摘要:
A method for clearing native oxide is described. A substrate is provided, including an exposed portion whereon a native oxide layer has been formed. A clearing process is performed to the substrate using nitrogen trifluoride (NF3) and ammonia (NH3) as a reactant gas, wherein the volumetric flow rate of NF3 is greater than that of NH3.
摘要:
A method for clearing native oxide is described. A substrate is provided, including an exposed portion whereon a native oxide layer has been formed. A clearing process is performed to the substrate using nitrogen trifluoride (NF3) and ammonia (NH3) as a reactant gas, wherein the volumetric flow rate of NF3 is greater than that of NH3.
摘要:
A method for clearing native oxide is described. A substrate is provided, including an exposed portion whereon a native oxide layer has been formed. A clearing process is performed to the substrate using nitrogen trifluoride (NF3) and ammonia (NH3) as a reactant gas, wherein the volumetric flow rate of NF3 is greater than that of NH3.
摘要:
A method for clearing native oxide is described. A substrate is provided, including an exposed portion whereon a native oxide layer has been formed. A clearing process is performed to the substrate using nitrogen trifluoride (NF3) and ammonia (NH3) as a reactant gas, wherein the volumetric flow rate of NF3 is greater than that of NH3.
摘要:
A method of forming a shallow trench isolation structure includes steps of providing a substrate having a patterned mask layer formed thereon, wherein a trench is located in the substrate and the patterned mask layer exposes the trench. Thereafter, a dielectric layer is formed over the substrate to fill the trench. Then, a main polishing process with a first polishing rate is performed to remove a portion of the dielectric layer. An assisted polishing process is performed to remove the dielectric layer and a portion of the mask layer. The assisted polishing process includes steps of providing a slurry in a first period of time and then providing a solvent and performing a polishing motion of a second polishing rate in a second period of time. The second polishing rate is slower than the first polishing rate. Further, the mask layer is removed.
摘要:
A complex chemical mechanical polishing process for planarizing a structure. The process comprises steps of performing a main polishing process with a first polishing rate, wherein a slurry is provided. An assisted polishing process is then performed to planarizing the structure. The assisted polishing process comprises steps of providing the slurry in a first period of time and then providing a solvent and performing a polishing motion of a second polishing rate in a second period of time. The second polishing rate is slower than the first polishing rate.
摘要:
A hybrid CMP system having a first platen and a second platen is provided. Two types of polish pads are mounted on the first platen and second platen. A lot of pattern wafers is prepared. Each pattern wafer has patterned features, and a first dielectric layer is disposed over a second dielectric layer and the patterned features. At least three foregoing pattern wafers of the lot are sequentially polished on the first platen to remove different amount of the first dielectric layer. Removal amount of each said foregoing pattern wafer is in-line measured and calculated to output a linear fitting curve of removal amount vs. polish time thereof. Based on the linear fitting curve, the rest of the pattern wafers of the same lot are sequentially polished on the first platen to reach a target thickness of remaining said first dielectric layer.
摘要:
A method of removing an insulating layer on a substrate is described, including a first CMP process and a second CMP process performed in sequence, wherein the polishing slurry used in the first CMP process and that used in the second CMP process have substantially the same pH value that exceeds 7.0. A cleaning step is conducted between the first and the second CMP processes to remove a specific substance which would otherwise cause undesired particles to form in the second CMP process.
摘要:
A method for forming a high stress layer is provided. According to the method, a substrate is put into a reactor of a PECVD machine and a reaction gas is added into the reactor. Then, an assistant reaction gas which has the molecular weight greater than or equal to the molecular weight of nitrogen gas is added into the reactor. Next, a carrier gas which has the molecular weight smaller than the molecular weight of nitrogen gas is added into the reactor to increase the bombarding efficiency in film deposition. Thereby, the high stress layer is formed on the substrate.
摘要:
A method of forming compressive nitride film is provided. The method includes performing a chemical vapor deposition (CVD) process to form a nitride film on a substrate, and the method is characterized by adding a certain gas, selected from among Ar, N2, Kr, Xe, and mixtures thereof. Due to the addition of the foregoing certain gas, it can reduce the compressive stress, thereby increasing PMOS drive current gain.