The charge dynamics of thermally wet grown SiO/sub 2/ electret by corona charging method with constant grid current

In this paper, the decay of the space charge in SiO/sub 2/ electrets which were corona charged with different parameters of constant grid current was observed, and was compared to that with constant grid voltage. The shift of the centroid of space charges in the sample was determined by capacitance-voltage (C-V) analysis technique. By using these experimental results, the storage and transportation of the space charge in the SiO/sub 2/ electrets was analyzed.