Classification of Crystal Diodes 4

7. Alloy diffusion diode is a type of alloy type. Alloy materials are easily diffused materials. By cleverly doping difficult to produce materials with impurities, they can diffuse together with the alloy to obtain the appropriate concentration distribution of impurities in the formed PN junction. This method is suitable for manufacturing high-sensitivity varactor diodes.

8. Epitaxial diodes are diodes formed by manufacturing PN junctions through the process of extending the epitaxial surface length. Manufacturing requires extremely advanced technology. Due to the ability to freely control the distribution of impurities at different concentrations, it is suitable for manufacturing high-sensitivity varactor diodes.

9. The basic principle of Schottky diode is to block reverse voltage by using the formed Schottky barrier at the contact surface between metal (such as lead) and semiconductor (N-type silicon wafer). The rectification principles of Schottky and PN junctions have fundamental differences. Its voltage resistance is only about 40V. Its strengths are: very fast switching speed and particularly short reverse recovery time trr. Therefore, it is possible to produce switch diodes and low-voltage high current rectifier diodes.