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Barış Bayram

Department of Electrical and Electronics Engineering
Scopus Author ID
Design and characterization of a buckling-resistant perforated MEMS membrane under residual stress
Bozyigit, Mustafa Anil; Sahin, Asaf Behzat; Bayram, Barış (2020-05-01)
Micro Electro Mechanical Systems (MEMS) membranes are utilized as both transmitter and receiver in acoustic and ultrasound applications. Their operating frequency ranges are determined by their resonance frequencies. Thus,...
Digital output ROIC with single slope ADC for cooled infrared applications
Akyurek, Fatih; Bayram, Barış (2017-04-01)
The objective of this research is to develop an ADC stage integrated into ROIC which enables ROIC to have digital output. Digital output method isolates noise caused by outside mediums. At the system level, removal of the ...
Radiation impedance study of a capacitive micromachined ultrasonic transducer by finite element analysis
Bayram, Barış (2015-08-01)
In this study, radiation impedance of a capacitive micromachined ultrasonic transducer composed of square-shaped membranes arranged in m x m configuration (m = 1 - 5) is investigated using finite element analysis (FEA) of ...
Custom integrated circuit design for ultrasonic therapeutic CMUT array
Maadi, Mohammad; Bayram, Barış (Springer Science and Business Media LLC, 2015-04-01)
This paper presents the design of a highly flexible and programmable transmit beam-former ASIC using a high voltage (HV) 0.35 mu m CMOS technology to be flip-chip bonded to a 4 x 4 CMUT array for ultrasound therapeutic app...
Plasma-activated direct bonding of patterned silicon-on-insulator wafers to diamond-coated wafers under vacuum
Can, Uryan Isik; Bayram, Barış (2014-08-01)
Direct wafer bonding requires the surfaces to have low surface roughness (R-a < 0.5 nm) as well as to be free of any particles or contaminants. Meeting these requirements for wafers patterned with lithography and dry etchi...
Diamond-Based Capacitive Micromachined Ultrasonic Transducers in Immersion
Cetin, Ahmet Murat; Bayram, Barış (2013-02-01)
Diamond is a superior membrane material for capacitive micromachined ultrasonic transducers (CMUTs). By using ultrananocrystalline diamond (UNCD) membrane and plasma-activated wafer bonding technology, a single diamond-bas...
Diamond-based capacitive micromachined ultrasonic transducers
Bayram, Barış (2012-02-01)
Capacitive micromachined ultrasonic transducers (CMUTs) employing diamond membranes are demonstrated. The design, finite element modeling, microfabrication, and experimental characterization of diamondbased CMUTs are repor...
Microfabrication of vacuum-sealed cavities with nanocrystalline and ultrananocrystalline diamond membranes and their characteristics
Bayram, Barış; Altinoluk, Hayriye Serra (Elsevier BV, 2011-08-01)
Vacuum-sealed cavities featuring diamond membranes are fabricated using plasma-activated direct bonding technology. A chemical mechanical polished (CMP) silicon dioxide interlayer, deposited on diamond with a high temperat...
Fabrication of SiO2-stacked diamond membranes and their characteristics for microelectromechanical applications
Bayram, Barış (Elsevier BV, 2011-04-01)
Diamond is a promising microelectromechanical systems (MEMS) material due to its high Young's Modulus and very large thermal conductivity. In this work, ultrananocrystalline diamond was stacked between silicon dioxide to f...
Plasma-activated direct bonding of diamond-on-insulator wafers to thermal oxide grown silicon wafers
Bayram, Barış; Akar, Orhan; Akın, Tayfun (2010-11-01)
Diamond-on-insulator (DOI) wafers featuring ultrananocrystalline diamond are studied via atomic force microscopy, profilometer and wafer bow measurements. Plasma-activated direct bonding of DOI wafers to thermal oxide grow...