What is a PIN Diode?PIN Diode DefinitionA PIN diode is a specific type of diode that features an undoped intrinsic semiconductor layer of silicon or germanium between the heavily doped p-type semiconductor and n-type semiconductor layers. Unlike standard diodes, it includes this additional layer, which poorly conducts electric current but is essential for certain electronic applications. It’s like having a p region, followed by an intrinsic region and then an N region, thus making it a PIN diode