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Fabrication of 100 nm pMOSFETS With Hybrid AFW / STM lithography
(IEEE, 1997-06)
Scanning probe lithography (SPL) is an emerging area of research in which the scanning tunneling microscope
(STM) or atomic force microscope (AFM) is used to pattern nanometer-scale features. Four factors will dictate ...
A new detection method for capacitive micromachine ultrasonic transducers
(IEEE, 2001)
Capacitive micromachine ultrasonic transducers (cMUT) have become an alternative to piezoelectric transducers in the past few years. They consist of many small circular membranes that are connected in parallel. In this ...
Lens geometries for quantitative acoustic microscopy
(Springer, 1995)
The purpose of the first Lemons-Quate acoustic microscope(1) was to image the surfaces of materials or biological cells with a high resolution. Unfortunately, competition with the optical microscope was only partially ...
Design and implementation of a general purpose VLSI median filter unit and its applications
(IEEE, 1989)
A VLSI median filter unit has been designed and implemented in 3-μ m M2 CMOS, using full-custom VLSI design techniques. The unit consists of two single-chip median filters, one extensible and one real-time. The chips are ...
Micromachined two-dimensional array piezoelectrically actuated transducers
(A I P Publishing LLC, 1998-03-16)
This letter presents micromachined two-dimensional array flextensional transducers that can be used to generate sound in air or water. Individual array elements consist of a thin piezoelectric ring and a thin, fully ...
Using phase relations in microstrip directional couplers to achieve high directivity
(2013)
We analyze the microstrip directional couplers with a special focus on the phase difference between the coupled and isolated ports. The analysis uses the even-odd mode decomposition technique and network theory. The results ...
Deep-collapse operation of capacitive micromachined ultrasonic transducers
(IEEE, 2011)
Capacitive micromachined ultrasonic transducers (CMUTs) have been introduced as a promising technology for ultrasound imaging and therapeutic ultrasound applications which require high transmitted pressures for increased ...
Calculation of transformer ratio in mason's equivalent circuit for cMUTs
(IEEE, 2006)
We present a new method to calculate the transformer ratio of a cMUT in Mason's Equivalent circuit model. The effect of the spring softening capacitance is also included in the analysis. We use the existing turns ratio ...
Optimization of a collapsed mode CMUT receiver for maximum off-resonance sensitivity
(Institute of Electrical and Electronics Engineers, 2018-07-28)
We propose an airborne collapse capacitive micromachined ultrasonic transducer (CMUT) as a practical viable ultrasound transducer capable of providing a stable performance at the off-resonance frequencies. Traditional ...
Nonlinear modeling of an immersed transmitting capacitive micromachined ultrasonic transducer for harmonic balance analysis
(IEEE, 2010)
Finite element method (FEM) is used for transient dynamic analysis of capacitive micromachined ultrasonic transducers (CMUT) and is particularly useful when the membranes are driven in the nonlinear regime. One major ...