摘要:
One aspect of the present invention relates to a method of forming a non-volatile semiconductor memory device, involving the sequential or non-sequential steps of forming a charge trapping dielectric over a substrate, the substrate having a core region and a periphery region; removing at least a portion of the charge trapping dielectric in the periphery region; forming a gate dielectric in the periphery region; forming buried bitlines in the core region; removing at least a portion of the charge trapping dielectric positioned over the buried bitlines in the core region; forming a bitline isolation over the buried bitlines in the core region; and forming gates in the core region and the periphery region. Another aspect of the present invention relates to increasing the thickness of the gate dielectric in at least a portion of the periphery region simultaneously while forming the bitline isolation.
摘要:
One aspect of the present invention relates to a non-volatile semiconductor memory device, containing a silicon substrate; a tunnel oxide layer over the silicon substrate, the tunnel oxide layer comprising fluorine atoms; a charge trapping layer over the tunnel oxide layer; an electrode or poly layer over the charge trapping layer; and source and drain regions within the silicon substrate. Another aspect of the present invention relates to a method of making a non-volatile semiconductor memory cell having improved erase speed, involving the steps of providing a silicon substrate; forming a tunnel oxide layer comprising fluorine atoms over the silicon substrate; and forming non-volatile memory cells over the tunnel oxide layer.
摘要:
A process for making a semiconductor structure comprises implanting nitrogen through a layer comprising SiO2 into a substrate comprising Si, wherein the layer is on the substrate, and wherein the layer is from about 30 Å to about 300 Å thick.
摘要:
A gate structure for an ONO flash memory device includes a first layer of silicon oxide on top of a semiconductor substrate, a second layer of silicon oxide, a layer of silicon nitride sandwiched between the two silicon oxide layers, and a control gate on top of the second layer of silicon oxide. Nitrogen is implanted into the first layer of silicon oxide at less than normal energy levels to reduce the amount of damage to the underlying semiconductor substrate. After low energy nitrogen implantation, the semiconductor structure is heated to anneal out the implant damage and to diffuse the implanted nitrogen to the substrate and silicon oxide interface to cause SiN bonds to be formed at that interface. The SiN bonds is desirable because they improve the bonding strength at the interface and the nitrogen remaining in the silicon oxide layer increases the oxide bulk reliability.
摘要:
Methods and systems of fabricating a wordline protection structure are described. As described, the wordline protection structure includes a polysilicon structure formed adjacent to a memory core region. The polysilicon structure includes first doped region positioned on a core side of the polysilicon structure and a second doped region positioned on a spine side of the polysilicon structure. An un-doped region positioned between the first and second doped regions. A conductive layer is formed on top of the polysilicon structure and arranged so that it does not contact the un-doped region at either the transition between the first doped region and the un-doped region or the second doped region and un-doped region.
摘要:
A memory cell system is provided including forming a first insulator layer over a semiconductor substrate, forming a charge trap layer over the first insulator layer, forming a second insulator layer over the charge trap layer, forming a top blocking intermediate layer over the second insulator layer, and forming a contact layer over the top blocking intermediate layer.
摘要:
A semiconductor memory device may include an intergate dielectric layer of a high-K dielectric material interposed between a floating gate and a control gate. With this intergate high-K dielectric in place, the memory device may be erased using Fowler-Nordheim tunneling.
摘要:
Methods for fabricating a flash memory device are provided. A method comprises forming a plurality of gate stacks overlying a substrate. Each gate stack comprises a charge trapping layer and a control gate. The control gate is a first distance from the substrate. Adjacent gate stacks are a second distance apart. A cell spacer material layer is deposited and is etched to form a spacer about sidewalls of each gate stack. A source/drain impurity doped region is formed adjacent a first gate stack and a last gate stack. The first distance and the second distance are such that, when a voltage is applied to a gate stack during a READ operation, a fringing field is created between the control gate of the gate stack and the substrate and is sufficient to invert a portion of the substrate between the gate stack and an adjacent gate stack.
摘要:
A method for forming an integrated circuit system is provided including forming a memory section having a spacer with a substrate, forming an outer doped region of the memory section in the substrate, forming a barrier metal layer over the spacer, and forming a metal plug over the outer doped region and the barrier metal layer.
摘要:
A method for manufacturing a memory device that includes using a gap-filling material that inhibits charge coupling between memory devices. A semiconductor material is provided that has an active region and an isolation region. A charge trapping structure is formed over the active region and a layer of semiconductor material is formed over the charge trapping structure and the isolation region. A masking structure having sidewalls is formed on the layer of semiconductor material. Spacers are formed adjacent the sidewalls and the layer of semiconductor material is etched to form one or more conductive strips having opposing sides. The one or more conductive strips are formed over the active region. A dielectric material is formed adjacent to the opposing sides of each conductive strip. The dielectric material serves as a gap-filling material. A layer of semiconductor material is formed over the one or more conductive strips.