摘要:
A method of forming a gate structure can be provided by forming a tunnel insulation layer on a substrate and forming a floating gate on the tunnel insulation layer. A dielectric layer pattern can be on the floating gate and a control gate can be formed on the dielectric layer pattern, which can be provided by forming a first conductive layer pattern on the dielectric layer pattern. A metal ohmic layer pattern can be formed on the first conductive layer pattern. A diffusion preventing layer pattern can be formed on the metal ohmic layer pattern. An amorphous layer pattern can be formed on the diffusion preventing layer pattern forming a second conductive layer pattern on the amorphous layer pattern. The floating gate can be further formed by forming an additional first conductive layer pattern on the tunnel insulation layer. An additional metal ohmic layer pattern can be formed on the additional first conductive layer pattern. An additional diffusion preventing layer can be formed pattern on the additional metal ohmic layer pattern. An additional amorphous layer pattern can be formed on the additional diffusion preventing layer pattern and an additional second conductive layer pattern can be formed on the additional amorphous layer pattern.
摘要:
A gate structure can include a polysilicon layer, a metal layer on the polysilicon layer, a metal silicide nitride layer on the metal layer and a silicon nitride mask on the metal silicide nitride layer.
摘要:
A gate structure includes an insulation layer on a substrate, a first conductive layer pattern on the insulation layer, a metal ohmic layer pattern on the first conductive layer pattern, a diffusion preventing layer pattern on the metal ohmic layer pattern, an amorphous layer pattern on the diffusion preventing layer pattern, and a second conductive layer pattern on the amorphous layer pattern. The gate structure may have a low sheet resistance and desired thermal stability.
摘要:
A gate structure can include a polysilicon layer, a metal layer on the polysilicon layer, a metal silicide nitride layer on the metal layer and a silicon nitride mask on the metal silicide nitride layer
摘要:
A gate structure includes an insulation layer on a substrate, a first conductive layer pattern on the insulation layer, a metal ohmic layer pattern on the first conductive layer pattern, a diffusion reduction layer pattern on the metal ohmic layer pattern an amorphous layer pattern on the diffusion reduction layer pattern, and a second conductive layer pattern on the amorphous layer pattern. The gate structure may have a low sheet resistance and desired thermal stability.
摘要:
A gate structure includes an insulation layer on a substrate, a first conductive layer pattern on the insulation layer, a metal ohmic layer pattern on the first conductive layer pattern, a diffusion preventing layer pattern on the metal ohmic layer pattern, an amorphous layer pattern on the diffusion preventing layer pattern, and a second conductive layer pattern on the amorphous layer pattern. The gate structure may have a low sheet resistance and desired thermal stability.
摘要:
A gate of a memory device may include a charge trapping structure having a tunnel oxide layer, a charge storing layer, and a blocking layer on a semiconductor substrate; a conductive pattern on the charge trapping structure, the conductive pattern including metal nitride; an ohmic film on the conductive pattern; and a gate electrode on the ohmic film.
摘要:
Disclosed are a variety of methods for increasing the relative thickness in the peripheral or edge regions of gate dielectric patterns to suppress leakage through these regions. The methods provide alternatives to conventional GPOX processes and provide the improved leakage resistance without incurring the degree of increased gate electrode resistance associated with GPOX processes. Each of the methods includes forming a first opening to expose an active area region, forming an oxidation control region on the exposed portion and then forming a second opening whereby a peripheral region free of the oxidation control region is exposed for formation of a gate dielectric layer. The resulting gate dielectric layers are characterized by a thinner central region surrounded or bounded by a thicker peripheral region.
摘要:
A semiconductor memory device, e.g., a charge trapping type non-volatile memory device, may include a charge trapping structure formed in a first area of a substrate and a gate structure formed in a second area of the substrate. The charge trapping structure may include a tunnel oxide layer pattern, a charge trapping layer pattern and a dielectric layer pattern of aluminum-containing tertiary metal oxide. The gate structure may include a gate oxide layer pattern, a polysilicon layer pattern and an ohmic layer pattern of aluminum-containing tertiary metal silicide. A first electrode and a second electrode may be formed on the charge trapping structure. A lower electrode and an upper electrode may be provided on the gate structure. The dielectric layer pattern may have a higher dielectric constant, and the ohmic layer pattern may have improved thermal stability, thereby enhancing programming and erasing operations of the charge trapping type non-volatile memory device.
摘要:
A method of forming a memory device includes forming a first insulating pattern and a polysilicon pattern in a peripheral region of a substrate, forming a cell gate insulating pattern including a second insulating pattern, a charge storage pattern, and a third insulating pattern in a cell region of the substrate, forming a barrier metal layer on the polysilicon pattern and on the third insulating pattern, forming a conductive layer on the barrier metal layer, patterning the conductive layer to simultaneously form a first conductive pattern on the polysilicon pattern and a second conductive pattern on the third insulating pattern, and patterning the barrier metal layer to simultaneously form a first barrier metal pattern on the polysilicon pattern and a second barrier metal pattern on the third insulating pattern.