摘要:
A method for initializing process controllers based on tool event data includes providing a tool having a process controller adapted to employ a control model to control an operating recipe of the tool; receiving a tool event notification; and initializing the control model in response to receiving the tool event notification. A manufacturing system includes a tool and a process controller. The tool is adapted to process wafers in accordance with an operating recipe. The process controller is adapted to employ a control model to control the operating recipe in accordance with a control algorithm. The process controller is further adapted to receive a tool event notification and initialize the control model in response to receiving the tool event notification.
摘要:
A method for distinguishing between sources of process variation includes processing a plurality of manufactured items in a process flow; storing a set of production environment data associated with each of the manufactured items; identifying manufactured items associated with a process drift; generating a plurality of characteristic threads based on the production environment data; comparing the characteristic threads for at least those manufactured items associated with the process drift; and determining at least one potential cause for the process drift based on the comparison of the characteristic threads. A manufacturing system for distinguishing between sources of process variation is also provided. The manufacturing system includes a plurality of tools for processing manufactured items in a process flow, a database server, and a drift monitor.
摘要:
A method and an apparatus are provided for applying a self-adaptive filter to a drifting process. The method includes processing a workpiece, measuring an output characteristic of the processed workpiece and modifying a previous estimated process state based at least on the measured output characteristic. The method further includes estimating a next process state based at least on the modified previous estimated process state.
摘要:
A method and an apparatus are provided for parallel fault detection. The method comprises receiving data associated with processing of a workpiece by a first processing tool, receiving data associated with processing of a workpiece by a second processing tool and comparing at least a portion of the received data to a common fault model to determine if a fault associated with at least one of the processing of the workpiece by the first processing tool and processing of the workpiece by the second processing tool occurred.
摘要:
A method and an apparatus for characterizing an uncertainty factor relating to processing workpieces. A first processing step is performed upon a workpiece. A first uncertainty factor associated with the first processing step is calculated. A final uncertainty factor associated with an end-of-line parameter relating to the workpiece is calculated based upon the first uncertainty factor. A process control function based upon the final uncertainty factor is performed.
摘要:
A method and an apparatus for matching data related to an integrated metrology tool and a standalone metrology tool. At least one semiconductor wafer is processed. An integrated metrology tool and/or a standalone metrology tool is matched based upon a difference between metrology data relating to a processed semiconductor wafer acquired by the integrated metrology tool and metrology data acquired by the standalone metrology tool, using a controller.
摘要:
A method and an apparatus for acquiring pre-process and post-process integrated metrology data. A lot of semiconductor wafers is provided. A pre-process integrated metrology data acquisition from a first semiconductor wafer within the lot of semiconductor wafers is performed. A process operation on the first semiconductor wafer is performed at least partially during the process of acquiring pre-process metrology data from a second semiconductor wafer within the lot of semiconductor wafers. Post-process integrated metrology data is acquired from the first semiconductor wafer in response to processing of the first semiconductor wafer. The pre-process and the post-process metrology data is analyzed for evaluation of the process operation performed on the first semiconductor wafer.
摘要:
A method and an apparatus for performing cascade control of processing of semiconductor wafers. A first semiconductor wafer for processing is received. A second semiconductor wafer for processing is received. A cascade processing operation upon the first and the second semiconductor wafers is performed, wherein the cascade processing operation comprises acquiring pre-process metrology data related to the second semiconductor wafer during at least a portion of a time period wherein the first semiconductor wafer is being processed.
摘要:
A method and an apparatus for reducing process non-uniformity across a processed semiconductor wafers. A first semiconductor wafer is processed. A process non-uniformity associated with the first processed semiconductor wafer is identified. A feedback correction in response to the process non-uniformity during processing of a second semiconductor wafer is performed and/or a feed-forward compensation is performed in response to the process non-uniformity during a subsequent process performed across the first semiconductor wafer is performed.
摘要:
A method of compensating for across-wafer variations in photoresist thickness is provided. The method comprises providing a wafer having a process layer formed there-above, forming a layer of photoresist above the process layer, measuring a thickness of the layer of photoresist at a plurality of locations to result in a plurality of thickness measurements, providing the thickness measurements to a controller that determines, based upon the thickness measurements, an exposure dose of an exposure process to be performed on the layer of photoresist, and performing the exposure process on the layer of photoresist using the determined exposure dose. This exposure dose may be varied on a flash-by-flash basis as the stepper tool “steps” across the surface of wafers. That is, the exposure dose for a group of flashes, or for each flash, may be varied in response to the thickness measurements.