Fabrication of Three—Dimensional Objects Using Laser Lithography

Abstract There is no established technique for the 3‐dimensional (3‐D) pattern formation, and many structures cannot be formed using the conventional CAD/CAM technology. We have constructed a simpler economical system for the 3‐D pattern formation by using an ultraviolet laser and light‐sensitive resins. In this technique, the CAD data designed by a computer are sliced horizontally. Using the sliced data, the laser is moved in a 2‐D direction and the light‐sensitive resin is irradiated. Then solidified thin plates are stacked to form a pattern. Using this technique, such complicated patterns as holes, screws and hollow objects, can be formed by one process. Since it is not necessary to maintain the cutting tools and the cutting scraps, a completely automated process can be achieved.