The long term reliability of a switched-capacitor relative humidity sensor system

Denton, Denice D.; Jaafar, M.A.S.; Ralston, A.R.K.; Ho, Carl Ngai Man; He, Shihai

doi:10.1109/mwscas.1990.140855

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…A case study of a solid state relative humidity (RH) sensor reliability analysis by the University of Wisconsin-Madison is provided to illustrate the model [ 34 ]. The drift of capacitance–RH characteristic is the dominant failure mode for a solid state RH sensor at 85 °C/85% RH.…”

Section: Numerical Examples and Resultsmentioning

confidence: 99%

Reliability Modeling for Humidity Sensors Subject to Multiple Dependent Competing Failure Processes with Self-Recovery

Jia

Zhou

Niu

et al. 2018

Sensors

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Recent developments in humidity sensors have heightened the need for reliability. Seeing as many products such as humidity sensors experience multiple dependent competing failure processes (MDCFPs) with self-recovery, this paper proposes a new general reliability model. Previous research into MDCFPs has primarily focused on the processes of degradation and random shocks, which are appropriate for most products. However, the existing reliability models for MDCFPs cannot fully characterize the failure processes of products such as humidity sensors with significant self-recovery, leading to an underestimation of reliability. In this paper, the effect of self-recovery on degradation was analyzed using a conditional probability. A reliability model for soft failure with self-recovery was obtained. Then, combined with the model of hard failure due to random shocks, a general reliability model with self-recovery was established. Finally, reliability tests of the humidity sensors were presented to verify the proposed reliability model. Reliability modeling for products subject to MDCFPs with considering self-recovery can provide a better understanding of the mechanism of failure and offer an alternative method to predict the reliability of products.

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Section: Numerical Examples and Resultsmentioning

confidence: 99%

Reliability Modeling for Humidity Sensors Subject to Multiple Dependent Competing Failure Processes with Self-Recovery

Jia

Zhou

Niu

et al. 2018

Sensors

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“…Their tests showed that the sensor could remain in good working condition for a prolonged period. Lofgren et al also successfully prepared a PI capacitive humidity sensor in 1988 [Figure 13] [84] . The sensor has a relatively accurate and rapid response and sufficient environmental stability at low relative humidity (below 50%).…”

Section: Humidity Sensormentioning

confidence: 99%

Applications of flexible polyimide: barrier material, sensor material, and functional material

2022

Soft Sci

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Polyimide (PI), as an advanced polymer material, possesses the intrinsic merits of excellent resistance to extreme temperatures, good dielectric properties, flame resistance, strong processibility, biocompatibility, and flexibility. The outstanding performances of flexible PI have led to a wide range of applications in aerospace, medical, intelligent electronic devices, energy storage devices, and more. Notably, due to the swift progress of various flexible and soft devices, flexible PI has become ubiquitous in the form of thin films, fibers, and foam and gradually plays an indispensable role in all sorts of those devices. This review mainly focuses on the current advances in the usage of flexible PI for barrier, sensor, and functional purposes. Firstly, the key features of various methods for synthesizing and processing PI, as well as the relationship with their respective applications, are summarized. Secondly, to give readers a comprehensive view of the various applications of flexible PI materials, the applications are broken down into three categories: flexible barrier applications, flexible sensing applications, and flexible function applications, and the current research of each application is introduced in detail. Finally, a summary of the challenges and possible solutions in some flexible applications is present.

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“…O segundo circuito baseiase na técnica do conversor Analógico Digital de Inclinação Dupla [48], onde são combinados capacitores, resistores, amplificador operacional e chaves. O terceiro baseia-se na técnica de transferência de carga [49], onde são combinados capacitores, amplificador operacional e chaves.…”

Section: -Introduçãounclassified

Sensor de umidade microeletronico baseado em capacitor com dieletrico higroscopico

Zambrozi¹

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Registro um agradecimento especial ao meu orientador Prof. Dr. Fabiano Fruett pela competência, pelo apoio e pela paciência além do que lhe era exigido.Este trabalho não poderia ter terminado sem a ajuda de diversas pessoas e instituições aos quais presto a minha homenagem:Dr. Ioshiaki Dói (FEEC -UNICAMP) e o Prof. Dr. José A. Diniz (FEEC -UNICAMP) pela ajuda prestada; -Ao M. Sc. Ricardo Cotrin pela amizade e proveitosas discussões acerca do trabalho desenvolvido; -A todo o corpo de funcionários do Centro de Componentes Semicondutores, pela estrutura auxiliar, sem o qual este trabalho não seria possível;-Ao CCS -UNICAMP pela cessão da infra-estrutura;

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The long term reliability of a switched-capacitor relative humidity sensor system

Cited by 6 publications

References 2 publications

Reliability Modeling for Humidity Sensors Subject to Multiple Dependent Competing Failure Processes with Self-Recovery

Reliability Modeling for Humidity Sensors Subject to Multiple Dependent Competing Failure Processes with Self-Recovery

Applications of flexible polyimide: barrier material, sensor material, and functional material

Sensor de umidade microeletronico baseado em capacitor com dieletrico higroscopico

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