Gettering Pumps

Gettering Pumps

Carbon Coater, Pulsed Laser deposition, Sputter Coater, Thermal evaporation
There has also been a Gettering mechanism, which has been a pumping method, since vacuum technology came into being. Historically, the first use of this method was in the early stages of making electron tubes. The basis of the Gettering method is the absorption of some gases by some materials which results in their removal from the environment. Getter pumps fall into the general category of Capture pumps, along with cryopumps and sputter-ion pumps. The Gettering process can be divided into physical and chemical categories. Physical Getters are often found in cryostats and Dewars. In these systems, a zeolite material such as a molecular sieve is used to physically absorb and hold water vapor. If, as is often the case, the molecular sieve is placed against a surface at liquid…
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