Patent ID: 7187482

Claim:
A method of making a dynamic micro-structured reflector comprising the steps of: depositing a first conducting layer on a substrate having a generally planar major surface and a plurality of cavities on the planar major surface, each cavity having at least a first and second sidewalls set at an angle offset from the planar major surface, patterning the first conducting layer to form a lower electrode on each first sidewall and adjacent portion of the major planar surface; depositing a first dielectric layer on the lower electrode and the substrate; depositing and patterning a sacrificial layer on the first sidewall first dielectric layer; depositing a second dielectric layer on the sacrificial layer and first dielectric layer; depositing a second conducting layer on the second dielectric layer; patterning the second conducting layer to form an upper electrode over each lower electrode; depositing a third dielectric layer on the upper electrode and the second dielectric layer; depositing a reflecting layer on the first and second sidewall third dielectric layer; forming a hole through the second and third dielectric layers to expose a portion of the sacrificial layer; and removing the sacrificial layer to form a dynamic optical face being deflectable between a first position and a second position and a portion of the dynamic optical face being spaced away from the first dielectric layer a first distance in the second position; wherein, the dynamic optical face in the first position redirects more light back to a light source than the dynamic optical face in the second position.