What Goes on in these laboratories is called deep reactive-ion etching (DRIE). To begin, a clean silicon wafer, reminiscent of Terminator 2’s T-a thousand in liquid type and created from two levels of mono-crystalline silicon having an oxide layer in between, is covered using a photoresist – a light-delicate material https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/