A contact in a semiconductor memory device is formed on an active region of a cell array region, rather than on a sloped area between the cell array region and a core region. The cell block may include a plurality of actual cell contacts formed using a mask. The catheter is fluidically coupled to a console that provides a heated or cooled heat transfer working fluid to exchange heat with the heat transfer element, thereby heating or cooling blood. The flash lamps and their associated stored values are preferably incorporated into a replaceable cartridge that facilitates user maintenance of the dermatologic treatment device. For each group, a message content to which the group is most responsive is identified and is associated with the group. Such packets are particularly suited to an electrostatic trap because the FWHM of each packet’s TOF distribution is less than the period of oscillation of those ions in the electrostatic trap.