摘要:
A semiconductor memory device for reducing parasitic bit line capacitance and a method of fabricating the same are provided. The semiconductor memory device includes a conductive pad formed on a semiconductor substrate and a first interlayer insulating layer having a first contact hole that exposes the conductive pad. The first interlayer insulating layer is formed on the conductive pad and the semiconductor substrate. Bit line stacks are formed on the first interlayer insulating layer. Bit line spacers are formed from a combination of materials having different dielectric constants on the sidewalls of the bit line stack to reduce the parasitic bit line capacitance. Preferably, the bit line spacers are stack layers including silicon nitride, silicon oxide, and silicon nitride. A second interlayer insulating layer having a second contact hole is formed on the bit line stack. A conductive plug fills the first and second contact holes. A storage electrode of a capacitor is formed on the conductive plug to be connected to the conductive pad.
摘要:
A method of manufacturing a semiconductor device by which a generation of a void is prevented after depositing an interlayer dielectric material. First, a plurality of conductive patterns are formed on a substrate and then, a capping insulation layer is formed on the conductive patterns. The capping insulation layer is treated with plasma, and an interlayer dielectric material is deposited on the plasma treated capping insulation layer. The dependency of the interlayer dielectric on the type of material and form of an underlying layer is reduced to improve a gap-filling characteristic, especially for a gap having a high aspect ratio. An improved gap-filling characteristic is accomplished and the formation of all or substantially all of the voids from forming in a gap is prevented even though an interlayer dielectric is deposited under a conventional deposition conditions.
摘要:
In a method of manufacturing a phase-changeable memory device, a lower electrode is formed on a substrate. Silicon oxynitride is then deposited on the lower electrode at a temperature of about 450° C. to about 650° C. to form an insulating interlayer that is relatively dense on the lower electrode. The insulating interlayer is partially etched to form a contact hole exposing the lower electrode. A phase-changeable material layer pattern filling up the contact hole is formed on the insulating interlayer such that the phase-changeable material layer pattern makes contact with the lower electrode.
摘要:
A method of fabricating a transistor with a recessed channel is provided. The method includes forming trenches for a recessed channel on a semiconductor substrate, depositing an isolation layer on the semiconductor substrate on which the trenches are formed, depositing a gate dielectric layer on the semiconductor substrate so that the gate dielectric layer can be extended to bottoms and sidewalls of the trenches, forming gates to fill the trenches, and forming source and drain regions in the semiconductor substrate adjacent to the gates.
摘要:
In one embodiment, to fabricate a semiconductor device, a first insulation interlayer is formed on a substrate. A contact pad is formed through the first insulation interlayer. An etch stop layer and a second insulation interlayer are sequentially formed on the first insulation interlayer and the pad. A contact hole exposing at least a portion of the contact pad is formed by partially etching the second insulation interlayer and the etch stop layer. A preliminary lower electrode is formed in the hole. The preliminary lower electrode is isotropically etched to form a lower electrode contacting the contact pad. A dielectric layer and an upper electrode are sequentially formed on the lower electrode.
摘要:
A method of fabricating a transistor with a recessed channel is provided. The method includes forming trenches for a recessed channel on a semiconductor substrate, depositing an isolation layer on the semiconductor substrate on which the trenches are formed, depositing a gate dielectric layer on the semiconductor substrate so that the gate dielectric layer can be extended to bottoms and sidewalls of the trenches, forming gates to fill the trenches, and forming source and drain regions in the semiconductor substrate adjacent to the gates.
摘要:
A stacked semiconductor device includes a first gate structure formed on a substrate, a first insulating interlayer covering the first gate structure on the substrate, a first active pattern formed through and on the first insulating interlayer and contacting the substrate, a second gate structure formed on the first active pattern and the first insulating interlayer, a buffer layer covering the second gate structure on the first active pattern and the first insulating interlayer, a second insulating interlayer formed on the buffer layer, and a contact plug formed through the first and second insulating interlayers, which contacts with the substrate and is insulated from the second gate structure by the buffer layer. Operation failures of a transistor in the stacked semiconductor device can be reduced because the buffer layer prevents a word line from being electrically connected to the contact plug.
摘要:
In a layer structure, a method of forming the layer structure, a method of manufacturing a capacitor having the layer structure and a method of manufacturing a semiconductor device having the capacitor, a structure may be formed on a substrate. A first insulation layer including at least one kind of impurities may be formed on the structure. A flatness of the first insulation layer may fluctuate according to the type and concentration of the impurities. The first insulation layer may include silicate glass doped with first impurities including an element in Group III and/or second impurities including an element in Group V. The flatness of the first insulation layer may improve in proportion to the concentration of the first impurities whereas in inverse proportion to the concentration of the second impurities. Accordingly, the flatness of the first insulation layer may be determined by adjusting the type and concentration of the impurities.
摘要:
Methods of forming trench isolations are provided. A method includes providing a semiconductor substrate having a cell array region and a peripheral region. At least one cell trench in the cell array region and at least one peripheral trench wider than the cell trench in the peripheral region of the substrate are formed. The cell and the peripheral trenches have sidewalls. A first dielectric layer that partially fills the cell and peripheral trenches is formed over the substrate. At least one photoresist pattern that exposes at least the cell trench partially filled with the first dielectric layer is formed over the substrate. The first dielectric layer formed on the sidewalls of the exposed cell trench is etched by using the photoresist pattern as a etch mask. Subsequently, the photoresist pattern is removed. A second dielectric layer filling the cell and peripheral trenches is formed over the substrate where the photoresist pattern is removed.
摘要:
A method of forming a silicon nitride layer in a semiconductor device manufacturing process. The silicon nitride layer (SixNyHz) is formed by PE-CVD technique at low temperature to have at most 0.35 hydrogen composition. The resulting silicon nitride layer has substantially no Si—H bonding as compared with a silicon nitride layer formed at high temperature, thereby reducing thermal stress variation during annealing. The resulting silicon nitride layer exhibits reduced thermal stress variation before and after deposition, preventing a popping phenomenon and reducing the stress applied to the underlying layer.