Used NIKON NSR S204B #9272079 for sale

NIKON NSR S204B is a wafer stepper designed to enable the production of extremely small and intricate patterns on semiconductor substrates, or "wafers". It is a photolithographic device, meaning that it uses a ray of light to project patterns on the wafer that are recorded by a photoresist, a photosensitive material. The light source is typically a Xenon or Mercury based Lamp, though modern versions may incorporate LEDs. NIKON NSR-S204B is automated in many ways, and is controlled by a series of coaxial motors to ensure accuracy and repeatability. These motors position the wafer and control the alignment of step and scan, as well as the exposure. Zoom, focus, and alignment are also adjustable for the specific needs of each substrate. These precision motors allow NSR S 204 B to create patterns with resolutions of 0.29 µm for mask Aligners and up to 0.35 µm for steppers. The wafers are placed in the exposure chamber which is made from quartz and epoxy reinforced plastic to ensure no contamination is transferred to the wafers. The light is routed through a series of slit-shaped mirrors that project multiple images onto the wafer to accurately focus the light through a zoom lens. Once in place, the wafer is exposed to the light, and the patterns are recorded. Afterward, the wafer can be removed and processed with further development. NIKON NSR-S 204 B is equipped with several advanced features that allow for additional flexibility, including Enhanced Clustering Control which uses two separate images to form a single exposure. It also has Built-in Scanner Calibration with Fixed Mask features, allowing the wafer to be accurately aligned and focused before exposing to the light. The Package Reduction option reduces the exposure time for high-volume production, and a Full Auto Reticle Search feature ensures that patterns are accurately placed. In addition, NSR-S204B is equipped with several safety features. This includes a chamber door that closes automatically when handling is not detected, as well as an emergency stop button and exposure interlock to minimize potential damage from UV light. The device is also fitted with an antivibration system to dampen the vibration during exposure. Overall, NIKON NSR S 204 B is a powerful and efficient wafer stepper that allows for the rapid production of intricate patterns on semiconductor wafers. Its robust and easy to use features, combined with its safety features, make the device a great choice for micro fabricated devices.