Accelerated life-test methods and results for implantable electronic devices with adhesive encapsulation

Huang, Xuechen; Denprasert, Petcharat May; Zhou, Li; Vest, Adriana Nicholson; Kohan, Sam; Loeb, Gerald E.

doi:10.1007/s10544-017-0189-9

Cited by 18 publications

(13 citation statements)

References 23 publications

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“…There are many factors which causes failure of an electronic device such as thermal effect, environmental effect, mechanical or electrical overloading etc. The failure can be done at packing level due to solder joints [5]. The electronic components have a vital role in army related vehicles.…”

Section: Reliability and Failure Predictionmentioning

confidence: 99%

Estimation of Residual Lifetime of Electrolytic Capacitor using Analytical Techniques

Bhargava¹,

Gulati²,

Sharma³

2019

IJRTE

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In the fast-evolving era of digital electronics, reliability has become a critical issue. Due to failure and faults, the component manufacturers face market reputation degradation as well as financial set back. The condition monitoring for power electronics are based on basic principles; however, by analyzing failure modes of semiconductor devices and exploring appropriate techniques, situation has been improved a lot. From toy to satellite, an electrolytic capacitor is mostly used as an important component. This paper enlightens the estimation of residual lifetime of electrolytic capacitor using analytical techniques, so that these components can be reused and problem of WEEE (Waste of Electrical and Electronic Equipment) can be reduced to a large extent. The residual life of electrolytic capacitor is calculated using various analytical and mathematical technique. Accuracy of empirical standard prediction methods such as military handbook MILHDBK and RIAC217 is compared for the residual life prediction of electrolytic capacitor. RIAC217 plus technique proves to be more accurate than MILHDBK or other standard techniques. By predicting the residual life, the capability of re-use the component increases and problem of e-waste is decreased to a great extent. Thus, the residual lifetime prediction is a critical parameter for successful operation of device as well as safe healthy environment

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Section: Reliability and Failure Predictionmentioning

confidence: 99%

Estimation of Residual Lifetime of Electrolytic Capacitor using Analytical Techniques

Bhargava¹,

Gulati²,

Sharma³

2019

IJRTE

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“…Huang et al [19] tested IDCs connected to an ingenious inductively-coupled circuit. These dummy implants used ceramic substrates and gold tracks; these were cleaned in various ways and encapsulated in epoxy.…”

Section: Using the Apparatus In Implant Life-testing Researchmentioning

confidence: 99%

Apparatus to investigate the insulation impedance and accelerated life-testing of neural interfaces

et al. 2018

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Objective. Neural interfaces and other implantable micro-devices that use polymerencapsulated integrated circuits will only be allowed in medical devices when their lifetimes can be estimated from experimental data. An apparatus has been developed and tested that allows hundreds of insulated samples (interdigitated combs) to be aged under accelerated conditions of high temperature and voltage stress. Occasionally, aging is paused while the sample's impedance is measured; the impedance spectrogram may show degradation as it progresses before failure. Approach. The design was based on practical considerations which are reviewed. A Solartron Modulab provides the frequency response analyser and the femtoammeter. The apparatus can accommodate batches of samples at several temperatures and with different aging voltage waveforms. It is important to understand features of the spectra that are not due to comb-comb leakage, but come from other places (for example substrate-solution leakage); some have been observed and investigated using SPICE. Main results. The design is described in detail and test results show that it is capable of making measurements over long periods, at least up to 67 °C. Despite the size of the apparatus, background capacitance is about 1 pF and comb-comb capacitances of about 30 pF can be measured down to 10 mHz, an impedance of about 100 GΩ. An important discovery was the advantage of grounding the bathing solution, primarily in that it raises the measurement ceiling. Observation and SPICE simulation shows that leakage from the substrate to the bathing solution can give phase lags >90°, in contrast to comb-comb leakage which reduces phase lag to <90°. Significance. The value of this paper is that it will facilitate research into the endurance of small implanted devices because, given a description of a proven apparatus, researchers can start building their own apparatus relatively quickly and with confidence.

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“…For all these scenarios, the presence of liquid water is necessary. Yet, for the latter case, the presence of an electric field between the metals is the main driving force [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Effect of Signals on the Encapsulation Performance of Parylene Coated Platinum Tracks for Active Medical Implants

Nanbakhsh

Kluba

Pahl

et al. 2019

2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

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Platinum is widely used as the electrode material for implantable devices. Owing to its high biostability and corrosion resistivity, platinum could also be used as the main metallization for tracks in active implants. Towards this goal, in this work we investigate the stability of parylene-coated Pt tracks using passive and active tests. The test samples in this study are Pt-on-SiO2 interdigitated comb structures. During testing all samples were immersed in saline for 150 days; for passive testing, the samples were left unbiased, whilst for active testing, samples were exposed to two different stress signals: a 5 V DC and a 5 Vp 500 pulses per second biphasic signal. All samples were monitored over time using impedance spectroscopy combined with optical inspection. After the first two weeks of immersion, delamination spots were observed on the Pt tracks for both passive and actively tested samples. Despite the delamination spots, the unbiased samples maintained high impedances until the end of the study. For the actively stressed samples, two different failure mechanisms were observed which were signal related. DC stressed samples showed severe parylene cracking mainly due to the electrolysis of the condensed water. Biphasically stressed samples showed gradual Pt dissolution and migration. These results contribute to a better understanding of the failure mechanisms of Pt tracks in active implants and suggest that new testing paradigms may be necessary to fully assess the long-term reliability of these devices.

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Accelerated life-test methods and results for implantable electronic devices with adhesive encapsulation

Cited by 18 publications

References 23 publications

Estimation of Residual Lifetime of Electrolytic Capacitor using Analytical Techniques

Estimation of Residual Lifetime of Electrolytic Capacitor using Analytical Techniques

Apparatus to investigate the insulation impedance and accelerated life-testing of neural interfaces

Effect of Signals on the Encapsulation Performance of Parylene Coated Platinum Tracks for Active Medical Implants

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