Nearly isotropic etching of the 6H-SiC carbon face has been achieved in a remote plasma at 330-degrees-C using a mixture of O2 and NF3 in argon. Using evaporated aluminum as a mask, undercutting has been observed to a...
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Nearly isotropic etching of the 6H-SiC carbon face has been achieved in a remote plasma at 330-degrees-C using a mixture of O2 and NF3 in argon. Using evaporated aluminum as a mask, undercutting has been observed to a distance equal to the etch depth. The etch rate is a function of the ratio Of O2 to NF3 flow rates and of temperature, peaking strongly to 220 nm/min at 82% oxygen for 330-degrees-C. Smooth surfaces were obtained for gas ratios leading to the maximum etch rate, and also for a NF3-argon mixture, with significant roughening observed for other O2-NF3-argon mixtures. In the absence of a practical wet etch for SiC, this procedure is promising for isotropic etching in SiC device processing.
To achieve real-time performance in signalprocessing applications that require the estimation of Higher Order Statistics, it is necessary to introduce parallel processing and pipelining. We present here a two stages ...
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To achieve real-time performance in estimating the higher order statistics directly from the incoming time-series data, it is necessary to (a) design faster algorithms by reducing any inherent computational redundancy...
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A technique that greatly simplifies the computational complexity of digital cyclic spectral analysis algorithms is presented. The technique, which is based on Bussgang's theorem, replaces complex multiplications i...
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A technique that greatly simplifies the computational complexity of digital cyclic spectral analysis algorithms is presented. The technique, which is based on Bussgang's theorem, replaces complex multiplications in spectral correlation operations with simple sign-change and data-multiplexing operations. Moreover, the technique is applicable to both time- and frequency-averaging algorithms. A simulation study that compares the computed results obtained using the new technique with results from standard time- and frequency-averaging algorithms shows that the new technique is very promising, particularly for frequency-averaging algorithms.
A multivariable optimization problem is set to design 2-band PR-QMFs. The energy compaction, aliasing energy, unit step response, zero-mean high-pass filter, uncorrelated subband signals, constrained nonlinearity of t...
Investigates the application of 2D IIR digital filters for deinterlacing of video signals. A special class of diamond filters is presented, which employs only two coefficients and has approximately zero-phase response...
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In this paper,we investigate the design and application of multidimensional IIR digital filters for video signal *** of sampling structure conversion and deinterlacing are addressed.A multistage filter structure is th...
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In this paper,we investigate the design and application of multidimensional IIR digital filters for video signal *** of sampling structure conversion and deinterlacing are addressed.A multistage filter structure is then proposed to perform the general conversions among different types of sampling structures. A class of IIR digital filters is designed particularly for the above *** simulation results are also given.
A new direct contrast enhancement algorithm is proposed. It can be used to enhance the contrast of an image without increasing the dynamic range of the pixel values. A distinctive property of the proposed method is th...
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A new direct contrast enhancement algorithm is proposed. It can be used to enhance the contrast of an image without increasing the dynamic range of the pixel values. A distinctive property of the proposed method is that it yields results matching the characteristic of the human visual system. The histogram of the enhanced image has almost the same shape as that of the original image.< >
Studies, via simulation, the performance of different bus allocation policies for a generic shared-medium ATM switch with input and output queueing. The policies differ in the amount of information used by the bus arb...
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