Image projection device and method
1994
PURPOSE: To provide an image projection system for all surfaces of a three- dimensional object such as a polyhedron. CONSTITUTION: An image pattern is projected from mask patterns 5 and 8 provided at different levels 3 and 4 directly or through reflection. The mask patterns are doubled but do not overlap each other, and the above levels are separated by a distance H being related to the size of an object. A conductor due to photolithography can be printed simultaneously on the upper surface and all side surfaces of a three-dimensional stack of an integrated circuit chip by the device and process.
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