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在电子管收音机中,常使用电子管“电眼”作调谐指示器。但由于它们体积大,工作电压高,显然不适用于晶体管化设备上。为此利用碳化硅半导体p-n结的正向注入发光研制了一种低电压、小体积的可变面积电发光源,以便为我国日益发展的电讯,电声设备提供一种直观的调谐指示器。器件制作工艺与碳化硅电发光二极管基本相同,这是一种三端器件,芯片长6mm,宽1mm,厚约0.2mm的碳化硅发光系,P型衬底烧结于管座上,n区两端制作欧姆结,n区发光面积约5×1lmm2,To-5封装,带显示窗。
In the tube radio, often use the tube “eye” as a tuning indicator. However, due to their large size and high operating voltage, they obviously do not apply to transistor devices. For this reason, a low voltage and small volume variable area electroluminescent source was developed by using the forward injection luminescence of silicon carbide semiconductor p-n junction to provide an intuitive tuning indicator for the growing telecommunications and electroacoustic devices in our country. The fabrication process of the device is basically the same as the silicon carbide electroluminescent diode, which is a three-terminal device with a silicon carbide luminosity of 6mm, a width of 1mm and a thickness of 0.2mm. The P-type substrate is sintered on the stem, The end of making ohmic junction, n area luminous area of about 5 × 1lmm2, To-5 package with display window.