
The text was written using a focused ion beam (FIB) generator that shot tiny particles called Gallium ions onto a gold surface covering a base layer of silicon. In a process that can be likened to digging a hole in the earth using a water jet, the ion beam etched the surface of the gold layer, making the underlying silicon layer visible. The actual "writing" of the full text took just 90 minutes. The computer program that guided the FIB, however, took more than three months.(from ATS)
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