Abstract:
본 실시예들은 스캔된 웨이퍼 형상의 두께를 연산하여 프로파일을 결정하고, 프로파일별 연산된 PV 값과 설정된 예측 PV 값을 이용하여 델타 보정값과 연마 종점 시간을 연산하여 연마 중인 각 웨이퍼의 연마 시간에 반영하는 메카니즘을 제공한다. 이에, 본 실시예들은 웨이퍼 표면의 우수한 평탄화를 이루고, 복수의 제어기를 동시에 제어하여 설비 비용을 줄인다.
Abstract:
By way of example, there is disclosed a final optical element for use with a chemical mechanical polish process to measure a reflectivity profile of a wafer being polished, having a transparent final optical element base material; and a transparent hydrophilic surface material. The final optical element base material may be hydrophilic or hydrophobic. There is also disclosed a chemical mechanical polishing apparatus having the final optical element, and a method of manufacturing the final optical element.
Abstract:
A polishing system includes a polishing station including a platen to support a polishing pad, a support to hold a substrate, an in-line metrology station to measure the substrate before or after polishing of a surface of the substrate in the polishing station, and a controller. The in-line metrology station includes a color line-scan camera, a white light source, a frame supporting the light source and the camera, and a motor to cause relative motion between the camera and the support along a second axis perpendicular to the first axis to cause the light source and the camera to scan across the substrate. The controller is configured to receive a color data from the camera, to generate a 2-dimensional color image from the color data, and to control polishing at the polishing station based on the color image.
Abstract:
A method of generating a library of reference spectra includes storing at least one reference spectrum, storing a plurality of different transmission curves, and for at least two transmission curves from the plurality of different transmission curves, calculating a modified reference spectrum from the reference spectrum and the transmission curve to generate a plurality of modified reference spectra. The transmission curves represent distortion to a spectrum introduced by variations in components in an optical path before a substrate surface.
Abstract:
In polishing a substrate having a layer of GST disposed over an underlying layer, during polishing, a non-polarized light beam is directed onto the layer of GST. The non-polarized light beam reflects from the first substrate to generate a reflected light beam having an infra-red component. A sequence of measurements of intensity of the infra-red component of the reflected light beam are generated, and, in a processor, a time at which the sequence of measurements exhibits a predefined feature is determined.
Abstract:
[0029] Apparatus useful for feeding a particulate starter material comprising nutrient and bacteria to a mixing tank, for solubilizing the starter material inside the mixing tank, for promoting growth of the bacteria and for discharging an aqueous slurry comprising the bacteria from the mixing tank. The apparatus preferably has a gravity-flow feeder and discharge port, does not require a pump, and comprises disposable parts.
Abstract:
A method of optically monitoring a substrate during polishing includes receiving an identification of a selected spectral feature and a characteristic of the selected spectral feature to monitor during polishing, measuring a first spectrum from the substrate during polishing, the first spectrum measured within an initial time following initiation of polishing, measuring a sequence of second spectra from the substrate during polishing, the sequence of second spectra measured after the initial time, for each second spectrum in the sequence of second spectra, removing the first spectrum from the second spectrum to generate a sequence of modified third spectra, determining a value of a characteristic of the selected spectral feature for each third spectrum in the sequence of third spectra to generate a sequence of values for the characteristic, and determining a polishing endpoint or an adjustment for a polishing rate based on the sequence of values.
Abstract:
A method of controlling polishing includes storing a library having a plurality of reference spectra, each reference spectrum of the plurality of reference spectra having a stored associated index value, polishing a substrate having a second layer overlying a first layer, measuring a sequence of spectra of light from the substrate during polishing, for each measured spectrum of the sequence of spectra, finding a best matching reference spectrum to generate a sequence of best matching reference spectra, determining the associated index value for each best matching spectrum from the sequence of best matching reference spectra to generate a sequence of index values, detecting exposure of the first layer, fitting a function to a portion of the sequence of index values corresponding to spectra measured after detection of exposure of the first layer, and determining a polishing endpoint or an adjustment for a polishing rate based on the function.