Patent ID: 6875276

Claim:
An apparatus for fabricating a layered periodic structure from thin uniform alternating layers of a first and a second material on a substrate, comprising: a receiving vessel having a central axis and configured to receive the first and the second materials therein; a substrate mount for retaining the substrate; a holding member, connecting a side of said receiving vessel to a side of said substrate mount, having a longitudinal axis and having a channel along said longitudinal axis configured to enable the first and the second material to flow from said receiving vessel to an upper surface of the substrate; a position adjustment unit connected to said substrate mount and to said holding member, operable to incrementally move said substrate mount along a vertical axis to maintain said upper surface of the substrate aligned with said channel; a driving unit connected to said receiving vessel for rotating said receiving vessel at a predetermined speed about said central axis; and material delivery means for: (a) delivering the first material to said receiving vessel when said driving unit is activated, such that centrifugal force causes the first material to flow from said receiving vessel to said upper surface of the substrate to form a uniform first layer, (b) delivering the second material to said receiving vessel when said driving unit is activated, such that centrifugal force causes the second material to flow from said receiving vessel to said upper surface of the substrate to form a uniform second layer over the first material, and (c) repeating delivery of the first and the second materials until a predetermined number of alternating first and second material layers are formed on said substrate upper surface thus fabricating a layered periodic structure.