Patent ID: 7347975

Claim:
A system for channeling a plurality of submillimeter beads to desired locations on a substrate, comprising: an array of micro-bead supports, each support adapted to releasably hold from above, no more than one submillimeter bead at a time; a reagent plate comprising a plurality of reagent-supply locations disposed in an array having center-to-center spacing substantially the same as that of the micro-bead support array; a conduit assembly comprising a plurality of conduits disposed in a position under said micro-bead support array, said conduits having (i) large openings at their upper ends disposed in an array having a center-to-center pitch like that of the support array such that the large openings are generally alignable thereunder, and (ii) small openings at their lower ends; and a motor for moving the micro-bead support array back and forth from a position centered above the reagent plate to the position centered above the conduit assembly.