Abstract:
Structures and formation methods of a semiconductor device structure are provided. The semiconductor device structure includes a gate stack over a semiconductor substrate and a protection element over the gate stack. The protection element has an upper portion and a lower portion between the upper portion and the gate stack, and the upper portion is wider than the lower portion. The semiconductor device structure also includes a spacer element over a side surface of the protection element and a sidewall of the gate stack. The semiconductor device structure further includes a conductive contact electrically connected to a conductive feature over the semiconductor substrate.
Abstract:
Embodiments for forming a fin field effect transistor (FinFET) device structure are provided. The FinFET device structure includes a fin structure extending above a substrate and a gate dielectric layer formed over the fin structure. The FinFET device structure also includes a gate electrode formed on the gate dielectric layer. The FinFET device structure further includes a number of gate spacers formed on sidewalls of the gate electrode. The gate spacers are in direct contact with the fin structure.
Abstract:
The present disclosure relates to a method of forming a gate structure that can be selectively adjusted to reduce critical-dimension (CD) variations. In some embodiments, the method is performed by forming a gate structure having a first length over a semiconductor substrate. The first length of the gate structure is measured and compared to a target length. If the first length differs from the target length by an amount that is greater than a threshold value, the first length is adjusted to converge upon the target length. By selectively adjusting the length of the gate structure, critical-dimension (CD) variations can be reduced, thereby increasing yield and reducing cost.
Abstract:
Embodiments of a method for forming a semiconductor device structure are provided. The method includes forming a gate stack over a semiconductor substrate and forming a sealing structure over a sidewall of the gate stack. The method also includes forming a dummy shielding layer over the semiconductor substrate, the sealing structure, and the gate stack. The method further includes performing an ion implantation process on the dummy shielding layer to form source and drain regions in the semiconductor substrate. In addition, the method includes removing the dummy shielding layer after the source and drain regions are formed.
Abstract:
The present disclosure relates to a method of forming a gate structure that can be selectively adjusted to reduce critical-dimension (CD) variations. In some embodiments, the method is performed by forming a gate structure having a first length over a semiconductor substrate. The first length of the gate structure is measured and compared to a target length. If the first length differs from the target length by an amount that is greater than a threshold value, the first length is adjusted to converge upon the target length. By selectively adjusting the length of the gate structure, critical-dimension (CD) variations can be reduced, thereby increasing yield and reducing cost.