Patent Number: 
Section: claims

1. A lithographic apparatus, comprising:a radiation source including a plurality of selectively addressable pn-junction elements, the radiation source generating patterned radiation through selective addressing of the plurality of selectively addressable pn-junction elements; anda projection system that projects the patterned radiation generated by the radiation source onto a target portion of a substrate. 2. The lithographic apparatus of claim 1, wherein each of the pn-junction elements is doped with impurities to increase emission of radiation at a desired frequency. 3. The lithographic apparatus of claim 1, wherein each of the pn-junction elements is covered by a layer of transparent oxide. 4. The lithographic apparatus of claim 1, further comprising:a voltage source that provides a potential difference of at least about 4V to reverse bias selectively addressed ones of the pn-junction elements. 5. The lithographic apparatus of claim 1, further comprising:a voltage source that provides a potential difference of about 5V to reverse bias selectively addresses ones of the pn-junction elements. 6. The lithographic apparatus of claim 1, further comprising:a filter that selects a desired range of wavelengths from the radiation emitted by selectively addresses ones of the pn-junction elements. 7. A lithographic method used to manufacture a device, comprising:selectively addressing an array of pn-junction elements to form a patterned beam of radiation; andprojecting the patterned beam of radiation onto a target portion of a substrate. 8. The method of claim 7, further comprising:doping the pn-junction elements with impurities to increase emission of radiation at a desired frequency. 9. The method of claim 7, further comprising:covering the pn-junction elements with layer of transparent oxide. 10. The method of claim 7, further comprising:providing a potential difference of at least about 4V to reverse bias the selectively addresses ones of the pn-junction elements. 11. The method of claim 7, further comprising:providing a potential difference of about 5V to reverse bias the selectively addresses ones of the pn-junction elements. 12. The method of claim 7, further comprising:filtering a desired range of wavelengths from the radiation emitted by the selectively addressed pn-junction elements.