摘要:
A field effect transistor includes a substrate comprising a fin structure. The field effect transistor further includes an isolation structure in the substrate. The field effect transistor further includes a source/drain (S/D) recess cavity below a top surface of the substrate. The S/D recess cavity is between the fin structure and the isolation structure. The field effect transistor further includes a strained structure in the S/D recess cavity. The strain structure includes a lower portion. The lower portion includes a first strained layer, wherein the first strained layer is in direct contact with the isolation structure, and a dielectric layer, wherein the dielectric layer is in direct contact with the substrate, and the first strained layer is in direct contact with the dielectric layer. The strained structure further includes an upper portion comprising a second strained layer overlying the first strained layer.
摘要:
A semiconductor device includes a semiconductor substrate and two fin structures. Channels of the fin structures include a second semiconductor material portion over a first semiconductor material portion. Source and drain regions of the first fin structure include a third semiconductor material portion over the first semiconductor material portion. Source and drain regions of the second fin structure include the second semiconductor material portion over the first semiconductor material portion and a fourth semiconductor material portion over the second semiconductor material portion. The first, second, third, and fourth semiconductor material portions are different in composition from each other.
摘要:
An integrated circuit transistor structure includes a semiconductor substrate, a first SiGe layer in at least one of a source area or a drain area on the semiconductor substrate, and a channel between the source area and the drain area. The first SiGe layer has a Ge concentration of 50 percent or more.
摘要:
The present disclosure provides a method of fabricating a semiconductor device that includes providing a semiconductor substrate, forming a trench in the substrate, where a bottom surface of the trench has a first crystal plane orientation and a side surface of the trench has a second crystal plane orientation, and epitaxially (epi) growing a semiconductor material in the trench. The epi process utilizes an etch component. A first growth rate on the first crystal plane orientation is different from a second growth rate on the second crystal plane orientation.
摘要:
A FinFET device and method for fabricating a FinFET device is disclosed. An exemplary method includes providing a semiconductor substrate; forming a fin structure over the semiconductor substrate, the fin structure including a first material portion over the semiconductor substrate and a second material portion over the first material portion; forming a gate structure over a portion of the fin structure, such that the gate structure traverses the fin structure, thereby separating a source region and a drain region of the fin structure, wherein the source and drain regions of the fin structure define a channel therebetween; removing the second material portion from the source and drain regions of the fin structure; and after removing the second material portion, forming a third material portion in the source and drain regions of the fin structure.
摘要:
The present disclosure provides an integrated circuit device and method for manufacturing the integrated circuit device. The disclosed method provides substantially defect free epitaxial features. An exemplary method includes forming a gate structure over the substrate; forming recesses in the substrate such that the gate structure interposes the recesses; and forming source/drain epitaxial features in the recesses. Forming the source/drain epitaxial features includes performing a selective epitaxial growth process to form an epitaxial layer in the recesses, and performing a selective etch back process to remove a dislocation area from the epitaxial layer.
摘要:
A method of performing an ultraviolet (UV) curing process on an interfacial layer over a semiconductor substrate, the method includes supplying a gas flow rate ranging from 10 standard cubic centimeters per minute (sccm) to 5 standard liters per minute (slm), wherein the gas comprises inert gas. The method further includes heating the interfacial layer at a temperature less than or equal to 700° C. Another method of performing an annealing process on an interfacial layer over a semiconductor substrate, the second method includes supplying a gas flow rate ranging from 10 sccm to 5 slm, wherein the gas comprises inert gas. The method further includes heating the interfacial layer at a temperature less than or equal to 600° C.
摘要:
A method for fabricating a fin field-effect transistor (FinFET) device includes providing a substrate having a first fin at a first location, and epitaxially growing a second fin on the substrate at the first location. The epitaxial growth is performed at a first temperature. The method further includes performing a thermal annealing at a second temperature in oxygen ambient on the substrate with the second fin thereon to grow an interface wrapping over the second fin. The second temperature is higher than the first temperature.
摘要:
A field effect transistor includes a substrate comprising a fin structure. The field effect transistor further includes an isolation structure in the substrate. The field effect transistor further includes a source/drain (S/D) recess cavity below a top surface of the substrate. The S/D recess cavity is between the fin structure and the isolation structure. The field effect transistor further includes a strained structure in the S/D recess cavity. The strain structure includes a lower portion. The lower portion includes a first strained layer, wherein the first strained layer is in direct contact with the isolation structure, and a dielectric layer, wherein the dielectric layer is in direct contact with the substrate, and the first strained layer is in direct contact with the dielectric layer. The strained structure further includes an upper portion comprising a second strained layer overlying the first strained layer.
摘要:
An embodiment of a method for forming a transistor that includes providing a semiconductor substrate having a source/drain region is provided where a first SiGe layer is formed over the source/drain region. A thermal oxidation is performed to convert a top portion of the first SiGe layer to an oxide layer and a bottom portion of the first SiGe layer to a second SiGe layer. A thermal diffusion process is performed after the thermal oxidation is performed to form a SiGe area from the second SiGe layer. The SiGe area has a higher Ge concentration than the first SiGe layer.