Abstract:
A thermal processing method is provided. First, a semiconductor substrate is provided. The semiconductor substrate has a metal-oxide-semiconductor transistor formed thereon. The metal-oxide-semiconductor transistor includes a gate and source and drain regions on two sides of the gate. Dopants are implanted into the source and drain region and the gate. Next, a cap layer is formed over the semiconductor substrate. Next, a first thermal process is performed, and then a second thermal process is performed. Next, the cap layer is removed. The thermal processing method is capable of uniformly heating a semiconductor substrate and reducing the pattern effect in the fabrication of a CMOS and to improve the performance of the CMOS.
Abstract:
A method for fabricating a semiconductor device is implemented by using a stress memorization technique. The method includes the following steps. Firstly, a substrate is provided, wherein a gate structure is formed over the substrate. Then, a pre-amorphization implantation process is performed to define an amorphized region at a preset area of the substrate with the gate structure serving as an implantation mask. During the pre-amorphization implantation process is performed, the substrate is controlled at a temperature lower than room temperature. Then, a stress layer is formed on the gate structure and a surface of the amorphized region. Then, a thermal treatment process is performed to re-crystallize the amorphized region of the substrate. Afterwards, the stress layer is removed.
Abstract:
A method of fabricating a MOS device comprises steps as follows: An interfacial layer, a high-k dielectric layer and a cover layer on a substrate are sequentially formed. Then an in-situ wet etching step is performed by sequentially using a first etching solution to etch the cover layer and using a second etching solution to etch the high-k dielectric layer and the interfacial layer until the substrate is exposed, wherein the second etching solution is a mixed etching solution containing the first etching solution.
Abstract:
A method of fabricating a CMOS device having high-k dielectric layer and metal gate electrode is provided. First, an isolation structure is formed in a substrate to define a first-type and a second-type MOS regions; an interfacial layer and a high-k dielectric layer are sequentially formed over the substrate; a first and a second cover layers are respectively formed over a portion of the high-k dielectric layer at the first-type MOS region and another portion of the high-k dielectric layer at the second-type MOS region; afterwards, an in-situ etching step is performed to sequentially etch the first and second cover layers using a first etching solution and to etch both the high-k dielectric layer and the interfacial layer using a second etching solution until the substrate is exposed. Wherein, the second etching solution is a mixed etching solution containing the first etching solution.
Abstract:
An exemplary method of etching sacrificial layer includes steps of: providing a substrate formed with a sacrificial layer and defined with a first region and a second region, the sacrificial layer disposed in both the first and second regions; forming a hard mask covering the first region while exposing the second region; performing a first etching process on the sacrificial layer to thin the sacrificial layer while forming a byproduct film overlying the thinned sacrificial layer; performing a second etching process on the byproduct film to remove a portion of the byproduct layer for exposing a portion of the thinned sacrificial layer, while another portion of the byproduct film disposed on sidewalls of the thinned sacrificial layer being remained; and performing a third etching process on the thinned sacrificial layer, to remove the portion of the thinned sacrificial layer exposed in the second etching process.
Abstract:
A self-aligned contact includes a lower contact disposed in a dielectric layer of a substrate and an upper contact disposed in the dielectric layer and directly on the lower contact, and electrically connected to the lower contact. The profile of the upper contact and the lower contact is zigzag.