Semiconductor device gate structure and method of forming the same
First Claim
1. A gate structure, comprising:
- a gate electrode formed on a substrate, the gate electrode including a conductive material; and
a gate insulation layer enclosing a side surface of the gate electrode.
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Abstract
A MOS transistor includes a gate structure extending forrom a semiconductor substrate in a vertical direction is disclosed. The gate structure includes a gate electrode extending from the substrate in a vertical direction, and a gate insulation layer enclosing the gate electrode. A channel pattern encloses the gate insulation layer, and a first conductive pattern extends from a lower portion of the channel pattern in a first direction verticalperpendicular to the channel pattern and in parallel with the substrate. A second conductive pattern extends from an upper portion of the channel pattern in a second direction verticalperpendicular to the channel pattern and in parallel with the substrate. Accordingly, the channel length of the MOS transistor is determined by a distance between the first and second conductive patterns, and a channel width of the MOS transistor is determined by a diameter of the gate structure. Short channel and narrow width effects are sufficiently prevented in a MOS transistor.
78 Citations
104 Claims
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1. A gate structure, comprising:
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a gate electrode formed on a substrate, the gate electrode including a conductive material; and
a gate insulation layer enclosing a side surface of the gate electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A semiconductor device comprising:
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a gate structure including a gate electrode formed on a substrate, and a gate insulation layer enclosing a side surface of the gate electrode;
a channel pattern covering a surface of the gate insulation layer;
a first conductive pattern extending from a lower portion of the channel pattern; and
a second conductive pattern extending from an upper portion of the channel pattern. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A semiconductor device comprising:
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a gate structure including a gate electrode having a pillar shape extending from a substrate in a vertical direction, and a gate insulation layer enclosing a side surface of the gate electrode;
a channel pattern comprising single-crystalline silicon grown by an epitaxial process and having a cylindrical shape including inner and outer side surfaces, the inner side surface of the channel pattern making contact with a surface of the gate insulation layer;
a first conductive pattern enclosing the outer side surface of the channel pattern at a lower portion thereof and extending in a first direction perpendicular to the channel pattern; and
a second conductive pattern enclosing the outer side surface of the channel pattern at an upper portion thereof and extending in a second direction perpendicular to the channel pattern. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method of forming a gate structure, comprising:
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forming a gate insulation layer on a substrate, the gate insulation layer including inner and outer surfaces; and
forming a gate electrode making contact with the inner surface of the gate insulation layer. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
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55. A method of manufacturing a semiconductor device, comprising:
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forming a first conductive pattern on a substrate;
forming a second conductive pattern spaced apart from the first conductive pattern by a predetermined distance in a vertical direction;
forming a channel pattern including inner and outer side surfaces, the channel pattern making contact with the first and second patterns;
forming a gate insulation layer on the inner side surface of the channel pattern; and
forming a gate electrode making contact with the gate insulation layer. - View Dependent Claims (56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95)
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96. A method of manufacturing a semiconductor device, comprising:
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forming a first conductive layer on a substrate;
patterning the first conductive layer to thereby form a first conductive pattern;
forming a sacrificial layer on the substrate and the first conductive pattern;
forming a second conductive layer on the sacrificial layer;
forming a channel pattern having a pillar ring shape, the channel pattern penetrating the second conductive layer and the sacrificial layer and making contact with the first conductive pattern;
forming a gate insulation layer on an inner side surface of the pillar ring shaped channel pattern;
forming a gate electrode making contact with the gate insulation layer; and
patterning the second conductive layer to form a second conductive pattern making contact with the channel pattern. - View Dependent Claims (97, 98, 99, 100, 101, 102, 103, 104)
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Specification