An implantation device for releasably holding implantable microstimulators can be used to guide one or more microstimulators to any site within the gastrointestinal tract for implantation. An explosive apparatus contains an explosive material in close proximity with a carrier containing microorganisms. The deflecting means are configured to deflect jets of respiratory gas injected into the main ckannel through the auxiliary channels so as to converge the gas at a point of convergence inside the main channel. The metal capping layer can extend over structures other than the bond pads, such as to cover at least 80% of the area of the IC die to provide structures on the IC die protection from incident radiation. Additionally, some channels may be reused both amongst sectors of a given cell and in other cells of the coverage area.