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An efficient approach to engineering the Al2O3/GaN positive interface fixed charges (Qit+) by post-dielectric annealing in nitrogen is demonstrated. The remarkable reduction of interface fixed charges from 1.44×1013 to 3×1012 cm−2 was observed, which leads to a record high threshold voltage (VTH) of +7.6 V obtained in the Al2O3/GaN MOSFETs. The positive interface charges were proposed originating...
An efficient approach to engineering the AhOß/GaN positive interface fixed charges (Qit+) by post-dielectric annealing in nitrogen is demonstrated. The remarkable reduction of Qit+ from 1.44×1013 to 3×1012 cm−2 was observed, which leads to a record high threshold voltage (Vth) of +7.6 V obtained in the AhOß/GaN MOSFETs. The positive interface charges were proposed originating from the N-vacancy and...
Under an ultralow driven current density about 15 , a blue electroluminescence could be observed from the nanocrystalline n-ZnO/p-GaN heterojunction light-emitting diode. The photoluminescence spectrum showed a dominant sharp near-band-edge emission, and the deep-level emission of the nanocrystalline ZnO films was not observed. Current–voltage characteristics of the heterojunctions...
In order to overcome the drawback of traditional tolerance design only focus on cost of manufacturing, but few consider product Life Cycle Cost, a new tolerance design methodology based on LCC (TD Based On LCC) was created. TD Based On LCC expands tolerance optimization based on the manufacturing cost to the product life cycle cost and The objective is to improve product quality to the six sigma level...
In this paper, a new Design for Six Sigma(DFSS) integrating Artificial Neural Network approach is presented for improving quality and manufacturability simultaneously. Followed the neural network based on optimal DFSS method is employed as a tool in cutting parameters optimization. The results showed the roller burnishing formation can be controlled by adjusted cutting parameters with DFSS. The experiments...
Traditional Quality and Reliability Engineering often are separated, which cause lacks powerful methods and tools on the earlier development stage and takes high cost and long time. This paper proposes a new integrated quality and reliability methodology based on Life Cycle Six Sigma (LCSS) to assure product good quality, high reliability, low LCC, low price and short lead time simultaneously. A set...
Femtosecond two-color pump-probe experiments on intersubband absorption spectra of electrons in a GaN/AlN superlattice show distinct spectral holes unraveling both the homogeneous broadening contribution and the underlying optical phonon progression.
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