Method for producing apertures in a diffuse reflector layer having a metal reflection film

A method for producing apertures in a diffuse reflector layer having a metal reflection film, comprising the steps of:

• forming a diffuse reflector layer on a surface of a glass substrate opposite to a surface of the glass substrate on which aperture-forming lenses are formed;
• forming a positive type photosensitive film on the diffuse reflector layer and then subjecting the photosensitive film to exposure and development via self-alignment using the aperture-forming lenses, leaving a remained photosensitive film;
• forming a metal film on the diffuse reflector layer including on the surface of the remained photosensitive film;
• and
• producing apertures in the metal film by removing the remained photosensitive film, such that a center position of the apertures is coaxial with a center position of the aperture-forming lenses.