A reagent container assembly adapted for being installed in a cavity of an analyzer. The circuit includes an RF transformer having a primary winding and a secondary winding. Ionic wind air currents are generated by producing multiple micro-plasma events using micro-springs disposed in a pattern to produce a pressure differential that causes air movement over the micro-springs. The problem is solved in that the antenna comprises at least one patch comprising an electrically conductive material and having an upper and lower face, the at least one patch being supported on its lower face by an intermediate material comprising a material having a negative magnetic permeability andor a negative electrical permittivity, at least over a part of the predefined frequency range. The hook-connector further includes a hook member attached to a first end of at least one of the first or second plates. These steps to selectively widen portions of the mask pattern are performed so that more uniform center-to-edge critical dimensions can be achieved when the mask pattern is used to support photolithographically patterning of underlying layers.