Used NIKON P/N 4B991-151AN #148896 for sale

NIKON P/N 4B991-151AN is a wafer stepper designed for precision lithography applications. Its primary components include a highly accurate motion equipment, a motorized wafer stage for wafer alignment, and an optical system for imaging. This wafer stepper is capable of producing extremely small and intricate features with great accuracy. NIKON P/N 4B991-151AN uses an advanced, crystal-clocking technology to achieve the highest precision in the industry. This is crucial for producing images that are crisp and clear. The clock is accurate to ± 0.25 nanoseconds, allowing it to accurately divide the exposure time into extremely small values. The exposure time determines the size of the feature pattern being imaged, so having precise control over exposure time is key to achieving the highest resolution. The wafer stage also plays an important role in image accuracy. It is used to align the wafer to the desired coordinates before exposure. A high-resolution motor is used to quickly and precisely move the wafer to the exact position needed. This ensures that the pattern is accurately aligned and exposed in the correct position. The optical unit is designed to provide the highest possible performance. It utilizes advanced automatic focus control to ensure the best possible focus and correct imaging. Specially designed lenses are used to accommodate different types of exposures, so that the image is accurate regardless of the exposure time. It also features a high numerical aperture for better exposure times and small features. Finally, NIKON P/N 4B991-151AN provides exceptional exposure accuracy and stability. It's equipped with a high-accuracy shutter machine to ensure that the exposure time is precise and consistent. With the many features of this wafer stepper, it is capable of producing extremely small, intricate features with great accuracy. This is why NIKON P/N 4B991-151AN is an excellent choice for precision lithography applications.