An electrostatically deflectable beam spatial light modulator with the beam composed of two layers of aluminum alloy and the hinge connecting the beam to the remainder of the alloy formed in only one of the two layers; this provides a thick stiff beam and a thin compliant hinge. The alloy is on a spacer...http://www.google.com/patents/US5172262?utm_source=gb-gplus-sharePatent US5172262 - Spatial light modulator and method
