overall reliability of microelectronics that encounter body tissues and fluids. Parylenes have also been effective on non-implantable medical microelectronics devices, providing protection from adverse environmental effects. Examples of Parylenes in medical electronic devices include retinal implants, implantable cardiac defibrillators, neurostimulator pulse generators, RFID implants, transdermal drug delivery devices, digital dental imaging equipment, hearing aids, ingestible sensors/transmitters and implantable radiation dosimeters. Their suitability and biocompatibility encourage researchers to explore Parylenes’ role further in sensors and active microelectronic devices for medical applications. There have been recent advances in the Parylene technology itself, particularly in regard to newer medical materials and their innovative applications in medical electronics. This paper presents an overview of advanced, biocompatible Parylene technologies and, through some specific examples, how they can fulfill the growing requirements of current and future innovative medical microelectro
Rakesh Kumar,
Specialty Coating Systems, Inc.
Indianapolis, IN

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