Patent ID: 8330171
Filing Date: 2012-12-11
Classification: H01L

Abstract:
1. A photo-detector comprising: a first diode region of first doping type for receiving light; a second diode region of second doping type and of second thickness; an active region for converting the received light to an electronic signal, the active region having a third thickness and configured to reside between the first diode region and the second diode region; a reflector coupled to the second diode region and having a silicon layer with a fourth thickness, the silicon layer residing between silicon oxide layers of fifth thickness, wherein the third thickness of the active region is configured to absorb light of wavelengths of less than 900 nm, and wherein the forth and the fifth thicknesses of the reflector are configured to reflect light of wavelengths from a range of 1260 nm to 1380 nm; a passivation layer of sixth thickness surrounding a portion of the active region and the first diode region; and an interface layer having an anti-reflective-coating (ARC) of first thickness and coupled to the passivation layer, wherein a portion of the passivation layer is of the first doping type and is coupled to the interface layer.