Key type diode
Key type in germanium or silicon diode is the single chip welding or silver thread and form. The characteristics of contacts between the diode and the alloy type diode. Compared with contacts type, although key type of the diode’s PN junction electric capacity increases slightly, but positive characteristic especially good. Many used to be switch, is sometimes used in the detection and power rectifier (less than 50 mA). In key type diode, welding gold-rimmed diodes are sometimes called JinJian type, welding silver of the diode is sometimes called silver key type.
Alloy type diode
In N type of germanium or silicon single chip, through the alloy, aluminum and other metal indium method of making PN junction and form. The forward voltage drop small, and is suitable for large current rectifier. Because of its PN junction when large capacity reverse static electricity, so is not suitable for high frequency detection and high frequency rectifier.