| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that the electrical characteristic such as threshold voltage for driving is liable to fluctuate with time in a conventional solid-state image pickup device having gate electrodes to which a relatively high voltage is applied and gate electrodes to which a relatively low voltage is applied. SOLUTION: An ON film or an ONO film is used as gate insulating film for gate electrodes to which a relatively low voltage is applied and an oxide insulating film is used as gate insulating film for gate electrodes to which a relatively high voltage is applied.
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