ASML is one of the world’s leading manufacturers of chip-making equipment. Headquartered in Veldhoven, the Netherlands, ASML employs more than 21,000 people.
The YieldStar S-1375F is a stand-alone metrology system that measures in-device overlay and CD for after-etch applications.
By utilizing the YieldStar S-1375F's unique high-NA system, customers can measure device overlay and CD with speed and accuracy. This capability enables hyper dense sampling and faster feedback of after-etch data to the TWINSCAN and etchers.
Building on the proven YieldStar S-375F platform, the YieldStar S-1375F implements specific innovations to improve in-device overlay and CD measurements. The YieldStar S-1375F enables the following applications:
On-product After-Etch Overlay and CD measurements for memory devices, using the actual device pattern
On-product After-Etch Overlay and CD measurements for logic devices, enabled by the use of small 5x5 μm targets
The YieldStar S-1375F provides much denser sampling compared to current metrology tools, based on electron beam metrology, improving move-acquire-measure (MAM) time by more than 25x. This innovation feeds advanced overlay control loops, in conjunction with ASML's Overlay Optimizer 3 and Pattern Fidelity Control enhancements.
Accuracy and Process Robustness
The YieldStar S-1375F re-uses the continuous wavelength concept from the YieldStar S-375F platform, enabling faster switching time, improving multi-wavelength acquisition move-acquire-measure time. Further improvements in the detection optics improve signal-to-noise of the measurement signal, increasing the accuracy and robustness of the YieldStar S-1375F measurement recipes.