摘要:
A measurement system and a measurement method, which can obtain a measurement value close to a true value considering an overlay measurement error according to a higher order regression analysis model, is disclosed. The measurement system and the measurement method provide a technique for determining optimal positions of shots to be measured using an optimal experimental design. When the regression analysis model and the number of shots to be measured are determined in advance, a method is used for determining an optimal number of shots to be measured according to the regression analysis model and process dispersion using a confidence interval estimating method.
摘要:
A measurement system and a measurement method, which can obtain a measurement value close to a true value considering an overlay measurement error according to a higher order regression analysis model. The measurement system and the measurement method provide a technique for determining optimal positions of shots to be measured using an optimal experimental design. When the regression analysis model and the number of shots to be measured are determined in advance, a method is used for determining an optimal number of shots to be measured according to the regression analysis model and process dispersion using a confidence interval estimating method. A dynamic sampling method is used for dynamically changing the number and positions of shots to be measured according to a change in process features by combining the above two methods. And, when erroneous data is detected, or when measured data is missing, a robust regression analysis method and a technique for filtering the erroneous data and the missing data are used.
摘要:
A measurement system and a measurement method, which can obtain a measurement value close to a true value considering an overlay measurement error according to a higher order regression analysis model. The measurement system and the measurement method provide a technique for determining optimal positions of shots to be measured using an optimal experimental design. When the regression analysis model and the number of shots to be measured are determined in advance, a method is used for determining an optimal number of shots to be measured according to the regression analysis model and process dispersion using a confidence interval estimating method. A dynamic sampling method is used for dynamically changing the number and positions of shots to be measured according to a change in process features by combining the above two methods. And, when erroneous data is detected, or when measured data is missing, a robust regression analysis method and a technique for filtering the erroneous data and the missing data are used.
摘要:
A chemical solution dispensing device adapted for use with photo spinner equipment is disclosed. The device includes a nozzle adapted to spray chemical solution onto a wafer, a pressure sensor associated with the nozzle and adapted to sense a spraying pressure and generate a pressure value corresponding to the sensed spraying pressure, and a controller adapted to receive the pressure value, compare the received pressure value to a predetermined threshold pressure value, and generate an interlock signal when the received pressure value exceeds the predetermined threshold pressure value.
摘要:
A system is provided for adjusting a photo-exposure time of a manufacturing apparatus for semiconductor devices. The system for adjusting the photo-exposure time includes a photo-exposure unit whose photo-exposure time is adjustable according to one or more adjustment signals, a pre-exposure step influence prediction unit that obtains pre-exposure step processing information and extracts parameters that may influence a resulting pattern during photo-exposure, and provides this information as feed forward data, an inspection unit that checks processed steps during a certain period after photo-exposure and provides an inspection value as a feed back data, and a central processing unit that receives the feed forward and feedback data and, by means of a predetermined calculation method, generates the one or more adjustment signals, which are used to adjust the photo-exposure time.
摘要:
A system is provided for adjusting a photo-exposure time of a manufacturing apparatus for semiconductor devices. The system for adjusting the photo-exposure time includes a photo-exposure unit whose photo-exposure time is adjustable according to one or more adjustment signals, a pre-exposure step influence prediction unit that obtains pre-exposure step processing information and extracts parameters that may influence a resulting pattern during photo-exposure, and provides this information as feed forward data, an inspection unit that checks processed steps during a certain period after photo-exposure and provides an inspection value as a feed back data, and a central processing unit that receives the feed forward and feedback data and, by means of a predetermined calculation method, generates the one or more adjustment signals, which are used to adjust the photo-exposure time.
摘要:
A semiconductor wafer overlay correction method for an exposure process in a semiconductor fabricating stepper incorporates variations in equipment characteristics with time. The wafer overlay correction method includes measuring an overlay error correction value of a semiconductor wafer that is exposed by the stepper, calculating an overlay error correction value by summing the measured overlay error correction value, a variation in the stepper characteristics that is obtained through an empirical characterization of input changes, and a weighting value obtained from a predetermined plurality of wafer lots, and providing the calculated overlay error correction value to the semiconductor fabricating stepper to control an exposure process of a subsequent wafer lot.
摘要:
A system is provided for adjusting a photo-exposure time of a manufacturing apparatus for semiconductor devices. The system for adjusting the photo-exposure time includes a photo-exposure unit whose photo-exposure time is adjustable according to one or more adjustment signals, a pre-exposure step influence prediction unit that obtains pre-exposure step processing information and extracts parameters that may influence a resulting pattern during photo-exposure, and provides this information as feed forward data, an inspection unit that checks processed steps during a certain period after photo-exposure and provides an inspection value as a feed back data, and a central processing unit that receives the feed forward and feedback data and, by means of a predetermined calculation method, generates the one or more adjustment signals, which are used to adjust the photo-exposure time.
摘要:
A chemical solution dispensing device adapted for use with photo spinner equipment is disclosed. The device includes a nozzle adapted to spray chemical solution onto a wafer, a pressure sensor associated with the nozzle and adapted to sense a spraying pressure and generate a pressure value corresponding to the sensed spraying pressure, and a controller adapted to receive the pressure value, compare the received pressure value to a predetermined threshold pressure value, and generate an interlock signal when the received pressure value exceeds the predetermined threshold pressure value.
摘要:
A semiconductor manufacturing apparatus includes a wafer guide, and a wafer detecting system to determine whether a wafer is properly seated on a hot plate, by detecting temperature variations for the hot plate when the wafer is positioned onto the hot plate.