Abstract:
A semiconductor device includes a device isolation layer on a semiconductor substrate defining an active region in the semiconductor substrate, a low voltage well of a first conductivity type in the active region of the semiconductor substrate, a high voltage impurity region of a second conductivity type in the active region of the semiconductor substrate, the high voltage impurity region positioned in an upper portion of the low voltage well, a high concentration impurity region of the second conductivity type within the high voltage impurity region and spaced apart from the device isolation layer, and a floating impurity region of the first conductivity type between the device isolation layer and the high concentration impurity region, the floating impurity region being a portion of an upper surface of the active region.
Abstract:
Provided are an EEPROM cell, an EEPROM device, and methods of manufacturing the EEPROM cell and the EEPROM device. The EEPROM cell is formed on a substrate including a first region and a second region. A first EEPROM device having a first select transistor and a first memory transistor is disposed in the first region, while a second EEPROM device having a second select transistor and a second memory transistor is disposed in the second region. In the first region, a first drain region and a second floating region are formed apart from each other. In the second region, a second drain region and a second floating region are formed apart from each other. A first impurity region, a second impurity region, and a third impurity region are disposed in a common source region between the first and second regions of the substrate. The first and third impurity regions form a DDD structure, and the first and second impurity region form an LDD structure. That is, the first impurity region completely surrounds the second and third impurity regions in horizontal and vertical directions, the second impurity region surrounds the third impurity region in a horizontal direction, and the junction depth of the third impurity is greater than that of the second impurity region.
Abstract:
A semiconductor device includes a device isolation layer on a semiconductor substrate defining an active region in the semiconductor substrate, a low voltage well of a first conductivity type in the active region of the semiconductor substrate, a high voltage impurity region of a second conductivity type in the active region of the semiconductor substrate, the high voltage impurity region positioned in an upper portion of the low voltage well, a high concentration impurity region of the second conductivity type within the high voltage impurity region and spaced apart from the device isolation layer, and a floating impurity region of the first conductivity type between the device isolation layer and the high concentration impurity region, the floating impurity region being a portion of an upper surface of the active region.
Abstract:
In an apparatus and method for protecting resources of a computing system from a malicious code by selective virtualization, at least a part of the resources is classified as compulsory resources for executing a program on the computing system. When a vulnerable program executed in a separate space attempts to access one of the compulsory resources, an operating system level virtualization is performed. Further, when the vulnerable program attempts to access one of the resources of the computing system which is other than the compulsory resources, the vulnerable program is permitted to access a modified resource which is generated by modifying content of the resource.
Abstract:
A system for logically separating a server using client virtualization includes a client terminal including a virtual environment generation unit for generating a virtual environment, and a virtualized server including a local storage unit, an authentication server for performing authentication on the client terminal when a request for access to the local storage unit is received from a process executed in the virtual environment, and a virtualization filter drier for allowing or blocking the access request to the local storage unit based on the authentication result of the client terminal. The client terminal further includes a virtualization filter drives for transmitting the access request from the process executed in the virtual environment to the local storage unit, and blocking the access request from the process without being made through the virtual environment to the local storage unit.
Abstract:
Provided are an EEPROM cell, an EEPROM device, and methods of manufacturing the EEPROM cell and the EEPROM device. The EEPROM cell is formed on a substrate including a first region and a second region. A first EEPROM device having a first select transistor and a first memory transistor is disposed in the first region, while a second EEPROM device having a second select transistor and a second memory transistor is disposed in the second region. In the first region, a first drain region and a second floating region are formed apart from each other. In the second region, a second drain region and a second floating region are formed apart from each other. A first impurity region, a second impurity region, and a third impurity region are disposed in a common source region between the first and second regions of the substrate. The first and third impurity regions form a DDD structure, and the first and second impurity region form an LDD structure. That is, the first impurity region completely surrounds the second and third impurity regions in horizontal and vertical directions, the second impurity region surrounds the third impurity region in a horizontal direction, and the junction depth of the third impurity is greater than that of the second impurity region.
Abstract:
A method of forming a tunneling insulating layer having a size smaller than the size obtained by the resolution of a photolithography process is provided. The method includes the steps of forming a first insulating layer and a second insulating layer on a substrate, forming a re-flowable material layer pattern to re-flow the re-flowable material layer pattern, removing the second insulating layer and the first insulating layer to expose the substrate, and forming a tunneling insulating layer.
Abstract:
In a nonvolatile semiconductor memory device, and a method of fabricating the same, the nonvolatile semiconductor memory device includes a cell doping region and source/drain regions in a semiconductor substrate, the cell doping region being doped as a first conductive type, a channel region disposed between the source/drain regions in the semiconductor substrate, a tunnel doping region of the first conductive type formed in a predetermined region of an upper portion of the cell doping region, the tunnel doping region being doped in a higher concentration than that of the cell doping region, a tunnel insulating layer formed on a surface of the semiconductor substrate on the tunnel doping region, a gate insulating layer surrounding the tunnel insulating layer and covering the channel region and the cell doping region exposed beyond the tunnel doping region, and a gate electrode covering the tunnel insulating layer and on the gate insulating layer.
Abstract:
A method for preparation of a biaxially stretched polyester film with good slip and release properties comprising coating an acrylic resin-based aqueous resin compound, which is derived from adding an amino-modified silicone compound having the structural formula (1), a waxy additive and inert inorganic particles to an acrylic resin, on at least one surface of a mono-axially stretched polyester film, drying the polyester film coated with the aqueous resin compound, mono-axially stretching the dried polyester film in a direction perpendicular to that of the previous mono-axial stretching and heat-treating the stretched polyester film: ##STR1## wherein R' is a hydroxyl group, a methyl or an ethyl; R" is a hydrogen carbide which has 0 to 10 carbon atoms and to which NH or NH.sub.2 is bonded; m is an integer in the range of 5 to 1,000; n is an integer in the range of 100 to 20,000; and n/(m+n)=0.5.