发明名称 |
SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREFOR |
摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor device where the speed of individual sense amplifiers is prevented from dropping due to the driving of multiple sense amplifiers. SOLUTION: A P-type well layer 6 including P-type impurities is selectively disposed on the main face of an epitaxial layer 3. An N-type bottom layer 7 including N-type impurities is disposed so that it is brought into contact with the base of the P-type well layer 6. A P-type well layer 2 is arranged thick to reach the N-type bottom layer 7. The N-type bottom layer 7 and the P-type well layer 2 form a PN junction. An N-type well layer 4 including N-type impurities and a P-type well layer 5 including P-type impurities are selectively disposed on the main faces of the epitaxial layers 3 so that they sandwich the P-type well layer 6. |
申请公布号 |
JP2003078032(A) |
申请公布日期 |
2003.03.14 |
申请号 |
JP20010268607 |
申请日期 |
2001.09.05 |
申请人 |
MITSUBISHI ELECTRIC CORP |
发明人 |
KUNIKIYO TATSUYA;HAMAMOTO TAKESHI;TANAKA YOSHINORI |
分类号 |
H01L21/8242;G11C7/06;G11C11/4091;H01L27/108;H03K19/00 |
主分类号 |
H01L21/8242 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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