Retardation films or plates have various applications such as polarization manipulation and phase compensation. Half-wave plate (HWP) and quarter-wave plate (QWP) are the most commonly used retardation films. In all applications, the HWP and QWP should work well in the whole visible spectrum (400~70.....
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A novel zone melting method to purify industrial phosphorus is introduced. Since there is no chemical solvent for phosphorus, chemical extraction purification does not work for arsenic purification. Zone melting is a method for removing impurities from solid materials. This method with a special set.....
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III-nitride compound semiconductors have the merits of wide band gap, high breakdown field, and large thermal conductivity, which results in well designed AlGaN/GaN heterojunction field-effect transistors. This transistor is capable of high temperature operation, suitable for high temperature integr.....
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