Patent ID: 8210119

Claim:
A spotter for depositing a substance on a surface in an ordered pattern, the spotter comprising: a plurality of fluid pathways, wherein each fluid pathway independently comprises at least first conduit and a second conduit, the first and second conduits each having a proximal and a distal end, the first and second conduits each having a wall defining a channel in the first and second conduits, wherein the distal end of the first conduit and the distal end of the second conduit join to form an orifice, wherein the orifice is adapted to form a seal with a surface, thereby forming a plurality of independent fluid pathways having a plurality of orifices adapted to form a seal with a surface, wherein each fluid pathway is configured such that fluid is flowable in one direction through the first conduit, over the surface, and then through the second conduit when the orifice is sealed against the surface; the plurality of the orifices configured in a static array adapted to dispose fluid on the surface in an ordered pattern.