Patent ID: 6627960
Filing Date: 2003-09-30
Classification: G11C,H01L,Y10S

Abstract:
A semiconductor data storage apparatus comprising:a first inverter having an input connected to a first node and an output connected to a second node; a second inverter haying an input connected to the second node and an output connected to the first node; a first MOS transistor having a gate electrode connected to the second node and a source electrode and a drain electrode, one of the source and drain electrodes being connected to the first node; and a second MOS transistor having a gate electrode connected to the first node and a source electrode and a drain electrode, one of the source and drain electrodes being connected to the second node, wherein said first inverter includes a third MOS transistor of a first conductivity type, having a gate electrode connected to the first node and a source electrode and a drain electrode, one of the source and drain electrodes being connected to the second node, and a fourth MOS transistor of a second conductivity type, having a gate electrode connected to the first node and a source electrode and a drain electrode, one of the source and drain electrodes being connected to the second node; said second inverter includes a fifth MOS transistor of the first conductivity type, having a gate electrode connected to the second node and a source electrode and a drain electrode, one of the source and drain electrodes being connected to the first node, and a sixth MOS transistor of the second conductivity type, having a gate electrode connected to the second node and a source electrode and a drain electrode, one of the source and drain electrodes being connected to the first node; one of the source and drain electrodes of said second MOS transistor and one of the source and drain electrodes of the one of said third and fourth MOS transistors, which is of the same conductivity type as said second MOS transistor, share a common diffusion region, and one of the source and drain electrodes of said first MOS transistor and one of the source and drain electrodes of one said fifth and sixth MOS transistors, which is of the same conductivity type as said first MOS transistor, share a common diffusion region.