摘要:
A semiconductor process and apparatus are disclosed for forming a split-gate thin film storage NVM device (10) by forming a select gate structure (3) on a first dielectric layer (2) over a substrate (1); forming a control gate structure (6) on a second dielectric layer (5) having embedded nanocrystals (15, 16) so that the control gate (6) is adjacent to the select gate structure (3) but separated therefrom by a gap (8); forming a floating doped region (4) in the substrate (1) below the gap (8) formed between the select gate structure and control gate structure; and forming source/drain regions (11, 12) in the substrate to define a channel region that includes the floating doped region (4).
摘要:
A semiconductor process and apparatus are disclosed for forming a split-gate thin film storage NVM device (10) by forming a select gate structure (3) on a first dielectric layer (2) over a substrate (1); forming a control gate structure (6) on a second dielectric layer (5) having embedded nanocrystals (15, 16) so that the control gate (6) is adjacent to the select gate structure (3) but separated therefrom by a gap (8); forming a floating doped region (4) in the substrate (1) below the gap (8) formed between the select gate structure and control gate structure; and forming source/drain regions (11, 12) in the substrate to define a channel region that includes the floating doped region (4).
摘要:
A method of making a semiconductor device on a semiconductor layer includes forming a gate dielectric and a first layer of gate material over the gate dielectric. The first layer is etched to remove a portion of the first layer of gate material over a first portion of the semiconductor layer and to leave a select gate portion. A storage layer is formed over the select gate portion and over the first portion of the semiconductor layer. A second layer of gate material is formed over the storage layer. The second layer of gate material is etched to remove a first portion of the second layer of gate material over a first portion of the select gate portion. A portion of the first portion of the select gate is etched out to leave an L-shaped select structure. The result is a memory cell with an L-shaped select gate.
摘要:
A method of making a semiconductor device on a semiconductor layer includes forming a gate dielectric and a first layer of gate material over the gate dielectric. The first layer is etched to remove a portion of the first layer of gate material over a first portion of the semiconductor layer and to leave a select gate portion. A storage layer is formed over the select gate portion and over the first portion of the semiconductor layer. A second layer of gate material is formed over the storage layer. The second layer of gate material is etched to remove a first portion of the second layer of gate material over a first portion of the select gate portion. A portion of the first portion of the select gate is etched out to leave an L-shaped select structure. The result is a memory cell with an L-shaped select gate.
摘要:
A method of making a semiconductor device on a semiconductor layer includes: forming a gate dielectric over the semiconductor layer; forming a layer of gate material over the gate dielectric; etching the layer of gate material to form a select gate; forming a storage layer that extends over the select gate and over a portion of the semiconductor layer; depositing an amorphous silicon layer over the storage layer; etching the amorphous silicon layer to form a control gate; and annealing the semiconductor device to crystallize the amorphous silicon layer.
摘要:
A method of making a semiconductor device on a semiconductor layer includes: forming a gate dielectric over the semiconductor layer; forming a layer of gate material over the gate dielectric; etching the layer of gate material to form a select gate; forming a storage layer that extends over the select gate and over a portion of the semiconductor layer; depositing an amorphous silicon layer over the storage layer; etching the amorphous silicon layer to form a control gate; and annealing the semiconductor device to crystallize the amorphous silicon layer.
摘要:
A method of making a semiconductor structure uses a substrate having a background doping of a first type. A gate structure has a gate dielectric on the substrate and a select gate layer on the gate dielectric. Implanting is performed into a first portion of the substrate adjacent to a first end with dopants of a second type. The implanting is prior to any dopants being implanted into the background doping of the first portion which becomes a first doped region of the second type. An NVM gate structure has a select gate, a storage layer having a first portion over the first doped region, and a control gate over the storage layer. Implanting at a non-vertical angle with dopants of the first type forms a deep doped region under the select gate. Implanting with dopants of the second type forms a source/drain extension.
摘要:
A method of making a semiconductor device on a semiconductor layer is provided. The method includes: forming a select gate dielectric layer over the semiconductor layer; forming a select gate layer over the select gate dielectric layer; and forming a sidewall of the select gate layer by removing at least a portion of the select gate layer. The method further includes growing a sacrificial layer on at least a portion of the sidewall of the select gate layer and under at least a portion of the select gate layer and removing the sacrificial layer to expose a surface of the at least portion of the sidewall of the select gate layer and a surface of the semiconductor layer under the select gate layer. The method further includes forming a control gate dielectric layer, a charge storage layer, and a control gate layer.
摘要:
A method of making a semiconductor device on a semiconductor layer is provided. The method includes: forming a select gate dielectric layer over the semiconductor layer; forming a select gate layer over the select gate dielectric layer; and forming a sidewall of the select gate layer by removing at least a portion of the select gate layer. The method further includes growing a sacrificial layer on at least a portion of the sidewall of the select gate layer and under at least a portion of the select gate layer and removing the sacrificial layer to expose a surface of the at least portion of the sidewall of the select gate layer and a surface of the semiconductor layer under the select gate layer. The method further includes forming a control gate dielectric layer, a charge storage layer, and a control gate layer.
摘要:
A method of making a semiconductor structure uses a substrate having a background doping of a first type. A gate structure has a gate dielectric on the substrate and a select gate layer on the gate dielectric. Implanting is performed into a first portion of the substrate adjacent to a first end with dopants of a second type. The implanting is prior to any dopants being implanted into the background doping of the first portion which becomes a first doped region of the second type. An NVM gate structure has a select gate, a storage layer having a first portion over the first doped region, and a control gate over the storage layer. Implanting at a non-vertical angle with dopants of the first type forms a deep doped region under the select gate. Implanting with dopants of the second type forms a source/drain extension.