https://www.reuters.com/article/us-usa-semiconductors-tools/global-semiconductor-shortage-spurs-run-on-vintage-chipmaking-tools-idUSKBN2AW18P >Minnesota-based Polar Semiconductor makes chips for automakers and is booked beyond capacity. But expanding production lines to help solve a chip shortage that is shutting down car factories around the world is not feasible - in part due to the scarcity of older-style chipmaking machinery.