New A plunger having a cylindrical hollow body 20 or 20B, a handle 30, 30A, or 30B, an outlet hose 40, an outlet tip 42, and a valve or flap 50, 60, or 70 structure that is able to controls the air flow within the hollow 25 portion of the cylindrical body 20 or 20B is shown. The method includes selecting a first parameter for monitoring during a semiconductor fabrication process. One embodiment of the glass frit includes B2O3, and can further include ZnO, Al2O3 andor combinations thereof. The MIG includes inner and outer anodes, with a single cathode located between the anodes. The device may also include means for controlling the transmural depth at which the ablation tips are inserted into the cardiac tissue.