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Reliability estimation for ultrasonic transducer by voltage accelerated life test
Chulhee Kim,Bochul Kang,Byeongsuk Song 대한전자공학회 2008 ICEIC:International Conference on Electronics, Inf Vol.1 No.1
As the income level was improved, the demand of humidifiers is increased. So the reliability of ultrasonic transducer which is the main part of humidifiers is very important too. To verify the reliability of ultrasonic transducers which were made of two kinds of material (TiN anodizing and Cr plating), voltage accelerated life test was performed . According to the data of failure time, PDF(Probability Density Function) and B10 life time were derived. As a result, TiN Anodizing material has better reliability than Cr plating material. Also failure analysis was performed using optical microscope and SEM. By the proper implementation, it is assumed that the same failure in field will be not occurred