Super long channel device within VFET architecture
First Claim
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1. A method for forming a semiconductor device, the method comprising:
- forming a pair of semiconductor fins on a substrate;
forming a semiconductor pillar between the semiconductor fins on the substrate;
forming a bottom doped region that extends under all of the semiconductor fins and under part of the semiconductor pillar;
recessing the semiconductor pillar below a surface of the semiconductor fins; and
forming a conductive gate over a channel region of the semiconductor fins and the semiconductor pillar.
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Abstract
Embodiments are directed to methods and resulting structures for a vertical field effect transistor (VFET) having a super long channel. A pair of semiconductor fins is formed on a substrate. A semiconductor pillar is formed between the semiconductor fins on the substrate. A region that extends under all of the semiconductor fins and under part of the semiconductor pillar is doped. A conductive gate is formed over a channel region of the semiconductor fins and the semiconductor pillar. A surface of the semiconductor pillar serves as an extended channel region when the gate is active.
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Citations
9 Claims
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1. A method for forming a semiconductor device, the method comprising:
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forming a pair of semiconductor fins on a substrate; forming a semiconductor pillar between the semiconductor fins on the substrate; forming a bottom doped region that extends under all of the semiconductor fins and under part of the semiconductor pillar; recessing the semiconductor pillar below a surface of the semiconductor fins; and forming a conductive gate over a channel region of the semiconductor fins and the semiconductor pillar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification