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We fabricated Si: SiO2 films and assessed its optical characteristics using photoluminescence spectroscopy. The Si: SiO2 films were deposited by sputtering Si tablets (15 mm square) onto a SiO2 target (108 mm diameter). Using excitation by a He-Cd laser, photoluminescence was emitted from the films. The bluish color emission was seen by the naked eye at room temperature. Photoluminescence spectra,...
As the size of the software for on-vehicle information devices becomes larger, there is an increasing need to fix bugs after their shipment. It is difficult to release software with no bugs. In many cases, software upgrades take place repeatedly; this involves managing a considerable number of versions, which is difficult. In this paper, we propose a new model for software upgrade and a method to...
This paper presents solutions to reduce measurement error and test time in an AC characteristic test of a source-synchronous device. In order to realize such a solution, we developed a multi strobe circuit which detects a phase difference between output clock and output data at a test cycle in real time without strobe scanning. We implemented a digital delay locked loop for precise multi strobe circuit...
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