Patent attributes
In one embodiment, the invention provides a method for manufacturing an array of interferometric modulators. Each interferometric modulator comprises first and second optical layers which when the interferometric modulator is in an undriven state are spaced by a gap of one size, and when the interferometric modulator is in a driven state are spaced by a gap of another size, the size of the gap determining an optical response of the interferometric modulator. The method comprises fabricating interferometric modulators of a first type characterized by the size of the gap between its first and second optical layers when in the undriven state; fabricating interferometric modulators of a second type characterized by the size of the gap between its first and second optical layers when in the undriven state; and fabricating modulators of a third type characterized by the size of the gap between its first and second optical layers when in the undriven state, wherein fabricating the interferometric modulators of the first, second, and third types comprises using a sequence of deposition and patterning steps of not more than 9 masking steps to deposit and pattern layers of material on a substrate.
