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Physical layout and structure of RGBZ pixel cell unit for RGBZ image sensor

  • US 10,128,287 B2
  • Filed: 07/24/2017
  • Issued: 11/13/2018
  • Est. Priority Date: 12/22/2014
  • Status: Active Grant
First Claim
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1. A pixel unit cell comprising:

  • a non-visible light photodiode region and exactly three visible light photodiode regions, wherein the non-visible light photodiode region and the exactly three visible light photodiode regions collectively form a rectangle;

    a non-visible light capacitance region that is (i) associated with the non-visible light photodiode region, (ii) not associated with any other photodiode region, and (iii) formed at a corner of the non-visible light photodiode region that is shared with exactly one of the three visible light photodiode regions;

    a non-visible light transfer gate positioned between the non-visible light photodiode region and the non-visible light capacitance region;

    a single visible light capacitance region associated with the exactly three visible light photodiode regions; and

    for each of the exactly three visible light photodiode regions, a respective visible light transistor gate positioned between the visible light photodiode region and the single visible light capacitive region at a corner of the visible light photodiode region that is shared with all of both other visible light photodiode regions and the non-visible light photodiode region, wherein no electrode is positioned between the non-visible light photodiode region and the single visible light capacitive region.

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