ASML Holding NV Chief Executive Officer Christophe Fouquet expects pressure will grow from the US to further restrict sales of semiconductor technology to China, the biggest market for the Dutch producer of chipmaking machines.

The CEO of leading computer chip equipment maker ASML said on Tuesday he expects the United States government will continue to push for further restrictions on its exports to China. Christophe Fouquet said he believes that governments in the Netherlands and Europe are starting to question whether restrictions on older tech the company still ships to China are part of security or trade policy,

The Dutch firm has a monopoly on making the lithography machines that help the world’s largest semiconductor foundries produce advanced chips.