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As for the two most commonly used metals for engagement and wedding rings–platinum and gold, most people distinguish them by their different color. While platinum is naturally white, gold is naturally yellow. However, rings made by white gold (composed of gold, alloys, and a rhodium plating) have a similar white color with platinum rings. Since...
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semiconductor-wafer-2019
What are the three generations of Semiconductor Materials? The first generation of semiconductor material The first generation of semiconductor materials mainly refers to silicon (Si) and germanium (Ge) materials. In the 1950s, Ge dominated the semiconductor market and was mainly used in low-voltage, low-frequency, medium-power transistors and photodetectors. However, Ge semiconductor devices were inferior in...
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