PIN diode
a diode with a wide, undoped intrinsic semiconductor region between a p-type semiconductor and an n-type semiconductor region
en-GB/ˈpɪn ˈdaɪəʊd/
en-US/ˈpɪn ˈdaɪoʊd/
a diode with a wide, undoped intrinsic semiconductor region between a p-type semiconductor and an n-type semiconductor region