Light sensing element

A light sensing element includes a substrate, a first type well region, a first type heavily doped region and a second type buried layer. The first type heavily doped region is arranged in the first type well region and comprises a plurality of first type sub heavily doped regions. The first type sub heavily doped regions are separated from each other. The second type buried layer is disposed between the substrate and the first type well region. 一种光感测元件，包括基底、第一型井区、第一型重掺杂区以及第二型埋入层。第一型重掺杂区设置在第一型井区内，且包括多个第一型子重掺杂区。第一型子重掺杂区彼此之间互相分离。第二型埋入层设置在基底与第一型井区之间。