Methods, apparatuses and article of manufactures for receiving a plurality of bids and offers for a binary options transaction. The recessed channel portion permits the use of relatively thicker sourcedrain regions thereby providing lower sourcedrain extension resistivity while maintaining the physical separation needed to overcome various short channel effects. An oxygen outlet nozzle is removably and exchangeably fastened to each outlet. In various embodiments the semiconductor device will not function until the pad portions are electrically coupled, and in other embodiments the functionality of the device may be selectively controlled by connecting selected pad portions from a plurality of pad portions. The spacer material cleans the emitter by absorbing gases during fabrication of the display device and desorbing emitter-cleaning gases during operation of the display device. Since the printing device includes a plurality of nozzle units that can individually control the amount of printing material flowing out of the printing device, the amount of printing material can be easily controlled and regulated.