Process for making a mold for the manufacture of microlenses

摘要

Preferential etching techniques are used to form a mold which can then be used to mold a microlens array. A mask (4i) made of a material which is resistant to a chemical composition for etching the plate is formed on a substrate, so that the mask is in the form of a grid with generally polygonal meshes each centered over one of the desired cells. The sides of each cell of the mask has outgrowths (5j) extending towards the center of desired cells. The substrate is subjected to the etching composition.