Semiconductor Devices and Methods of Manufacture Thereof
First Claim
1. A method of manufacturing a semiconductor device, the method comprising:
- partially manufacturing a fin field effect transistor (FinFET) including a semiconductor fin comprising a first semiconductive material and a second semiconductive material disposed over the first semiconductive material;
removing a top portion of the second semiconductive material of the semiconductor fin;
exposing a top portion of the first semiconductive material;
removing the top portion of the first semiconductive material from beneath the second semiconductive material;
oxidizing the first semiconductive material and the second semiconductive material, wherein oxidizing the first semiconductive material and the second semiconductive material comprises forming a first oxide comprising a first thickness on the first semiconductive material and forming a second oxide comprising a second thickness on the second semiconductive material, the first thickness being greater than the second thickness;
removing the second oxide from the second semiconductive material; and
completing manufacturing of the FinFET.
1 Assignment
0 Petitions
Accused Products
Abstract
Semiconductor devices and methods of manufacture thereof are disclosed. In some embodiments, a method of manufacturing a semiconductor device includes partially manufacturing a fin field effect transistor (FinFET) including a semiconductor fin comprising a first semiconductive material and a second semiconductive material disposed over the first semiconductive material. A top portion of the second semiconductive material of the semiconductor fin is removed, and a top portion of the first semiconductive material is exposed. A top portion first semiconductive material is removed from beneath the second semiconductive material. The first semiconductive material and the second semiconductive material are oxidized, forming a first oxide comprising a first thickness on the first semiconductive material and a second oxide comprising a second thickness on the second semiconductive material, the first thickness being greater than the second thickness. The second oxide is removed from the second semiconductive material, and manufacturing of the FinFET is completed.
18 Citations
28 Claims
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1. A method of manufacturing a semiconductor device, the method comprising:
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partially manufacturing a fin field effect transistor (FinFET) including a semiconductor fin comprising a first semiconductive material and a second semiconductive material disposed over the first semiconductive material; removing a top portion of the second semiconductive material of the semiconductor fin; exposing a top portion of the first semiconductive material; removing the top portion of the first semiconductive material from beneath the second semiconductive material; oxidizing the first semiconductive material and the second semiconductive material, wherein oxidizing the first semiconductive material and the second semiconductive material comprises forming a first oxide comprising a first thickness on the first semiconductive material and forming a second oxide comprising a second thickness on the second semiconductive material, the first thickness being greater than the second thickness; removing the second oxide from the second semiconductive material; and completing manufacturing of the FinFET. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of manufacturing a semiconductor device, the method comprising:
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partially manufacturing a fin field effect transistor (FinFET) including a semiconductor fin comprising a first semiconductive material disposed over a workpiece, the first semiconductive material being adjacent an isolation region, the semiconductor fin further comprising a second semiconductive material disposed over the first semiconductive material; removing a top portion of the second semiconductive material of the semiconductor fin; recessing the isolation region to expose sidewalls of a top portion of the first semiconductive material; removing the top portion of the first semiconductive material from beneath the second semiconductive material; oxidizing the first semiconductive material and the second semiconductive material, wherein oxidizing the first semiconductive material and the second semiconductive material forms a first oxide comprising a first thickness on the first semiconductive material and forms a second a second oxide comprising a second thickness on the second semiconductive material, the first thickness being greater than the second thickness; removing the second oxide from the second semiconductive material and removing a portion of the first oxide from the first semiconductive material; forming a gate dielectric over and around the second semiconductive material; and forming a gate over and around the gate dielectric. - View Dependent Claims (10, 11, 12)
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13-20. -20. (canceled)
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21. A method of manufacturing a semiconductor device, the method comprising:
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providing a semiconductor fin, wherein the semiconductor fin comprises; a first semiconductive material; and a second semiconductive material over the first semiconductive material, wherein the second semiconductive material comprises a first portion on an opposite side of the first semiconductive material; removing the first portion of the second semiconductive material; recessing the first semiconductive material; forming a first oxide with a first thickness on the first semiconductive material; forming a second oxide with a second thickness around the second semiconductive material, the first thickness being greater than the second thickness; removing the second oxide from the second semiconductive material; and forming a gate dielectric around the second semiconductive material. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification