Shoaib Zaidi

Shoaib Zaidi

About

19
Publications
1,060
Reads
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589
Citations
Additional affiliations
April 2009 - October 2013
NED University of Engineering and Technology, Karachi
Position
  • Professor (Full)
January 1997 - July 1997
August 1990 - May 1992
University of Texas at Dallas
Position
  • Research Associate (Graduate Student)

Publications

Publications (19)
Conference Paper
Energy crises, identified as a global challenge, need to be addressed immediately and are a part of the curriculum, and the focus of the agenda in a newly designed renewable energy course offered to all freshmen at Habib University, Pakistan. Being a stakeholder, energy education shouldn't be limited to those who choose to study the relevant subjec...
Conference Paper
In space environments, electronic devices suffer from radiation effects, producing bit flips and upsets. Even a single upset can disrupt the operation and the fidelity of data. Many of the problems encountered in space operations of electronics are overcome by radiation hardening. We present a software based approach as an alternative to the previo...
Conference Paper
A method is proposed for effective laboratory teaching which targets engineering universities most common problems they encounter. An experiment was performed which yields student academic growth depends majorly on effectiveness of instructor. The observed result proves the steps which are proposed, if followed will provide prominent effect on stud...
Conference Paper
In this paper, a detailed study on the etching characteristics of nitrogen doped Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub> (N:GST) thin films is performed to elucidate the relationship between pattern fidelity and material modification. Multiple methodologies ranging from physical sputtering to chemically driven reactive etching are shown to succe...
Conference Paper
We discuss novel multi-level write algorithms for phase change memory which produce highly optimized resistance distributions in a minimum number of program cycles. Using a novel integration scheme, a test array at 4 bits/cell and a 32 kb memory page at 2 bits/cell are experimentally demonstrated.
Conference Paper
We have successfully demonstrated a novel "pore" phase change memory cell, whose critical dimension (CD) is independent of lithography. Instead, the pore diameter is accurately defined by intentionally creating a "keyhole" with conformal deposition. Fully integrated 256 kbit test chips have been fabricated in 180nm CMOS technology. We report SET ti...
Conference Paper
Full-text available
An ultra-thin phase-change bridge (PCB) memory cell, implemented with doped GeSb, is shown with < 100muA RESET current. The device concept provides for simplified scaling to small cross-sectional area (60nm<sup>2</sup>) through ultra-thin (3nm) films; the doped GeSb phase-change material offers the potential for both fast crystallization and good d...
Patent
A memory cell device that includes a plurality of phase-change memory cells, at least one write pulse generator, and at least one temperature sensor. The plurality of phase-change memory cells are each capable of defining at least two states. The write pulse generator generates a write pulse for the plurality of phase-change memory cells. The tempe...
Patent
A method and mask to improve measurement of alignment marks is disclosed. An exemplary embodiment of the invention includes a resist mask with a patterned alignment mark comprising an assemblage of features whose spacing is smaller than the wavelength of light used to measure the alignment. In a preferred embodiment, an alignment mark patterning pr...
Conference Paper
A novel Pillar phase change memory based on fully integrated test arrays in 180nm CMOS technology has been successfully fabricated. A current-confining Pillar structure leads to a self-heating at the center of the chalcogenide layer, and needs only one additional mask level for its fabrication. Switching characteristics with write currents less tha...
Article
A method that uses Fourier Transform Infrared (FTIR) Reflectance spectroscopy to determine the depths of poly silicon filled trenches is described. These trenches, which form the cells for trench DRAM, are arranged in arrays that are periodic in both directions. The method is non-contact and non-destructive. Large number of points per wafer can be...
Article
The gathering, processing, communication and application of large amounts of information, which define today the 'information age', have been made possible through the widespread use of computers. This prevalence is due to the availability of increased processing speeds at lower costs which are results of miniaturization and consolidation of electr...
Article
The silylation step in the top surface imaging process has been difficult to monitor and characterize for lack of appropriate metrology tools. Utilizing scatterometry to measure silylated wafers, we report successful monitoring of processing effects. Wafers were manufactured under nominally identical processing conditions. Applying scatterometry, w...
Article
We have initiated an effort to develop metrology tools that isolate the effect of each process step. Light scattered from diffracting structures is analyzed to determine characteristics of the structure. The technique is rapid, non-destructive, and extremely sensitive to variations in the samples that were examined. Through our technical collaborat...
Article
A Fox and Li analysis [Bell Syst. Tech J. 40, 453 (1961); Proc. IEEE 51, 80 (1963); IEEE J. Quantum Electron QE-4, 460 (1968)] for a laser resonator with a radially varying gain yields a picture of the mode evolution dynamics and a steady-state mode distribution which are different from the constant-gain case. When an axially maximal gain is sharpl...
Article
In this paper we study the problem of mode formation in a laser with a radial gain dependence using the classic approach of Fox and Li. This computationally intensive technique offers several advantages. Using this approach reasonable steady state mode distributions with definite stability may be calculated precisely. Further, details of the transi...
Article
We present a modifed Fox-Li analysis for the evolution of the mode in a dielectric sphere. When Fresnel apodization is included, the final field distributions resemble those calculated by the more traditional, steady-state Mie-Debye theory. For microdroplets of the size typically studied in linear and nonlinear scattering experiments, we find that...
Article
Thesis (M.S.)--University of Texas at Dallas, 1992. Includes vita. Includes bibliographical references (leaves 70-78).

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