摘要:
A method for forming a semiconductor device includes forming a first plurality of nanocrystals over a surface of a substrate having a first region and a second region, wherein the first plurality of nanocrystals is formed in the first region and the second region and has a first density; and, after forming the first plurality of nanocrystals, forming a second plurality of nanocrystals over the surface of the substrate in the second region and not the first region, wherein the first plurality of nanocrystals together with the second plurality of nanocrystals in the second region result in a second density, wherein the second density is greater than the first density.
摘要:
A method is provided for forming a semiconductor device having nanocrystals. The method includes: providing a substrate; forming a first insulating layer over a surface of the substrate; forming a first plurality of nanocrystals on the first insulating layer; forming a second insulating layer over the first plurality of nanocrystals; implanting a first material into the second insulating layer; and annealing the first material to form a second plurality of nanocrystals in the second insulating layer. The method may be used to provide a charge storage layer for a non-volatile memory having a greater nanocrystal density.
摘要:
A feature is formed in the NVM isolation region during the patterning and etching of an NVM device and a logic device such that the feature is of substantially equal height to the logic device and is well-defined so that it does not cause defect signals. A first conductive layer is formed over a substrate. The first conductive layer is patterned to expose at least a portion of the substrate in an NVM region and at least a portion of an isolation region. An NVM dielectric stack is formed over the first conductive layer, the exposed substrate, and the exposed isolation region, and a second conductive layer is formed over the NVM dielectric stack. The first and second conductive layers and the NVM dielectric stack are patterned to form a first gate and a second gate of an NVM cell in the NVM region and a feature over the isolation region. The feature comprises a portion of the first conductive layer, a portion of the NVM dielectric stack adjacent a first sidewall of the portion of the first conductive layer, and a portion of the second conductive layer adjacent the portion of the NVM dielectric stack.
摘要:
A method for forming a semiconductor device includes forming a first semiconductor layer over a substrate, forming a first photoresist layer over the first semiconductor layer, and using only a first single mask patterning the first photoresist layer to form a first patterned photoresist layer. The method further includes using the first patterned photoresist layer etching the first semiconductor layer to form a select gate and forming a charge storage layer over the select gate and a portion of the substrate. The method further includes forming a second semiconductor layer over the charge storage layer, forming a second photoresist layer over the second semiconductor layer, and using only a second single mask patterning the second photoresist layer to form a second patterned photoresist layer. The method further includes forming a control gate by anisotropically etching the second semiconductor layer and then subsequently isotropically etching the second semiconductor layer.
摘要:
A method is provided for forming a semiconductor device having nanocrystals. The method includes: forming a first insulating layer over a surface of a substrate; forming a first plurality of nanocrystals on the first insulating layer; implanting a first material into the first insulating layer; and annealing the first material to form a second plurality of nanocrystals in the first insulating layer. The method may be used to provide a charge storage layer for a non-volatile memory having a greater nanocrystal density.
摘要:
A method includes forming a silicon nitride layer and patterning it to form a first opening and a second opening separated by a first portion of silicon nitride. Gate material is deposited in the first and second openings to form first and second select gate structures in the first and second openings. Second and third portions of silicon nitride layer are removed adjacent to the first and second gate structures, respectively. A charge storage layer is formed over the semiconductor device after removing the second and third portions. First and second sidewall spacers of gate material are formed on the charge storage layer and adjacent to the first and second gate structures. The charge storage layer is etched using the first and second sidewall spacers as masks. The first portion is removed. A drain region is formed in the semiconductor layer between the first and second gate structures.
摘要:
A method is provided for forming a semiconductor device having nanocrystals. The method includes: forming a first insulating layer over a surface of a substrate; forming a first plurality of nanocrystals on the first insulating layer; implanting a first material into the first insulating layer; and annealing the first material to form a second plurality of nanocrystals in the first insulating layer. The method may be used to provide a charge storage layer for a non-volatile memory having a greater nanocrystal density.
摘要:
A method is provided for forming a semiconductor device having nanocrystals. The method includes: providing a substrate; forming a first insulating layer over a surface of the substrate; forming a first plurality of nanocrystals on the first insulating layer; forming a second insulating layer over the first plurality of nanocrystals; implanting a first material into the second insulating layer; and annealing the first material to form a second plurality of nanocrystals in the second insulating layer. The method may be used to provide a charge storage layer for a non-volatile memory having a greater nanocrystal density.
摘要:
A method for forming a semiconductor device includes forming a first semiconductor layer over a substrate, forming a first photoresist layer over the first semiconductor layer, and using only a first single mask patterning the first photoresist layer to form a first patterned photoresist layer. The method further includes using the first patterned photoresist layer etching the first semiconductor layer to form a select gate and forming a charge storage layer over the select gate and a portion of the substrate. The method further includes forming a second semiconductor layer over the charge storage layer, forming a second photoresist layer over the second semiconductor layer, and using only a second single mask patterning the second photoresist layer to form a second patterned photoresist layer. The method further includes forming a control gate by anisotropically etching the second semiconductor layer and then subsequently isotropically etching the second semiconductor layer.
摘要:
A method includes forming a silicon nitride layer and patterning it to form a first opening and a second opening separated by a first portion of silicon nitride. Gate material is deposited in the first and second openings to form first and second select gate structures in the first and second openings. Second and third portions of silicon nitride layer are removed adjacent to the first and second gate structures, respectively. A charge storage layer is formed over the semiconductor device after removing the second and third portions. First and second sidewall spacers of gate material are formed on the charge storage layer and adjacent to the first and second gate structures. The charge storage layer is etched using the first and second sidewall spacers as masks. The first portion is removed. A drain region is formed in the semiconductor layer between the first and second gate structures.