首页> 外国专利> Contactless method for measuring total charge of an oxide layer on a semiconductor wafer using corona charge

Contactless method for measuring total charge of an oxide layer on a semiconductor wafer using corona charge

机译:使用电晕电荷测量半导体晶片上氧化物层总电荷的非接触方法

摘要

A method of measuring total charge of an insulating layer on a semiconductor substrate includes applying corona charges to the insulating layer and measuring a surface photovoltage of the insulating layer after applying each of the corona charges. The charge density of each of the corona charges is measured with a coulombmeter. A total corona charge required to obtain a surface photovoltage of a predetermined fixed value is determined and used to calculate the total charge of the insulating layer. The fixed value corresponds to either a flatband or midband condition.
机译:一种测量半导体衬底上的绝缘层的总电荷的方法,包括:向绝缘层施加电晕电荷;以及在施加每个电晕电荷之后,测量绝缘层的表面光电压。用库仑计测量每个电晕电荷的电荷密度。确定获得预定的固定值的表面光电压所需的总电晕电荷,并将其用于计算绝缘层的总电荷。固定值对应于平坦带或中带条件。

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