31. Reticle burn-in was also addressed.32. The width of the trunk is measured as so many units of the reticle scale. 33. The seeker's design creates a dead-space in the middle of the reticle . 34. The first suggestion for etched glass reticles was made by Philippe de La Hire in 1700. 35. Etched reticles are images of the desired reticle layout that are etched on an optic element. 36. Etched reticles are images of the desired reticle layout that are etched on an optic element. 37. Because of this, some manufacturers can provide client-designed custom reticles on special order. 38. The design used a simple reticle seeker and an active system to control roll during flight. 39. Flashlight beams act as a reticle . 40. Successful scanning requires extremely precise synchronization between the moving reticle and wafer stages during the exposure.
