Patent ID: 8053855

Claim:
A CMOS image sensor comprising: a substrate on which a light sensor and device isolating insulation films are formed, in which the top of the substrate is coated with a plurality of metal layers and oxide films; a reflective layer which is formed between the metal layers and encloses part of the oxide films; a color filter by a predetermined thickness, formed in an interior area enclosed by the reflective layer; a protrusion extending from the reflective layer towards a center of an opening on a top surface of the color filter to cover a portion of the top surface of the color filter so that the opening exposing a predetermined area of the top surface of the color filter is formed and light reflected from the light sensor is reflected back to the light sensor by the protrusion; a flat layer formed on the top of the protrusion and the oxide films; and a micro-lens formed on the top of the flat layer, wherein a location and a width of the opening are previously set according to a location of the light sensor, and wherein the micro-lens is set to fix a virtual focus of the micro-lens on the top surface of or filter.