The selective version of this process is used to produce semiconducting thin films.
The selective version of this process is used to produce semiconducting thin films. Anhydrous [aan-HY-drus] zinc chloride can be purified by this process in a stream of hydrogen chloride gas, followed by heating to it 400 degrees Celsius in a stream of dry nitrogen gas. This is used for electronic cooling and heat transfer with naphthalene, with which it can also be used to create a purified form of caffeine collected on a cold surface as it condenses. It is the opposite of deposition, and notably occurs to carbon dioxide in the form of "dry ice". Name this process, the direct transformation of a solid to a gas.
The selective version of this process is used to produce semiconducting thin films.
sublimation [accept word forms]