Publicaties
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A novel DRAM architecture as a low leakage alternative for SRAM caches in a 3D interconnect context KU Leuven
This paper presents a DRAM architecture that improves the DRAM performance/power trade-off to increase their usability on low power chip design using 3D interconnect technology. The use of a finer matrix subdivision and buffering the bitline signal at the localblock level allows to reduce both the energy per access and the access time. The obtained performances match those of a typical low power SRAM, while achieving a significant area and ...
Feasibility analysis of embedded MRAM solutions at advanced process nodes Interuniversitair Micro-Electronica Centrum vzw
While many MRAM solutions have been proposed as alternatives to conventional memory solutions (like SRAM, eDRAM and NOR-FLASH) for the embedded domain, envisioning MRAM based drop-in replacements without architectural modifications requires an extensive design technology co-optimization (DTCO) loop to arrive at the FEOL, MEOL, BEOL and stack requirements keeping in mind Power, Performance, Area and Cost considerations. This paper analysis the ...
The Giant VCMA Effect for Novel MRAM Applications KU Leuven
This project aims to make possible the next generation of magnetic memory (MRAM) replacing the present Spin-Transfer Torque (STT) current controlled STT MRAM by a low power, nonvolatile voltage controlled MRAM. With voltage controlled MRAM, we aspire to reduce future chip power consumption, important for the future of nanoelectronics. Apart from reducing computing's energy footprint, increasing energy efficiency is also crucial to realise the ...
High Speed MRAM with Voltage Control of Magnetic Anisotropy (VCMA) Effect KU Leuven
Magnetic random access memory (MRAM) is gaining intensive interest for embedded and stand-alone memory applications. Its inherent non-volatility is believed to address the large stand-by energy consumption issues in the present memory hierarchy. In recent years, the spin-transfer torque (STT)-MRAM has gradually matured and started to appear in the market. Typically, STT writing of perpendicular magnetic tunnel junction (pMTJ) is limited to a few ...
Distributions of easy axes and reversal processes in patterned MRAM arrays Interuniversitair Micro-Electronica Centrum vzw
The distribution of the easy-axes in an array of MRAM cells is a vital parameter to understand the switching and characteristics of the devices. By measuring the coercivity as a function of applied-field angle, and remaining close to the perpendicular orientation, a classic Stoner-Wohlfarth approximation has been applied to the resulting variation to determine the standard deviation, sigma, of a Gaussian distribution of the orientation of the ...
Spin-orbit torque MRAM for ultrafast cache and neuromorphic computing applications Interuniversitair Micro-Electronica Centrum vzw
Spin-orbit torque (SOT) magnetic random-access memory (MRAM) is a 3-terminal non-volatile memory technology promising high speed up to multi-GHz, high endurance and non-volatility. Here we show how SOT-MRAM stack can be optimized to reach performance towards an embedded last level cache memory replacing SRAM. Moreover, we show how the stack and device geometry can be optimized to increase density and how the stack properties can be optimized to ...
Out-of-plane focusing grating couplers for silicon photonics integration with optical MRAM technology Universiteit Gent
We present the design methodology and experimental characterization of compact out-of-plane focusing grating couplers for integration with magnetoresistive random access memory technology. Focusing grating couplers have recently found attention as layer-couplers for photonic-electronic integration. The components we demonstrate are designed for a wavelength of 1550 nm, fabricated in a standard 220 nm SOI photonic platform and optimized given the ...
Antibacterial activity of glutathione-coated silver nanoparticles against gram positive and gram negative bacteria Universiteit Antwerpen
In the present paper, we study the mechanism of antibacterial activity of glutathione (GSH) coated silver nanoparticles (Ag NPs) on model Gram negative and Gram positive bacterial strains. Interference in bacterial cell replication is observed for both cellular strains when exposed to GSH stabilized colloidal silver in solution, and microbicidal activity was studied when GSH coated Ag NPs are (i) dispersed in colloidal suspensions or (ii) ...