Patent ID: 7123509

Claim:
A semiconductor integrated circuit device, comprising: a semiconductor layer formed via an embedded insulation film on a substrate; an FBC (Floating Body Cell) which stores data by accumulating a majority carrier in a floating channel body formed on said semiconductor layer; and a sense amplifier which performs control for reading out data stored in said FBC, wherein said sense amplifier includes: a hold circuit which holds by reading out data stored in a selected FBC; a writing control circuit which performs control for reading out data stored in the selected FBC, writing data “1” with a larger number of holes into the selected FBC, and writing intermediate data whose body potential is less than data “1” and more than data “0” with a smaller number of holes into the selected FBC; and a comparison circuit which reads out the intermediate data stored in the selected FBC, and compares the read-out data with data held by said hold circuit.