Semiconductor device structure and manufacturing process thereof

A semiconductor device structure for sensing an incident light includes a substrate, a passivation layer and a wiring structure. The substrate has a device embedded therein. The passivation layer is disposed on the substrate, where the passivation layer has a first side and a second side opposite to the first side, the first side of the passivation layer includes microstructures disposed on the substrate, and the second side of the passivation layer is a continuous flat plane, wherein each of the microstructures has a cross-section in a shape of a triangle, trapezoid or arc. The wiring structure is disposed on the substrate, where the writing structure includes at least one contact and metal interconnection patterns respectively formed in different dielectric layers, and the at least one contact and the metal interconnection patterns are electrically connected, where the substrate is located between the passivation layer and the wiring structure.