Static information storage and retrieval – Systems using particular element – Flip-flop
Reexamination Certificate
2006-02-27
2008-08-26
Yoha, Connie C (Department: 2827)
Static information storage and retrieval
Systems using particular element
Flip-flop
C365S156000, C365S226000
Reexamination Certificate
active
07417889
ABSTRACT:
Techniques are provided for employing independent gate control in asymmetrical memory cells. A memory circuit, such as an SRAM circuit, can include a number of bit line structures, a number of word line structures that intersect the bit line structures to form a number of cell locations, and a number of asymmetrical memory cells located at the cell locations. Each of the asymmetrical cells can be selectively coupled to a corresponding one of the bit line structures under control of a corresponding one of the word line structures. Each of the cells can include a number of field effect transistors (FETS), and at least one of the FETS can be configured with separately biased front and back gates. One gate can be biased separately from the other gate in a predetermined manner to enhance read stability of the asymmetrical cell.
REFERENCES:
patent: 5673230 (1997-09-01), Kuriyama
patent: 5986924 (1999-11-01), Yamada
patent: 6198656 (2001-03-01), Zhang
patent: 6573549 (2003-06-01), Deng et al.
patent: 6831483 (2004-12-01), Shimazaki et al.
patent: 7177177 (2007-02-01), Chuang et al.
patent: 7200030 (2007-04-01), Yamaoka et al.
Hodges & Jackson's textbook “Analysis and Design of Integrated Circuits,” 2nd edition, at pp. 364-368 (New York, McGraw Hill, 1988).
Chuang et al., “Back-Gate Controlled Asymmetrical Memory Cell and Memory Using the Cell,” U.S. Appl. No. 11/362,613, filed Feb. 27, 2006.
Chuang et al., “Asymmetrical Memory Cells and Memories Using the Cells,” U.S. Appl. No. 11/392,071, filed Mar. 29, 2006.
Kuriyama et al., “An Asymmetric Memory Cell using a C-TFT for ULSO SRAMs,” Symposium on VLSI Technology Digest of Technical Papers, pp. 38-39 (1992).
Itabashi et al., “A Split Wordline Cell for 16Mb SRAM Using Polysilicon Sidewall Contacts,” IEEE, IEDM 91 (1991).
“Taurus-Medici: Industry-standard device simulation tool,” Synopsys Data Sheet (2003).
Shang et al., “Mobility and CMOS Devices/Circuits on sub-10nm (110) Ultra Thin Body SOI,” Symposium on VLSI Technology Digest of Technical Papers, pp. 78-79 (2005).
Kim et al., “Performance assessment of scaled strained-Si channel-on-insulator (SSOI) CMOS,” Solid-State Electronics 48, pp. 239-243 (2004).
Takeda et al., “A Read-Static-Noise-Margin-Free SRAM Cell for Low-Vddand High-Speed Applications,” IEEE International Solid-State Circuits Conference, pp. 478-479, 611 (2005).
Azizi et al., “Low-Leakage Asymmetric-Cell SRAM,” IEEE Transactions on Very Large Scale Integration (VLSI) Systems, vol. 11, No. 4, pp. 701-715 (Aug. 2003).
Guo et al., “FinFET-Based SRAM Design,” ISLPED (Aug. 8-10, 2005).
Yamaoka et al., “Low Power SRAM Menu for SOC Application Using Yin-Yang-Feedback Memory Cell Technology,” Symposium on VLSI Circuits Digest of Technical Papers, pp. 288-291 (2004).
Chuang Ching-Te
Kim Jae-Joon
Kim Keunwoo
International Business Machines - Corporation
Ryan & Mason & Lewis, LLP
Yoha Connie C
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