XENON DIFLUORIDE ( F2Xe )

Xenon difluoride (XeF2), also known as xenon difluoride, is a colorless solid that easily sublimates at room temperature to form transparent crystals. Xenon difluoride decomposes in neutral or alkaline solutions and is relatively stable in acidic solutions. The aqueous solution has a pungent smell. Xenon difluoride vapor is colorless and has an odor . In the electronics industry, XeF2 is often used as an etching gas for silicon. Since the chemical reaction between XeF2 and silicon is a spontaneous reaction, XeF2 has a very high selectivity for the etching process of silicon. During the etching process of silicon by XeF2, the XeF2 gas By freely diffusing to the surface of the silicon substrate and chemically reacting with the outermost silicon atoms to generate gaseous Xe and gaseous SiF4, the corrosion of silicon is achieved.