摘要:
An EEPROM includes a device isolation layer for defining a plurality of active regions, a pair of control gates extending across the active regions and a pair of selection gates patterns that extend across the active regions and are interposed between the control gate patterns. A floating gate pattern is formed on intersection regions where the control gate patterns extend across the active regions. A lower gate pattern is formed on intersection regions where the selection gate patterns extend across the active regions. An inter-gate dielectric pattern is disposed between the control gate pattern and the floating gate pattern and a dummy dielectric pattern is disposed between the selection gate pattern and the lower gate pattern. The dummy dielectric pattern is substantially parallel to the selection gate pattern, and self-aligned with one sidewall of the selection gate pattern to overlap a predetermine width of the selection gate pattern.
摘要:
A nonvolatile memory device includes a semiconductor substrate, a device isolation layer, a tunnel insulation layer, a floating gate, a buried floating gate, and a control gate. A trench is in the substrate that defines an active region of the substrate adjacent to the trench. A device isolation layer is on the substrate along the trench. A tunnel insulation layer is on the active region of the substrate. A floating gate is on the tunnel insulation layer opposite to the active region of the substrate. A buried floating gate is on the device isolation layer in the trench. An intergate dielectric layer is on and extends across the floating gate and the buried floating gate. A control gate is on the intergate dielectric layer and extends across the floating gate and the buried floating gate.
摘要:
NAND-type flash memory devices and methods of fabricating the same are provided. The NAND-type flash memory device includes a plurality of isolation layers running parallel with each other, which are formed at predetermined regions of a semiconductor substrate. This device also includes a string selection line pattern, a plurality of word line patterns and a ground selection line pattern which cross over the isolation layers and active regions between the isolation layers. Source regions are formed in the active regions adjacent to the ground selection line patterns and opposite the string selection line pattern. The source regions and the isolation layers between the source regions are covered with a common source line running parallel with the ground selection line pattern.
摘要:
A non-volatile memory device and fabrication method thereof are provided. A floating region is formed on an active region on a substrate. Trenches define the active region. The floating region is made of an ONO layer. A gate electrode is formed on the floating region. A mask is formed on the gate electrode. A thermal oxidation is performed to make a sidewall oxide and a trench oxide on the sidewall of the gate electrode and the trench, respectively. As a result, the widths of the gate electrode and the active region become less than the width of the floating region, thereby forming protrusions at ends of the floating region. Isolation regions are formed in the trenches and include the sidewall oxide and the trench oxide. The isolation regions surround the protrusions. As a result, electric field induced on the sidewall of the floating region is decreased. Moreover, the thermal oxidation cures any damage to the sidewalls of the floating region. Accordingly, leakage current can be substantially suppressed at the boundary region between the isolation region and the floating region.
摘要:
A semiconductor transfer circuit and a structure thereof are provided. The transfer circuit and the structure thereof include a stack gate MOS transistor having first and second gate electrodes that are sequentially stacked and a control MOS transistor connected to the stack gate MOS transistor. A drain of the control MOS transistor is connected to the first gate electrode.