The Experts below are selected from a list of 138 Experts worldwide ranked by ideXlab platform
Mayu Aoki - One of the best experts on this subject based on the ideXlab platform.
-
Low-noise, high-speed data transmission using a ringing-Canceling output buffer
IEEE Journal of Solid-State Circuits, 1995Co-Authors: T. Sekiguchi, Masashi Horiguchi, Takeshi Sakata, Y. Nakagome, Shigeki Ueda, Mayu AokiAbstract:The proposed ringing-Canceling output buffer transmits a superimposed two-step pulse that almost completely cancels the ringing in the received waveform. Simulation showed that this circuit increases the noise margin by a factor of 2.6 compared to using a conventional circuit in a bus interface at a data rate of 200 MHz. A test circuit was designed and fabricated to experimentally verify the fundamental ringing-Canceling Effect. Compared with other approaches to reducing ringing, the ringing-Canceling output buffer provides a bigger improvement in the noise margin with a smaller signal-delay. This output buffer is promising for improving the data transfer rate of the memory bus.
Yunghsien Wu - One of the best experts on this subject based on the ideXlab platform.
-
MIM Capacitors Based on ${\rm ZrTiO}_{\rm x}/{\rm BaZr}_{\rm y}{\rm Ti}_{\rm 1-y}{\rm O}_{3}$ Featuring Record-Low VCC and Excellent Reliability
IEEE Electron Device Letters, 2013Co-Authors: Yunghsien Wu, Ren-siang Jiang, Meng-ting YuAbstract:Perovskite-based BaZryTi1-yO3 (BZTO) (y=0.6) with partial crystallization has been found to possess a rather high- κ value of 48.6 and positive quadratic voltage coefficient of capacitance (VCC). Through stacking BZTO and ZrTiOx as laminate dielectric, metal-insulator-metal capacitors using VCC Canceling Effect advance frontiers by exhibiting a record-low VCC of 14 ppm/V2 at the capacitance of 13.4 fF/μm2, low dielectric loss tangent , and low leakage current of 7.5×10-9 A/cm2 at -1 V. With constant voltage stress at 2.5 V for 1000 s, degradation in leakage current is observed. In addition, excellent reliability of 0.89% capacitance change against stress up to a projected of 10 years is also achieved. The aforementioned characteristics not only compare favorably to other high- κ-based dielectrics, most importantly, but also these results meet ITRS requirements set by 2024.
-
hbox zrlao _ x hbox zrtio _ x hbox zrlao _ x laminate as insulator for mim capacitors with high capacitance density and low quadratic voltage coefficient using Canceling Effect
IEEE Electron Device Letters, 2012Co-Authors: Lun Lun Chen, Yunghsien Wu, Minlin WuAbstract:Metal-insulator-metal (MIM) capacitors with ZrLaOx/ZrTiOx/ZrLaOx laminate as the insulator were explored in this work. Single ZrTiOx dielectric was found to have a negative quadratic voltage coefficient of capacitance (VCC-α) with a high κ value of 22.5. By integrating this dielectric with ZrLaOx which provides a positive VCC-α and a high κ value of 25.8, the “Canceling Effect” of VCC-α can be achieved while a high capacitance density can be maintained. MIM capacitors with the laminated structure display desirable characteristics in terms of a capacitance density of 14.6 fF/μm2, a low VCC-α of 33 ppm/V2, negligible frequency dispersion, and satisfactory leakage current of 1.6 × 10-6 A/cm2 at -1.5 V. These results also well meet the International Technology Roadmap for Semiconductors requirement set for 2020.
-
$\hbox{ZrLaO}_{x}\hbox{/ZrTiO}_{x}\hbox{/ZrLaO}_{x}$ Laminate as Insulator for MIM Capacitors With High Capacitance Density and Low Quadratic Voltage Coefficient Using Canceling Effect
IEEE Electron Device Letters, 2012Co-Authors: Lun Lun Chen, Yunghsien Wu, Minlin WuAbstract:Metal-insulator-metal (MIM) capacitors with ZrLaOx/ZrTiOx/ZrLaOx laminate as the insulator were explored in this work. Single ZrTiOx dielectric was found to have a negative quadratic voltage coefficient of capacitance (VCC-α) with a high κ value of 22.5. By integrating this dielectric with ZrLaOx which provides a positive VCC-α and a high κ value of 25.8, the “Canceling Effect” of VCC-α can be achieved while a high capacitance density can be maintained. MIM capacitors with the laminated structure display desirable characteristics in terms of a capacitance density of 14.6 fF/μm2, a low VCC-α of 33 ppm/V2, negligible frequency dispersion, and satisfactory leakage current of 1.6 × 10-6 A/cm2 at -1.5 V. These results also well meet the International Technology Roadmap for Semiconductors requirement set for 2020.
