摘要:
An apparatus which can neutralize charged bodies such as processed substrates for semiconductor devices and for flat display, free from electromagnetic noise, impurity contamination, and residual potentials. To process in a prescribed way a wafer (5) to be processed, the wafer (5) is, for example, moved from a pretreatment chamber (2) to a low pressure reaction chamber (3). In this case, a gas, which does not react on the wafer, such as nitrogen and argon, is introduced into the pretreatment chamber (2), and is kept under a predetermined pressure by a vacuum pump (15). Then, ultraviolet rays are projected in the pretreatment chamber (2) from an ultraviolet rays lamp (11) constituting a means for generating neutralization charges, and positive and negative floating charged particles (electrons and positive ions) are generated by exciting the atmosphere in the chamber (2). Since the charges are removed by projecting the ultraviolet rays from the outsides of a case (1) and the case (2) and moreover in a non- contact way, no electromagnetic noise is generated and the residual potentials are vanished too.
摘要:
A welding system for superhigh purity gas supply pipe system, capable of removing easily and completely the metals deposited, during the installation of the superhigh purity gas pipe system, on the outer surfaces of the portions of the pipes which are closed to the portions to be welded thereof and on the inner portions of these pipes, and capable of setting up a superhigh purity gas supply system in a short period of time. A welding system for the gas supply pipe system in which a plurality of members are connected together by welding, characterized in that a first member to be welded (113) is provided with a means for supplying an inert gas or a welding back seal gas and a means for supplying superpure water, a second member to be welded (114) being provided with a means for discharging the inert gas or back seal gas and a means for discharging the superpure water, the first and second members being welded as the inert gas or back seal gas is being supplied, the superpure water being supplied after the welding of these members has been completed, whereby the metal fume deposited on the surfaces of the welded members during the welding thereof can be washed out.
摘要:
A superhigh purity gas supply pipe system adapted to prevent a semiconductor device of high cleanliness, into which a gas is introduced through a gas supply pipe system, from being contaminated with the metals or the like deposited during the welding thereof, and a method of installing such a gas supply pipe system. The superhigh purity gas supply pipe system according to the present invention is a pipe system consisting of gas supply pipe system parts having welded portions, characterized in that the gas supply pipe system parts having such welded portions are washed with superhigh purity water before, during or after the installation of the pipe system. The invention also provides a method of installing a superhigh purity gas supply pipe system having welded portions, characterized in that pipe system members are welded as an inert gas or a back seal gas is being introduced into at least these members, superhigh purity water being introduced into the welded members after the welding of these members so as to wash out the metal fume deposited on the inner surfaces of the welded members during the welding thereof.
摘要:
An analyzer capable of detecting a light element, such as Na, capable of evaluating a sample having an uneven surface, such as pattern-carrying wafer without destroying and damaging the same, with simple construction and simple operation, and safely to the human body, and capable of identifying the composition of a minute amount of impurities and fine particles deposited on the surface of a sample. This analyzer is characterized in that it has a sample retaining stage, an ultraviolet ray-emitting light source, a means for collecting the ultraviolet rays sent out from the light source and applying the resultant rays to the surface of a sample, and a means for detecting the light emitted from the surface of the sample to which the ultraviolet rays have been applied.