Low Ignition Energy, High Security, Semiconductor Bridge

The thesis mainly studies the influence of the doping impurity ratio, shape, weight,ratio of length to width on the firing time and the energy consumed in the process of firingto the SCB, under the condition of capacitance discharge. The results can supply referencedata for the design of the low energy SCB. Up and down method is used to study the safetycurrent of the SCB for different dimensions. Semiconductor arrester is used between feet andhull to enhance the ability of anti—electrostatic discharge.Major conclusions from this study are summarized as follows:(1) For N-doped SCB, the doping impurity ratio has a prime point. (2) Thesharp-angle whose shape is "V" on the both sides of the SCB decreases the firing time andthe firing energy of SCB. The sharp-angle and holes on the center of the SCB holeinfluence the firing behavior of SCB largely. (3)The firing time presents exponentialincreased as the weight of the SCB increases. The firing energy increases as the weight ofthe SCB increases. (4)For both of the firing time and the firing energy present exponentialdecrease as the ratio of length to width increases. (5)We can decrease the firing energythrough choosing appropriate doping impurity ratio and the figure, enlarging the ratio oflength to width, reducing the weight of SCB. The lowest firing energy of SCB initiater is0.846mJ in this experiment.(6) The safety current decreases as the ratio of length to widthof the SCB increases when the quantity is the same. The safety current increases as thequantity of the SCB increases when the ratio of length to width is the same.(7)Semiconductor arrester used between the feet and the hull of SCB initiater can enhance theability of anti—electrostatic discharge effectively. So it is feasible to design the SCBinitiater which having low firing energy and high security.