本揭露系关于具有自动对焦功能之一影像传感器及相关联方法。在某些实施例中，集成电路具有：一光电二极管数组，其具有放置于一半导体基板内之复数个光电二极管；及一复合栅格，其上覆于该光电二极管数组且具有垂直延伸穿过该复合栅格之第一复数个开口及第二复数个开口。该集成电路进一步具有：一影像传感像素数组，其具有放置于该第一复数个开口中之复数个彩色滤光器。该集成电路进一步具有：一相位侦测像素数组，其具有复数个相位侦测组件，该复数个相位侦测组件小于该复数个彩色滤光器且具有带有小于该复数个彩色滤光器之一折射率(n)之一折射率之一低折射率(低n)材料，其中该等相位侦测组件放置于该第二复数个开口中。

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.