| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve time controllability of an electronic timer which can control influence on the operation life of an aging device of mixture of defective bits and production variations of structure parameter of the aging device. <P>SOLUTION: The semiconductor device is provided with a plurality of cells 31 deposited on a semiconductor substrate, each of which includes a floating gate formed on the substrate via a gate insulating film, switch elements 32 connected respectively in direct to these cells 31, and a sense circuit 34 for comparing the current flowing into the cells 31 with the predetermined reference value. The cell 31 is designed to provide the Weibull distribution as the distribution of initial current value, the initial current values of cells 31 are arranged from the lower value, the cells around 63.21% of the entire cells in the predetermined range, and the cells not selected are disconnected with the switch element 32. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
