Patent Number: 
Section: claims

1. A dynamic pattern generator for controllably reflecting charged particles, the apparatus comprising:a controllable light emitter array configured to emit a pattern of light;an optical lens configured to demagnify the pattern of light; andan array of light-sensitive devices configured to receive the demagnified pattern of light and to produce a corresponding pattern of surface voltages. 2. The dynamic pattern generator of claim 1, wherein the charged particles comprise electrons. 3. The dynamic pattern generator of claim 1, further comprising an electronic driver circuit coupled to the light emitter array for controllably driving the light emitter array. 4. The dynamic pattern generator of claim 3, further comprising a flip-chip bond between the light emitter array and the electronic driver circuit. 5. The dynamic pattern generator of claim 1, wherein the light emitter array comprises an array of resonant-cavity light emitting diodes (RCLEDs). 6. The dynamic pattern generator of claim 5, wherein the array of RCLEDs comprises an array of RCLED mesas configured on a thin substrate. 7. The dynamic pattern generator of claim 6, further comprising solder bumps electrically connecting the RCLED mesas with contact pads of a driver array circuit. 8. The dynamic pattern generator of claim 1, wherein the light emitter array comprises an array of vertical light emitting diodes. 9. The dynamic pattern generator of claim 1, wherein the light emitter array comprises an array of vertical-cavity surface emitting lasers. 10. The dynamic pattern generator of claim 1, wherein the lens demagnifies the pattern of light by twenty times or more. 11. The dynamic pattern generator of claim 1, wherein the array of light-sensitive devices comprise a photodiode array. 12. The dynamic pattern generator of claim 1, wherein the array of light-sensitive devices comprises pixels of 0.5 micron by 0.5 micron size or smaller. 13. The dynamic pattern generator of claim 1, wherein the reflected charged particles are demagnified and projected onto a substrate for maskless lithography. 14. A method of controllably reflecting charged particles, the method comprising:controllably emitting a pattern of light from a light emitter array;demagnifying the pattern of light using a lens;receiving the demagnified pattern of light by an array of light-sensitive devices; andproducing a corresponding pattern of surface voltages for reflecting the charged particles. 15. The method of claim 14, wherein the charged particles comprise electrons. 16. The method of claim 15, wherein the reflected electrons are demagnified and projected onto a substrate for maskless lithography. 17. The method of claim 14, wherein the pattern of light is demagnified by at least twenty times. 18. The method of claim 14, wherein the array of light-sensitive devices comprises pixels of 0.5 micron by 0.5 micron size or smaller. 19. An apparatus for controllably reflecting electrons, the apparatus comprising:means for controllably emitting a pattern of light from a light emitter array;means for demagnifying the pattern of light using a lens;means for receiving the demagnified pattern of light by an array of light-sensitive devices; andmeans for producing a corresponding pattern of surface voltages for reflecting the electrons. 20. The apparatus of claim 19, wherein the reflected electrons are demagnified and projected onto a substrate for maskless electron beam lithography.