Reliability is the probability that an item will perform the required function under stated conditions for a designated period of time. It is the proportion of devices used from time zero that will not have failed by a given time ‘t’.
ESS Technology Inc. strives to achieve the highest quality and reliability performance on all our products through a systematic approach. We emphasize quality and reliability at every phase of the product: from product design/development, fabrication, assembly, testing and out-going quality control.
The bathtub curve is a standard way to picture the types of failures during a device’s life time. There are two basic types of failures, Early Failures and Wear-Out Failures. During the normal operation of the device operation, that is the section between early failures and wear out, the failure rate is normally constant and at an extremely low rate.
Reliability Stress Testing:
Test conditions follow ESS Technology Integrated Circuit Qualification Specifications, applicable JEDEC standards, or AEC Q100. Wherever conflicts arise, JEDEC is followed for commercial product and AEC is followed for automotive products. For Board Level Reliability, IPC-9701 is used as a reference standard.
Devices which undergo the following stress tests are required to pass the same electrical and functional test throughout. Failure analysis is required, and root of causes should be identified, and corrective actions followed as necessary.