Use of an essentially impermeable transfer belt for a soft tissue paper machine for conducting a soft tissue web through a shoe press nip in the press section of the paper machine, and from the shoe press nip to a Yankee cylinder in the dryer section of the paper machine in a closed draw. The shield, coil and semiconductor plate are positioned to prevent substantial coil generated electric field components from being incident on the semiconductor plate. A counterdoped intrinsic base region is formed on the upper surface of the substrate between the pair of the STI regions with a margin between the intrinsic base region and the pair of STI regions, the intrinsic base region having edges. An initiator is actuatable to produce combustion products in the chamber that act on the member to move the member in a first direction in the chamber to strike the end wall. When in the first position, a first portion of the moveable thermal member can overlap at least a portion of the stationary thermal member.