| 摘要 |
A low concentration gas delivery system utilizing a sorbent-based gas storage and delivery unit including a gas storage and dispensing vessel joined in flow communication with a permeation structure. The storage and dispensing vessel contains a solid-phase physical sorbent medium holding a fluid, which is selectively dispensed from the vessel by pressure differential, concentration differential and/or thermal desorption techniques. The dispensed gas flows to the permeation structure, wherein the desorbed fluid is diffusionally released either as a neat fluid, or into a carrier gas in which the desorbed fluid has a precisely maintained concentration, for applications such as calibration of instruments monitoring fluid concentrations, delivery of dopants for fabrication of microelectronic device structures, or other end use application requiring a precise low concentration of fluid.
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