PHASE DETECTION AUTOFOCUS TECHNIQUES

摘要

The present disclosure relates to an image sensor having autofocus function and associated methods. In some embodiments, the integrated circuit has a photodiode array with a plurality of photodiodes disposed within a semiconductor substrate and a composite grid overlying the photodiode array and having a first plurality of openings and a second plurality of openings extending vertically through the composite grid. The integrated circuit further has an image sensing pixel array with a plurality of color filters disposed in the first plurality of openings. The integrated circuit further has a phase detection pixel array having a plurality of phase detection components that are smaller than the plurality of color filters and that have a low refractive index (low-n) material with a refractive index (n) smaller than a refractive index of the plurality of color filters, wherein the phase detection components are disposed in the second plurality of openings.

主权项

1. An integrated circuit, comprising:
a photodiode array comprising a plurality of photodiodes disposed within a semiconductor substrate; a composite grid overlying the photodiode array and having a first plurality of openings and a second plurality of openings extending vertically through the composite grid; an image sensing pixel array comprising a plurality of color filters disposed in the first plurality of openings; and a phase detection pixel array comprising a plurality of phase detection components that are smaller than the plurality of color filters and that have a low refractive index (low-n) material with a refractive index (n) smaller than a refractive index of the plurality of color filters, wherein the phase detection components are disposed in the second plurality of openings, wherein the plurality of phase detection components.