Figure 3.

Solid models and actual images of the coating fixtures. The PC coatings were applied with a spray coating system and a shadow mask as illustrated in (a), solid model, and (b), photograph of the machined coating assembly. As shown in (a), multiple devices can be coated simultaneously. Coating of the GC column is accomplished with temporary fluidic connections (c) and (d). Two short sections of polyimide-coated, fused silica capillary can be seen protruding from the coating fixture lid. These are used to temporarily connect the GC to the sources of stationary phase coating materials.