Used OAI 804 TSA #9311625 for sale

OAI 804 TSA is a mask aligner that was developed by OAI (Opto-Automated Imaging) for the industrial lithography process. It is a highly precise instrument used in semiconductor manufacturing, which is responsible for accurately placing a pattern of photomasks onto a semiconductor wafer. It is especially useful for transferring patterns of tiny features, such as those needed to produce an integrated circuit, onto the wafer. 804 TSA consists of three parts: the optical system, the microstepper, and the detector. The optical system is responsible for receiving light reflected from the photomask that is used to form the design; it also divides the incident light into two components: linear and angular. The angular component is used to measure the position of the wafer with respect to the photomask. The linear component is responsible for focusing light onto the detector, which is used to measure distances and angles between features on the photomask and those on the wafer. The accuracy of OAI 804 TSA is achieved by using a microstepper to move the wafer into the exact, predetermined position. The microstepper is responsible for controlling the movement of the wafer with a sub-nanometer accuracy. This allows for CAD files to be accurately transferred onto the wafer, which can then be used in the production of semiconductor chips. 804 TSA is equipped with a detector that allows for image alignment during multiple exposures. This detector is used for both static and dynamic alignment. Static alignment uses lasers to quickly align single exposures; while dynamic alignment uses the video imaging system to monitor the mask position in real time and ensure that the multiple exposures are accurately aligned onto the wafer. Overall, OAI 804 TSA is an essential tool for industrial lithography, which is needed to accurately transfer designs onto the semiconductor wafer. Its accurate microstepping and detector allow for highly precise images to be transferred, ensuring the highest levels of manufacturing accuracy.