Impact of actively body-bias controlled (ABC) SOI SRAM by using direct body contact technology for low-voltage application

Actively Body-bias Controlled (ABC) SOI SRAM that has a new cell structure including connections of the access and the driver transistor´s bodies to the word line is proposed to realize low-voltage operation. We developed the direct body contact technology to apply forward biases to the bodies without area penalties and increases of parasitic gate capacitances by using the hybrid trench isolation for the first time. Moreover, the standby current does not change because the body bias is not applied when the word-line voltage is low level. It is successfully demonstrated that low-voltage and high-speed operation is achieved by using the ABC SOI SRAM.