Strengthened Complementary Metal-Oxide-Semiconductor Logic for Small-Band-Gap Semiconductor-Based High-Performance...

Area of Science:

• Solid State Physics
• Materials Science
• Electrical Engineering

Background:

• Silicon-based complementary metal-oxide-semiconductor (CMOS) technology faces performance limitations for modern digital integrated circuits (ICs).
• Alternative semiconductors with high carrier mobility offer performance benefits but suffer from small or zero band gaps, causing significant leakage current and voltage loss.
• Existing solutions struggle to balance high performance with low power consumption in ICs.

Purpose of the Study:

• To propose and demonstrate a novel logic style, strengthened CMOS (SCMOS), to overcome the limitations of current IC technologies.
• To enable the use of high-mobility, small-band-gap semiconductors in ICs without compromising performance or increasing power consumption.
• To achieve both high operating speed and significantly reduced static power consumption.

Main Methods:

• Modification of conventional complementary metal-oxide-semiconductor field-effect transistors (FETs) into an asymmetric structure.
• Introduction of an additional assistant gate near the drain of the FETs to modulate the potential barrier.
• Construction of strengthened CMOS integrated circuits using these modified asymmetric FETs.

Main Results:

• Demonstrated perfect rail-to-rail output with negligible voltage loss in SCMOS integrated circuits.
• Achieved a three-orders-of-magnitude suppression of static power consumption compared to conventional methods.
• Observed operating speeds comparable to or exceeding those of traditional CMOS integrated circuits.

Conclusions:

• The strengthened CMOS (SCMOS) logic style effectively addresses the performance and power consumption challenges posed by small-band-gap semiconductors.
• SCMOS technology, demonstrated with carbon nanotubes, is adaptable to various small-band-gap materials for advanced IC applications.
• This approach offers a viable path towards high-performance, low-power integrated circuits utilizing novel semiconductor materials.