DEVICE FOR DETECTING TWO DIFFERENT COLORS HAVING IMPROVED OPERATION CONDITIONS

摘要

According to the invention, the substrate (3) sequentially comprises a first semiconductor layer (5) having a first band gap energy, a buffer semiconductor layer (6) a second semiconductor layer (7) having a second band gap energy different from the first band gap energy. Two photo-detectors (1, 2) sensitive to two different colors are respectively formed by means of the first and second semiconductor layers (5, 7). The first semiconductor layer (5) comprises two main opposite surfaces. The first main surface is covered by the second semiconductor layer (7). The second main surface is covered or not by a passivation film (4) having a thickness equal to or lower than 3 μm.