Double metal cyanide catalysts are complexed with complexing agents that are miscible in poly at higher temperatures and immiscible at lower temperatures. To open the access panel, a latch is actuated to first release a lower edge of the panel. Each vertical active pattern extends through each of the cell gates stacked under the first string selection gates. Two or more sensing circuit outputs can simultaneously turn to lower or higher level than a predetermined threshold level. One end of the electron emitter extends out of the first metal plate and the second metal plate to act as an electron emission end. According to an embodiment of the invention, the bipolar transistor can comprise a substrate, a collector comprising a plurality of alternating doped regions, wherein the plurality of alternating doped regions alternate in a lateral direction from a net first conductivity to a net second conductivity, and a collector contact in electrical contact with the collector.