We present a novel methodology for characterization of sub-quartermicron CMOS technologies. It involves process calibration, device calibration employing two-dimensional device simulation and automated Technology Comp...
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ISBN:
(纸本)0780372158
We present a novel methodology for characterization of sub-quartermicron CMOS technologies. It involves process calibration, device calibration employing two-dimensional device simulation and automated Technology Computer Aided design (TCAD) optimization, and, finally, transient mixed-mode device/circuit simulation. The proposed methodology was tested on 0.25 /spl mu/m technology and applied to 0.13 /spl mu/m technology in order to estimate ring oscillator speed. The simulation results show an excellent agreement with available experimental data.
On-chip inductance extraction is difficult due to the global effect of inductance, and simulating the resulting dense partial inductance matrix is even more difficult. Furthermore, it is well known that simply discard...
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ISBN:
(纸本)0780366336
On-chip inductance extraction is difficult due to the global effect of inductance, and simulating the resulting dense partial inductance matrix is even more difficult. Furthermore, it is well known that simply discarding smallest terms to sparsify the inductance matrix can render the partial inductance matrix indefinite and result in an unstable circuit model. Recently a new circuit element, K, has been introduced to capture the global effect of inductance by evaluating a corresponding sparse K matrix. However, the reason that K has such local properties is not clear, and the positive semi-definiteness of the corresponding sparse K matrix is not proved. In this paper, we present the physical interpretation of K. Based on the physical interpretation, we explain why the faraway mutual K can be ignored (locality) and prove that after ignoring faraway mutual K, the resultant K matrix is positive definite (stability). Together with a RKC equivalent circuit model, the locality and stability enables us to simulate an RKC circuit directly and efficiently for real circuits. A new circuit simulation tool, KSim, has been developed by incorporating the new circuit element K into Berkeley SPICE. The RKC simulation matches better with the full partial inductance matrix simulation with significant less computing time and memory usage, compared to other proposed methods, such as the shift-truncate method.
A charge based capacitance measurement (CBCM) method is generalized to a multi-conductor system. The test structure and approach is applicable for characterizing multi-interconnect configurations representative of des...
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ISBN:
(纸本)0780365119
A charge based capacitance measurement (CBCM) method is generalized to a multi-conductor system. The test structure and approach is applicable for characterizing multi-interconnect configurations representative of design applications, providing a powerful tool for experimental characterization.
High speed and high precision linear motions are found in many industrial applications, such as the wire-bonding and die-bonding of microelectronic components. In order to achieve the tight requirements of future-gene...
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ISBN:
(纸本)0780366182
High speed and high precision linear motions are found in many industrial applications, such as the wire-bonding and die-bonding of microelectronic components. In order to achieve the tight requirements of future-generation semiconductor packaging machines, a high-performance linear drive system is developed. The linear drive system consists of linear permanent magnet synchronous motors (LPMSM) and a DSP-based fully digital PWM drive. To achieve high trajectory accuracy, a dual-rate multi-loop cascade control structure with velocity and acceleration feed-forward is employed. Also, a velocity observer is used to provide reliable and ripple free feedback information. To increase the current dynamics, overrated momentary high-voltage and high-current are injected to the actuator's coils, through the PWM drive. Finally, to reduce mechanical resonance during the high-speed start-stop operations, a third-order profile generator is developed and employed in the motion path generation process. This paper describes the development of such a linear drive system. The paper includes: (i) the construction and modeling of the permanent magnet synchronous linear drive; (ii) the simulation of the linear drive and the control system; (iii) the design and hardware implementation of the linear drive system; and (iv) the implementation result. The final result shows that the system is capable of 15 G acceleration and 1 micron position accuracy.
This Volume 4228 of the conference proceedings contains 45 papers. Topics discussed include computer aided design for microelectronics and microelectromechanical devices, advanced design method, high level synthesis a...
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This Volume 4228 of the conference proceedings contains 45 papers. Topics discussed include computer aided design for microelectronics and microelectromechanical devices, advanced design method, high level synthesis and testing, device modeling, analog circuits design and synthesis, new circuits and systems.
New transparent memory test algorithms for semiconductor memory are presented in the paper along with the modified memory testing simulation package MAP. The test algorithms allow detecting memory read errors - the er...
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ISBN:
(纸本)0819439002
New transparent memory test algorithms for semiconductor memory are presented in the paper along with the modified memory testing simulation package MAP. The test algorithms allow detecting memory read errors - the error type that was not covered in the previous research.
This paper is dealing with design, simulation and test of microsystems (microelectromechanical systems, MEMS). Both existing tools and open research areas are addressed. All through the paper, similarities between the...
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ISBN:
(纸本)0819439002
This paper is dealing with design, simulation and test of microsystems (microelectromechanical systems, MEMS). Both existing tools and open research areas are addressed. All through the paper, similarities between the present development of MEMS and the development of microelectronics decades ago are pointed out, including the migration from point tools to Computer-Aided design (CAD) frameworks, testing, foundries/fabless business or Intellectual Property (IP) issues. Specific aspects such as thermal simulation of microstructures and thermomechanical design at the package level. The conclusion is depicting a possible global simulation scheme integrating the needs of Systems on Chip (SoCs) multilanguage simulation together with the needs of MEMS multipurpose simulation.
RF noise in short channel MOSFETs is discussed from the point of view of diffusion and drift current components. It is demonstrated that the access noise is due to a growing contribution of the diffusion current in a ...
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ISBN:
(纸本)0819439002
RF noise in short channel MOSFETs is discussed from the point of view of diffusion and drift current components. It is demonstrated that the access noise is due to a growing contribution of the diffusion current in a short channel devices.
A simple, yet accurate method of modeling the spiral inductor up to six times its first self-resonant frequency is presented. The proposed model, which is derived from the measured data with lumped elements, overcomes...
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ISBN:
(纸本)0819439002
A simple, yet accurate method of modeling the spiral inductor up to six times its first self-resonant frequency is presented. The proposed model, which is derived from the measured data with lumped elements, overcomes the limitation in the valid frequency range of the commonly adopted PI-model and the difficulty in the extraction of element values of broadband model consisting of a number of PI-model cascaded together. Its element values are extracted via systematic data fitting, with two element values to be varied at a time. Such systematic approach offers easy extension of its validity to a higher frequency without complicating the extraction methodology.
This paper presents the modeling of an optical link based on VCSELs (a promising generation of optical sources which appear well suited to photodetection). A physics-based model of a VCSEL has been established and val...
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ISBN:
(纸本)0819439002
This paper presents the modeling of an optical link based on VCSELs (a promising generation of optical sources which appear well suited to photodetection). A physics-based model of a VCSEL has been established and validated. The complete optical link has been modeled including free space propagation, gaussian spatial repartition of light and photodetection. Concerning the photodetection, a low-noise, low-voltage, 2.5Gb/s CMOS photoreceiver is being designed, so as to complete the optical link. Furthermore, system parameters such as BER. (Bit Error Rate which call be extracted from the noise estimation) or power consumption can be determined. This results in a fully self-consistent model of a short distance optical interconnection that can be used to simulate board to board or chip to chip interconnections.
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