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the increasing demand for light emitting diodes (LEDs) has been driven by a number of application categories. The construction of LEDs is somewhat similar to microelectronics, but there are functional requirements, materials, and interfaces in LEDs that make their failure modes and mechanisms unique. In this paper, the main failure modes and mechanisms of LED device and its driving module are investigated...
Light emitting diode (LED) lighting is the most promising energy saving solution for future lighting application. For some LED applications, such as the building or bridge lighting application, the corresponding LED lighting system will be expected to be functional as long as the objects stand. Therefore it is necessary to obtain the degradation regularity of LED lighting systems and predict when...
From the 1980s, the flip-chip technology has been successfully used for hybridization of Infrared Focal Plane Array (IRFPA), which leads to a high degree of homogeneity of the indium bumps and therefore very high interconnection efficiency. However, the severe application environment and the large array size bring great challenge to the interconnect reliability. Interconnect failure such as cracking...
Great progress in photoelectric detector technology has been achieved during the passed decade. InGaAs photoelectric detectors operate at room temperature with high quantum efficiency for wavelengths up to 1.7microns and are useful for short wavelength IR (SWIR) applications. With the widespread use of photoelectric detectors in different aspects, the study of laser-induced effects such as disturbance...
The integrated micro metal Dewar is an essential assembly in the infrared detector, and it is required more than ten years vacuum lifetime during application. In this paper, the critical effect factors and failure mechanisms on the vacuum lifetime were analyzed. Four groups of high temperature accelerated life test were introduced, according to the vacuum degradation mechanism, the end-of-life of...
Prognostics and health management (PHM) can provide early warning of failures, reduce unscheduled maintenance events, extend time interval of maintenance cycle, and reduce the life cycle cost of LED lighting systems. In this paper, LED lamp (composed of a fixed number of LED strings and a driving system) is regarded as LED lighting system. This paper introduces different PHM approaches, including...
The Integrated Detector Dewar Cryocooler Assembly (IDDCA) is a critical component for advanced infrared systems, and especially in infrared (IR) applications, a high reliability for the IDDCA is required increasingly. In this paper, we systematically analyze the failure modes of IDDCA, such as interconnect failure, diodes degradation, vacuum failure, spring fracture, leakage of working medium, mechanical...
The trend of most electronic products is toward higher operating frequencies. Recently the microwave modules have been used worldwide step by step in high frequency application. In this paper, the reliability of bonding between substrate and metal cavity of microwave module is studied. Two different kinds of bonding methods are introduced, which are bonding with adhesive or with solder paste respectively...
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