- Comchip Technology Corporation leads in the design and manufacture of SMD discrete semiconductors. With innovative research and patented manufacturing capabilities, Comchip offers bridge rectifiers, fast efficient rectifiers, switching diodes, Zener diodes, Schottky diodes, TVS and ESD surge protectors. We have the right diode for your application. Comchip Technology is the first manufacturer to standardize DFN/flat chip packaging that are RoHS compliant and zero Tin-Whisker potential by using gold termination. DFN packages are available in SOD-323F (1005), SOD-523F (0603), SOD-723F (0503), SOD-923F (0402) and 0201 sizes.