This is what you need to know about Substrate, the secretive American startup that wants to reinvent chipm and bring it back to the US. Substrate says it's built a chipm tool, a lithography machine that can displace ASML's EUV lithography machine. Substrate's tool uses a particle accelerator as its light source.It's designed from the ground up, about a tenth of the size of ASML's EUV machines that can cost hundreds of millions of dollars. And Substrate says it X-ray lithography machine is already printing w ...