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Diode type
Feb 01, 2018

Diode types are many, according to the semiconductor materials used, can be divided into germanium diodes (Ge tube) and silicon diodes (Si tube). According to their different uses, can be divided into the detector diode, rectifier diodes, Zener diodes, switching diodes, isolation diodes, Schottky diodes, light-emitting diodes, silicon power switching diodes, rotating diodes. According to the die structure, but also can be divided into point contact type diode, surface contact type diode and planar type diode. The point-contact diode is pressed against the surface of a clean semiconductor wafer with a thin metal wire, which is pulsed with current so that one end of the contact wire is firmly sintered with the wafer to form a "PN junction". Because it is a point of contact, allowing only a small current (not more than tens of milliamps), suitable for high frequency and low current circuits, such as the detection of the radio. Surface contact diode "PN junction" larger, allowing a larger current (a few to tens of security), mainly for the exchange of DC into a "rectifier" circuit. Planar diode is a special silicon diode, it can not only through a larger current, and stable and reliable performance, used in switching, pulse and high-frequency circuits.