| 摘要 |
PROBLEM TO BE SOLVED: To easily obtain a body contact while reducing the magnitude of parasitic resistance on a source side and suppressing the change of a pinch-off point. SOLUTION: A P<SP>-</SP>type impurity layer 7 for threshold value control is formed only near to the source side of the channel region while an N<SP>-</SP>impurity layer 6 is formed only on a drain side. Furthermore, the N<SP>-</SP>impurity layer 6 and an N<SP>+</SP>impurity layer 10 are formed so as to reach an insulating layer 1, and the P<SP>-</SP>type impurity layer 7 and N<SP>+</SP>impurity layer 8 are formed so as to be separated from the insulating layer 1. COPYRIGHT: (C)2003,JPO
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