The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This study proposes an innovative method to measure the variation of cell leakage current. Extreme cell leakage determines DRAM refresh time (tREF). Although the average leakage current from the test element group (TEG) has been the only index for determining cell leakage, it does not provide the distribution of unit cell leakage. We find that cell leakage distribution can be calculated from the slope...
An analysis on the degradation of DRAM performance caused by the NBTI degradation of p-MOSFET is first to be reported. To improve the NBTI immunity, three candidates are examined. First, minimizing Si-H bonds at Si/SiON interface through controlling the heat-budget at BEOL shows a promising result in NBTI lifetime, but it is not appropriate for DRAM process since it decreases the refresh time. Next,...
The Belle II experiment will start physics data taking in 2016 at the SuperKEKB factory to search for new physics beyond the Standard Model from flavor physics channels. A network distributed data acquisition (DAQ) system was developed for huge data size from the Belle II detector. In order to manage the distributed systems, software control and monitoring systems for the DAQ subsystems were newly...
In the data acquisition (DAQ) system of the Belle II experiment, COmmon Pipeline Platforms for Electronics Readout (COPPER) boards developed at KEK are to be used for the unified interface with front-end detectors, except for an innermost pixel detector which needs a dedicated data reduction system. A COPPER board receives and processes the data from the front-end electronics via common optical links...
The Belle II experiment, a new generation B-factory experiment at KEK aiming to search for new physics beyond the standard model, is scheduled to start in 2016. The maximum trigger rate is expected to reach as high as 30 kHz with the raw event size of more than 1MB, and the data acquisition is a big challenge. The Belle II DAQ system is a synchronous system based on a pipelined trigger flow control...
In this study we have measured and analyzed characteristics of real transistors on dynamic random access memories (DRAM) including cell transistor by using nano-probing system for improved failure analysis. Measuring results of the conventional pad probing and nano-probing were compared on test element group (TEG) patterns of large transistors. The transistor characteristics of nano-probing results...
The online system of the underground neutrino detector, Super-Kamiokande is scheduled to be upgraded in September of 2008 together with the front-end electronics and the data-acquisition will be started in October. The detector contains 50000 tons of pure water equipped with about 13000 photo-multipliers (PMTs) to detect Cherenkov light. In the new data acquisition scheme, we will not use the hardware...
Gate induced drain leakage (GIDL) characteristics were investigated with the recessed channel array transistor (RCAT) for DRAM, using the elevated source drain (ESD). The lower doping concentration of a source-drain region in the ESD structure reduces the electric field, which reduces drain leakage current and also the fluctuation of leakage current. These reductions can enhance the data retention...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.