Abstract:
A multi-layer dielectric layer structure for a semiconductor device. The multi-layer dielectric layer structure comprises a silicate interface layer having a dielectric constant greater than that of silicon nitride and a high-k dielectric layer overlying the silicate interface layer. The high-k dielectric layer comprises one or more ordered pairs of first and second layers. With the present invention, the dielectric constant of the high-k dielectric layer can be optimized while improving interface characteristics. With a higher crystallization temperature realized by forming the multi-layer structure, each of whose layers is not more than the critical thickness, leakage current can be reduced, thereby improving device performance.
Abstract:
Methods of erasing a non-volatile memory device having discrete charge trap sites between a semiconductor substrate and a gate include applying a negative voltage to a gate at least partially spaced apart from a semiconductor substrate by a charge storage layer providing discrete charge trap sites. A first positive voltage is applied to a source formed in the semiconductor substrate adjacent to one sidewall of the gate. A second positive voltage, which is equal to or less than the first positive voltage, is applied to a drain formed in the semiconductor substrate adjacent to the gate and located opposite the source.
Abstract:
A local SONOS structure having a two-piece gate and a self-aligned ONO structure includes: a substrate; an ONO structure on the substrate; a first gate layer on and aligned with the ONO structure; a gate insulator on the substrate aside the ONO structure; and a second gate layer on the first gate layer and on the gate insulator. The first and second gate layers are electrically connected together. Together, the ONO structure and first and second gate layers define at least a 1-bit local SONOS structure. A corresponding method of manufacture includes: providing a substrate; forming an ONO structure on the substrate; forming a first gate layer on and aligned with the ONO structure; forming a gate insulator on the substrate aside the ONO structure; forming a second gate layer on the first gate layer and on the gate insulator; and electrically connecting the first and second gate layers.
Abstract:
Byte-operational nonvolatile semiconductor memory devices are capable of erasing stored data one byte at a time. A byte memory cell may include a memory cell array of 1-byte memory transistors. The 1-byte memory transistors may be arranged in one direction, each including a junction region and a channel region formed in an active region. A byte memory cell may include a byte select transistor. The select transistor may be disposed in the active region and including a junction region that is directly adjacent to a junction of each of the 1-byte memory transistors. The byte select transistor may be disposed over or under the 1-byte memory transistors perpendicular to the arranged direction of the 1-byte memory transistors.
Abstract:
A semiconductor device comprises a silicate interface layer and a high-k dielectric layer overlying the silicate interface layer. The high-k dielectric layer comprises metal alloy oxides.
Abstract:
A semiconductor device adopting an interlayer contact structure between upper and lower conductive layers and a method of manufacturing the semiconductor device adopting the structure are provided. The lower conductive layer includes a first conductive layer and a first silicide layer stacked together. The upper conductive layer includes a second conductive layer doped with impurities and a second silicide layer stacked together. In the interlayer contact structure, the first and second conductive layers are in direct contact with each other. This decreases the contact resistance between the two conductive layers and improves the electrical properties of the device.
Abstract:
A method of fabricating a trench isolation structure in a high-density semiconductor device that provides an isolation characteristic that is independent of the properties of adjacent MOS transistor devices, wherein a first trench in a first isolation area and a second trench implanted are formed on a semiconductor substrate, a nitrogen (N)-rich silicon layer is formed on the sidewall in a second isolation area, a subsequent oxidation process may be employed to fabricate oxide layers, each having a different thickness, on the sidewall surfaces of the first and second trenches. When the first and second oxide-layered trenches are filled with a stress relief liner and a dielectric material, the different thicknesses of the oxides prevent leakage currents from flowing to an adjacent semiconductor device, regardless of the doping properties of each device.
Abstract:
The present invention provides a highly reliable polycrystal silicon thin film transistor with N2O plasma oxide having an excellent leakage current characteristics comparable to the thermal oxide film formed on the crystalline silicon. Also, the present invention provides a method of fabricating EEPROM or flash memory using N2O plasma oxide as a tunnel oxide, and N2O plasma oxide film as an interpoly dielectric between the floating gate and the control gate.