Patent ID: 8748926

Claim:
A chip package, comprising: a substrate having a first surface and a second surface; a device region formed in the substrate or disposed on the substrate; a dielectric layer disposed on the first surface of the substrate; at least one conducting pad disposed in the dielectric layer and electrically connected to the device region; a planar layer disposed on the dielectric layer, wherein a vertical distance between an upper surface of the planar layer and an upper surface of the conducting pad is larger than about 2 μm; a transparent substrate disposed on the first surface of the substrate; a first spacer layer disposed between the transparent substrate and the planar layer; and a second spacer layer disposed between the transparent substrate and the substrate and extending into an opening of the dielectric layer to contact with the conducting pad, wherein there is substantially no gap between the second spacer layer and the conducting pad, wherein the second spacer layer comprises a main portion and an extending portion, and wherein the extending portion directly contacts with the first spacer layer.