Switchable light modulator device comprising a polymer wall structure having a plurality of cavities disposed between first and second substrates and method of making the same

Abstract

A switchable light modulator device () comprises a first substrate () and a second substrate () with opposite major surfaces spaced apart by one or more polymer structures that each comprise two or more parts and define wall features () for a plurality of cavities (), the cavities sealing a fluid () or gel in discrete volumes. Each of the one or more polymer structures comprises a mould part () bonded to the first substrate and defining a recess (), and a cast part () filling the recess and bonded to the second substrate and a surface of the recess, the cast part being defined by the surface of the recess and the second substrate replicating the surfaces of both.