Abstract: A portable fuel cell device (10) includes a fuel reservoir (26) and an oxidant chamber (34). Gaseous fuel from the fuel reservoir (26) is mixed with an oxidant from the oxidant chamber (34) by an aspirator (42) to form a fuel-oxidant mixture. The fuel-oxidant mixture is passed through a fuel-oxidant line (44) into a fuel cell (13). The fuel cell (13) contains a reaction chamber (20) that generates electricity by reacting the fuel-oxidant mixture. Waste gaseous products, such as water and carbon dioxide, are sent through an exhaust line (24) to a water trap (46). The water trap (46) contains a water absorbing medium (52) for absorbing the water vapor from the exhaust gas, thereby forming a dry exhaust gas. The dry exhaust gas is released through the exhaust vent (48) into the ambient atmosphere.

Abstract: A solution (20) is dispensed onto bond pads (18) on a substrate (14). An integrated circuit component (12) that includes solder bumps (16) formed on component bond pads (30) is superposed onto the substrate (14) such that the solder bumps (16) rest against the bond pads (18). The solution (20) includes an anhydride compound that acts as a fluxing agent. The subassembly (11) is heated to a temperature sufficient to bond the solder bumps (16) to the bond pads (18) to form solder bump interconnections (26). During the bonding process, the fluxing agent substantially vaporizes and leaves virtually no residue on the substrate (14) to allow the component (12) to be effectively underfilled with a polymeric encapsulant (24).