Patent ID: 6656664
Filing Date: 2003-12-02
Classification: H01L

Abstract:
A method of forming a minute focusing lens, the method of forming a minute focusing lens being adapted to form a minute focusing lens with respect to over a photoactive area of an image sensor such as a CCD or CMOS, comprising:coating a resist film on a flattening layer formed over the photoactive area of the image sensor; exposing the resist film to light via a photo-mask, and developing the resist film; and patterning the resist film into a lens configuration, wherein the photo-mask is a light transmission type having no light-shading layer and the photo-mask has provided thereon a light transmission portion comprising a light refraction material, having on its surface portion a stairs portion, the stairs portion having the phase of a transmission light at its respective position controlled relative to a prescribed width so that a desired light intensity distribution may be obtained at the surface of the light-exposed portion.