This is a research paper discussing ways to minimize optical cross-talk; some methods used include having a shallow epi wafer and having a smaller opening of the metal shield to ensure all photon fall on the photodiodes.
https://pdfs.semanticscholar.org/0438/6680bce4e30919a9c7d00759f3f6e6c17063.pdf
This is a research paper discussing ways to minimize optical cross-talk; some methods used include having a shallow epi wafer and having a smaller opening of the metal shield to ensure all photon fall on the photodiodes.
https://pdfs.semanticscholar.org/0438/6680bce4e30919a9c7d00759f3f6e6c17063.pdf