Abstract:
An apparatus for storage and dispensing of a gas, comprising a gas storage and dispensing vessel holding a physical sorbent medium and gas adsorbed on the physical sorbent medium, wherein a carrier gas, e.g., helium, hydrogen, argon, etc., is flowed through the vessel to effect desorption of the sorbate gas and entrainment of the desorbed gas in the carrier gas stream. The storage and dispensing system of the invention may be employed to provide the dispensed sorbate gas to a downstream locus of use in applications such as epitaxial film formation and ion implantation, in the manufacture of semiconductor devices.
Abstract:
A germane storage and dispensing system, in which germane gas is sorptively retained on an activated carbon sorbent medium in a vessel containing adsorbed and free germane gas. The activated carbon sorbent medium is deflagration-resistant in relation to the germane gas adsorbed thereon, i.e., under deflagration conditions of 65 DEG C and 650 torr, under which free germane gas undergoes deflagration, the activated carbon sorbent medium does not sustain deflagration of the adsorbed germane gas or thermally desorb the germane gas so that it undergoes subsequent deflagration. The deflagration-resistance of the activated carbon sorbent medium is promoted by pre-treatment of the sorbent material to remove extraneous sorbables therefrom and by maintaining the fill level of the sorbent medium in the gas storage and dispensing vessel at a substantial value, e.g., of at least 30 %.