Getter Technology

Lamedica G, Balucani M, Ferrari A, Bondarenko V, Yakovtseva V, Dolgyi L (2002) Gettering technology based on porous silicon. Solid State Phenom 82-84 405 10 Lei Z, Kang Y, Hu M, Qiu Y, Cen H (2004) Origin mechanism of residual stresses in porous silicon film. Proc SPIE 5641 116-123... 

The largest use for barium is as a getter to remove the last traces of gases from vacuum and television picture tubes. It is ideal for this use because of its combination of high chemical reactivity and low vapor pressure (28—32). In some cases it is used as powder obtained by vaporization ia an electric arc (33). It can also be used as an aluminum ahoy (see Vacuum technology). 

Vacuum Tubes. In the manufacture of vacuum tubes for use in polarized ion sources, vaporized cesium is used as a getter for residual gaseous impurities in the tube and as a coating to reduce the work function of the tungsten filaments or cathodes of the tube. The cesium vapor is generated by firing, at about 850°C within the sealed and evacuated tube, a cesium chromate pellet and zirconium (12) (see Vacuum technology). 

Vacuum technology acceptance specifications for getter-ion pumps 8/85... 

Use of silicone gel particle getters for microcircuit packaging. In Proc. ISHM 1985. Application Note 0503, Pike Technologies, www.piketech.com. 

This chapter will focus on the open cell PU foams, even though many general aspects and recent developments of the technology, dealing with films, getters and manufacturing processes, can be also applied, with minor changes, to other micro porous fillers. 

The getter in VIP technology has several roles, as demonstrated by the following examples a) Life insurance... 

The author would like to thank Dr. Paolo della Porta, President and CEO of SAES Getters SpA, for his continuous support and long lasting commitment to VIP technology. The author also acknowledges Dr. Bruno Ferrario, Corporate R D Director, for fruitful... 

Bulk getter (vacuum technology) A mass of material that retains gases that diffuse into it. See also Getter. 

Getter (vacuum technology) A material that will react with or adsorb reactive gases in the vacuum environment. 

Getter (vacuum technology) To remove gases either by a chemical reaction so as to form non-volatile solid species containing the gas, or by absorption of the gases in the getter material. 

Sublimation pump (vacuum technology) A capture (getter) pump in which the getter material is periodically renewed by sublimation from a solid source. Example Titanium sublimation pump. See also Vacuum pump. 

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