Experimental research on ignition LTNR by micro semiconductor bridge

The optimal parameters such as aspect ratio, angle, bridge area and mass of the SCB/LTNR firing devices were studied in this paper. By analyzing fire phenomenon and resistance characteristics in dimension with 20 μm long×50 μm wide of the semiconductor bridge, two ignition mechanisms can be found. One is called electro-thermal ignition by heat conduction from SCB into the energetic material for ignition, whose corresponding bridge area is 7.65×10^-10 m² and the mass is 3.55×10^-9 g. The other is called electro-explosive, by a convective process from SCB into the energetic materials involving the transport of the silicon vapor into LTNR, whose corresponding area is 5.68×10^-10 m² and the mass is 2.64×10^-9 g.