摘要:
A method for operating a chemical deposition chamber is disclosed. First, a digital liquid flow controller is provided to guide a precursor fluid into a chemical deposition chamber. Then, a pre-cleaning step is performed in the chemical deposition chamber. Later, a pre-tuning step is performed on the digital liquid flow controller so that the precursor fluid can be substantially stably guided into the chemical deposition chamber. Afterwards, the chemical deposition chamber is used to carry out the chemical deposition.
摘要:
Polishing slurry is transported via piping to flow into the closed loop control system. First, the polishing slurry flows into the ultrasonic concentration detector. Original data of the polishing slurry that is determined by means of ultrasonic concentration detector is a fluid velocity at that time. This determined value can be converted into weight percent concentration at that time by memory data table. The converted data of weight percent concentration will be transmitted into program logic controller (PLC), and the data of liquid level volume in the distribution tank will be transmitted into program logic controller at present. The program logic controller will then analyze whether the quantity of oxidant is sufficient. If the quantity of oxidant does not reach the required criterion, the program logic controller will control the analog valve to transmit a supplementary quantity of oxidant into the distribution tank via the analog valve and piping.
摘要:
A pressure suppression device for a chemical mechanical polishing machine. The chemical mechanical polishing machine includes a polishing table and a polishing head. The polishing table has a polishing pad and a polishing gas input through which a polishing gas is charged. The polishing head holds a wafer and has a wafer gas input through which a wafer gas is charged. The pressure suppression device has a pressure releasing component and a gas input tube coupled to the wafer gas input and the pressure releasing component. When a polishing pressure applied to the polishing pad is smaller than a wafer pressure applied to the wafer, the pressure releasing component releases a part of the wafer pressure until the wafer pressure is smaller than the polishing pressure. As a result, this prevents the wafer slippage or broken wafer that occur when the wafer is blown off from the polishing head by too much wafer pressure.
摘要:
A chemical mechanical polishing machine and a fabrication process using the same. The chemical mechanical polishing machine comprises a retainer ring having a plurality of slurry passages at the bottom of the retainer ring. The retainer ring further comprises a circular path. By conducting the slurry through the slurry passages and the circular, a wafer is planarized within the chemical mechanical polishing machine.
摘要:
A wafer polishing head for planarizing a wafer. The wafer polishing head comprises a carrier, a retaining ring, a first pressure chamber, a second pressure chamber and an automatic control system. The retaining ring is surrounding the carrier. The first pressure chamber having a first inner pressure is disposed above the retaining ring. The second pressure chamber having a second inner pressure is disposed on the carrier. The automatic control system is respectively coupled to the first pressure chamber and the second pressure chamber.
摘要:
A CMP machine includes several polishing tables mounted on a carousel, which rotates in one direction. Each of the polishing tables includes a polishing pad. Each polishing pad can polish one wafer on its first surface. Each polishing pad also has one distributing duct used to supply slurry onto the polishing pad. An exhaust duct is included to exhaust slurry, in which the exhaust duct has a first end and a second end. The first end of the exhaust duct is coupled to slurry. A regulating valve is included to regulate slurry exhaust. An exhaust pump is included to produce a exhausting force of slurry. The exhaust pump is coupled to the second end of the exhaust duct. A regulating valve controller is included to control the regulating valve.
摘要:
A process for cleaning a deposition chamber. The process includes feeding a fluorine-containing gas into the deposition chamber; maintaining the fluorine-containing gas in the deposition chamber at a first pressure; providing RF power to ignite plasma of the fluorine-containing gas within the deposition chamber; keeping the deposition chamber at a first temperature for a time period with the presence of the plasma; turning off the RF power to cease the plasma; and feeding a remote plasma containing free fluorine from a remote plasma source into the deposition chamber, without evacuating the deposition chamber, at the first temperature to clean interior surfaces of the deposition chamber.
摘要:
A plasma apparatus capable of adaptive impedance matching comprises a plasma reactor which can produce plasma to proceed with CVD (chemical vapor deposition) process, a bi-polar electrostatic chuck which locates inside the plasma reactor and is used to support and secure a wafer, an alternating current bias power supply which connects to the bi-polar electrostatic chuck supplies the voltage potential bias for ion-bombardment from plasma, and an impedance-matching circuit which connects the alternating current bias power supply to the bi-polar electrostatic chuck is used to balance the inner electrode power output and the outer electrode power output of the bi-polar electrostatic chuck.
摘要:
A pressure monitoring system arranged in a close loop circuit, intended to facilitate chemical mechanical polishing (CMP), is disclosed. The pressure monitoring circuit includes an air regulator, a pressure transducer, a pressure difference transducer and a pressure difference regulator. This hardware is equipped to facilitate finding three control parameters of the monitoring system—polishing pressure (Pp), pressure difference of the polishing pressure and a corresponding wafer pressure (Dp), and deviation of the output pressure difference from a set point pressure difference (Cp). By monitoring Pp, Dp and Cp, air streams in a CMP process can be effectively regulated on a real time basis and the troubleshooting procedure for the system hardware can be practically reduced.
摘要:
A controlled pressure regulation system generates the wafer-pressing pressures during a polishing operation. A wafer carrier head holds a wafer to be polished against a platen. A first and second pressure regulators respectively generate a first and second pressure onto the platen and the wafer carrier head to press the wafer to be polished. A first and second controllers are respectively connected to the first and second pressure regulators in control feedback loops to control the generation of the first and second pressures. The first and second pressures are controlled to obtain a desired difference of pressure between the first and second pressure.