Influence of chemical surface treatment on charge storage stability for miniature si3n4 sio2 electret film 化学表面处理对微型化的氮氧化硅驻极体层电荷储存性能的影响
Laser diodes ( contd . ) : in - plane lasers : double heterostructure , quantum well , multi - contact , surface emitting 21雷射二极体(续) ：平面雷射：双异质结构，量子井，多重电极，面发射。
It specilizes in manufacture of carious circyle receiver , electret receiver and accessories of various telecommunication product 专业生产各种动圈受话器、驻极体话筒及多种通信产品配件。
In the past , it was thought that polar bodis are a non - functional , small cell with the chromosome and few cytoplasms 过去一般认为极体是具有染色体、含有少量细胞质、正常情况下不参与胚胎发育而退化无功能的小细胞。
A liquid crystal display structure in which switching transistors or diodes are attached to each pixel to control the on / off voltage 液晶显示幕架构在方面哪个接通晶体管或者二极体附在要控制的每个象素上在上/离电压。
Compare other kinds of diodes , thick film cd4148 is smaller , lighter and thinner . the advantage in thickness is the exclusive characteristic of the product 更小更轻更薄，其中厚度上的优势更是其他封装二极体无法比拟
Furthermore , it was found that we could use the gan / sin double buffer to achieve more reliable nitride - based leds 此外，如果氮化镓/氮化矽双缓冲层合并于磊晶结构中，此氮基础的发光二极体其可靠度被证实可以有实质上的改善。
It also gives a safety design problem analysis using an electret capacitor microphone to pick - up the heart sound signals 该电路涉及到放大、滤波、电平抬升等电路，并给出了安全设计问题，利用驻极体电容传声器来拾取心音信号。
