Patent ID: 6403992
Filing Date: 2002-06-11
Classification: H01L

Abstract:
A complementary metal-oxide semiconductor (CMOS) device with an N-type substrate, comprising:a high voltage CMOS, which includes a high voltage PMOS and a high voltage NMOS, wherein the high voltage PMOS has a source and a substrate connected to a positive voltage source, and an N-well, and the high NMOS has a source and a substrate connected to a negative voltage source, and a P-well; a low voltage CMOS, which includes a low voltage PMOS and a low voltage NMOS, wherein the low voltage PMOS has a source and a substrate connected to a positive voltage source lower than the positive voltage source connected to the source of the high voltage PMOS, and an N-well, and the low voltage NMOS has a source and a substrate connected to a negative voltage source higher than that connected to the source of the high voltage NMOS, and a P-well; a substrate, wherein the substrate is a common substrate shared by the high voltage CMOS and the low voltage CMOS; and a circuit converter, to raise an operation voltage of the low voltage PMOS in the low voltage CMOS up to the same as that of the high voltage PMOS in the high voltage CMOS.