发明授权
US4362575A Method of making buried channel charge coupled device with means for controlling excess charge 失效
用于控制过量电荷的装置的掩埋通道电荷耦合器件的方法

Method of making buried channel charge coupled device with means for
controlling excess charge
摘要:
The preferred embodiment of a method of making a buried channel CCD starts with a body of P type semiconductor material over which an oxide layer and a photoresist are deposited. Openings are formed to expose regions of the body surface where drains are to be formed and N type impurity atoms are implanted through the openings. The openings are then enlarged to expose an additional area of the surface surrounding the drains and P type atoms are implanted through the enlarged openings to form channel stops. Afterward, the surface of the body is exposed and N type atoms are implanted to form buried channel regions on each side of the channel stops and to convert a thin layer of the channel stops to lightly doped compensation regions extending between the drains and the buried channel regions.
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