Slowly relaxing charge in lead borosilicate glass passive coatings studied by isothermal capacitance relaxation

The effective surface charge density in passive lead borosilicate glass coatings on a semiconductor surface was determined by the isothermal capacitance relaxation measurements. It was found that an increase in the temperature of coating formation is accompanied by increase in the effective surface charge density. This relationship is explained by the growth in concentration of the charge trapping centers with increasing content of a crystalline phase in the bulk of glass.

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