ASML CEO Christophe Fouquet says the company's technical knowledge is essential for its work with customers, and he spends time studying the technical details of the company's chip-making machines. Fouquet's next big test is leading a transition from extreme ultraviolet lithography technology to high numerical aperture EUV, which aims to push chip geometries below 2-nm and make chips more capable of running advanced applications in AI and other fields. He speaks with Bloomberg's Tom Mackenzie