T. Sekiguchi - One of the best experts on this subject based on the ideXlab platform.
-
Low-noise, high-speed data transmission using a ringing-Canceling output buffer
IEEE Journal of Solid-State Circuits, 1995Co-Authors: T. Sekiguchi, Masashi Horiguchi, Takeshi Sakata, Y. Nakagome, Shigeki Ueda, Mayu AokiAbstract:The proposed ringing-Canceling output buffer transmits a superimposed two-step pulse that almost completely cancels the ringing in the received waveform. Simulation showed that this circuit increases the noise margin by a factor of 2.6 compared to using a conventional circuit in a bus interface at a data rate of 200 MHz. A test circuit was designed and fabricated to experimentally verify the fundamental ringing-Canceling Effect. Compared with other approaches to reducing ringing, the ringing-Canceling output buffer provides a bigger improvement in the noise margin with a smaller signal-delay. This output buffer is promising for improving the data transfer rate of the memory bus.
-
Regular Issue Brief Papers Low-Noise, High-speed Data Transmission Using a Ringing-Canceling Output Buffer
1995Co-Authors: T. Sekiguchi, Masashi Horiguchi, Takeshi Sakata, Y. Nakagome, Shigeki Ueda, Masakazu AokiAbstract:The proposed ringing-Canceling output buffer trans- mits a superimposed two-step pulse that almost completely can- cels the ringing in the received waveform. Simulation showed that this circuit increases the noise margin by a factor of 2.6 compared to using a conventional circuit in a bus interface at a data rate of 200 MHz. A test circuit was designed and fabricated to experimentally verify the fundamental ringing- Canceling Effect. Compared with other approaches to reducing ringing, the ringing-Canceling output buffer provides a bigger improvement in the noise margin with a smaller signal-delay. This output buffer is promising for improving the data transfer rate of the memory bus.
Masao Kikuchi - One of the best experts on this subject based on the ideXlab platform.
-
Spot Radiative Ignition and Subsequent Three Dimensional Flame Spread Over Thin Cellulose Fuels
2013Co-Authors: Sandra L. Olson, Takashi Kashiwagi, Masao Kikuchi, Osamu Fujita, Kenichi ItoAbstract:Spontaneous radiative ignition and transition to flame spread over thin cellulose fuel samples was studied aboard the USMP-3 STS-75 Space Shuttle mission, and in three test series in the 10 second Japan Microgravity Center (JAMIC). A focused beam from a tungsten/halogen lamp was used to ignite the center of the fuel sample while an external air flow was varied from 0 to 10 cm/s. Non-piloted radiative ignition of the paper was found to occur more easily in microgravity than in normal gravity. Ignition of the sample was achieved under all conditions studied (shuttle cabin air, 21%-50% O2 in JAMIC), with transition to flame spread occurring for all but the lowest oxygen and flow conditions. While radiative ignition in a quiescent atmosphere was achieved, the flame quickly extinguished in air. The ignition delay time was proportional to the gas-phase mixing time, which is estimated using the inverse flow rate. The ignition delay was a much stronger function of flow at lower oxygen concentrations. After ignition, the flame initially spread only upstream, in a fan-shaped pattern. The fan angle increased with increasing external flow and oxygen concentration from zero angle (tunneling flame spread) at the limiting 0.5 cm/s external air flow, to 90 degrees (semicircular flame spread) for external flows at and above 5 cm/s, and higher oxygen concentrations. The fan angle was shown to be directly related to the limiting air flow velocity. Despite the convective heating from the upstream flame, the downstream flame was inhibited due to the 'oxygen shadow' of the upstream flame for the air flow conditions studied. Downstream flame spread rates in air, measured after upstream flame spread was complete and extinguished, were slower than upstream flame spread rates at the same flow. The quench regime for the transition to flame spread was skewed toward the downstream, due to the augmenting role of diffusion for opposed flow flame spread, versus the Canceling Effect of diffusion at very low cocurrent flows.
