Patent ID: 6018170
Filing Date: 2000-01-25
Classification: H01L

Abstract:
A charge coupled device comprising:a semiconductor substrate of a first conductivity type;a first silicon oxide layer formed on said semiconductor substrate;a silicon nitride layer formed on said first silicon oxide layer;a second silicon oxide layer; anda plurality of pairs of charge transfer electrodes in series formed on said second silicon oxide layer,an amount of stationary charges trapped at one of an interface between said first silicon oxide layer and said silicon nitride layer and an interface between said silicon nitride layer and said second silicon oxide layer under one of each pair of said pairs of charge transfer electrodes being different from an amount of stationary charges trapped at one of an interface between said first silicon oxide layer and said silicon nitride layer and an interface between said silicon nitride layer and said second silicon oxide layer under the other of each pair of said pairs of charge transfer electrodes.