-
experimental observations of spot radiative ignition and subsequent three dimensional flame spread over thin cellulose fuels
Combustion and Flame, 2001Co-Authors: Sandra L. Olson, Takashi Kashiwagi, Osamu Fujita, Masao KikuchiAbstract:Abstract Non-piloted radiative ignition and transition to flame spread over thin cellulose fuel samples was studied aboard the USMP-3 STS-75 Space Shuttle mission, and in three test series in the 10 second Japan Microgravity Center (JAMIC). A focused beam from a tungsten/halogen lamp was used to ignite the center of the fuel sample while an external air flow was varied from 0 to 10 cm/s. Non-piloted radiative ignition of the paper was found to occur more easily in microgravity than in normal gravity. Ignition of the sample was achieved under all conditions studied (shuttle cabin air, 21%–50% O 2 in JAMIC), with transition to flame spread occurring for all but the lowest oxygen and flow conditions. Although radiative ignition in a quiescent atmosphere was achieved, the flame quickly extinguished in air. The ignition delay time was proportional to the gas-phase mixing time, which is estimated by using the inverse flow rate. The ignition delay was a much stronger function of flow at lower oxygen concentrations. After ignition, the flame initially spread only upstream, in a fan-shaped pattern. The fan angle increased with increasing external flow and oxygen concentration from zero angle (tunneling flame spread) at the limiting 0.5 cm/s external air flow, to 90 degrees (semicircular flame spread) for external flows at and above 5 cm/s, and higher oxygen concentrations. The fan angle was shown to be directly related to the limiting air flow velocity. A surface energy balance reveals that the heat feedback rate from the upstream flame to the surface decreases with decreasing oxygen mass transport via either imposed flow velocity or ambient oxygen concentration. Quenching extinction occurs when the heat feedback rate from the flame is no longer sufficient to offset the ongoing surface radiative heat losses. Despite the convective heating from the upstream flame, the downstream flame was inhibited due to the ‘oxygen shadow’ of the upstream flame for the air flow conditions studied. Downstream flame spread rates in air, measured after upstream flame spread was complete and extinguished, were slower than upstream flame spread rates at the same flow. The quench regime for the transition to flame spread was skewed toward the downstream, because of the augmenting role of diffusion for opposed flow flame spread, versus the Canceling Effect of diffusion at very low cocurrent flows.
Minlin Wu - One of the best experts on this subject based on the ideXlab platform.
-
hbox zrlao _ x hbox zrtio _ x hbox zrlao _ x laminate as insulator for mim capacitors with high capacitance density and low quadratic voltage coefficient using Canceling Effect
IEEE Electron Device Letters, 2012Co-Authors: Lun Lun Chen, Yunghsien Wu, Minlin WuAbstract:Metal-insulator-metal (MIM) capacitors with ZrLaOx/ZrTiOx/ZrLaOx laminate as the insulator were explored in this work. Single ZrTiOx dielectric was found to have a negative quadratic voltage coefficient of capacitance (VCC-α) with a high κ value of 22.5. By integrating this dielectric with ZrLaOx which provides a positive VCC-α and a high κ value of 25.8, the “Canceling Effect” of VCC-α can be achieved while a high capacitance density can be maintained. MIM capacitors with the laminated structure display desirable characteristics in terms of a capacitance density of 14.6 fF/μm2, a low VCC-α of 33 ppm/V2, negligible frequency dispersion, and satisfactory leakage current of 1.6 × 10-6 A/cm2 at -1.5 V. These results also well meet the International Technology Roadmap for Semiconductors requirement set for 2020.
-
$\hbox{ZrLaO}_{x}\hbox{/ZrTiO}_{x}\hbox{/ZrLaO}_{x}$ Laminate as Insulator for MIM Capacitors With High Capacitance Density and Low Quadratic Voltage Coefficient Using Canceling Effect
IEEE Electron Device Letters, 2012Co-Authors: Lun Lun Chen, Yunghsien Wu, Minlin WuAbstract:Metal-insulator-metal (MIM) capacitors with ZrLaOx/ZrTiOx/ZrLaOx laminate as the insulator were explored in this work. Single ZrTiOx dielectric was found to have a negative quadratic voltage coefficient of capacitance (VCC-α) with a high κ value of 22.5. By integrating this dielectric with ZrLaOx which provides a positive VCC-α and a high κ value of 25.8, the “Canceling Effect” of VCC-α can be achieved while a high capacitance density can be maintained. MIM capacitors with the laminated structure display desirable characteristics in terms of a capacitance density of 14.6 fF/μm2, a low VCC-α of 33 ppm/V2, negligible frequency dispersion, and satisfactory leakage current of 1.6 × 10-6 A/cm2 at -1.5 V. These results also well meet the International Technology Roadmap for Semiconductors requirement set for 2020.