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    • 3. 发明授权
    • Direct non contact measurement
    • 直接非接触测量
    • US07046019B1
    • 2006-05-16
    • US11034122
    • 2005-01-12
    • Moshe SarfatySven Hermann
    • Moshe SarfatySven Hermann
    • G01R31/26H01L21/66
    • G01N23/2251
    • A method of measuring a lower similar layer that is separated from an upper similar layer by an intervening dissimilar layer in an integrated circuit. A first electron beam having a first relatively lower landing energy is directed at the integrated circuit. The first relatively lower landing energy is sufficient to completely penetrate the upper similar layer and insufficient to completely penetrate the intervening dissimilar layer, thereby producing first readings that are characteristic of the upper similar layer. A second electron beam having a second relatively higher landing energy is directed at the integrated circuit, the second relatively higher landing energy is sufficient to completely penetrate the upper similar layer, the intervening dissimilar layer, and the lower similar layer, thereby producing second readings that are characteristic of both the upper similar layer and the lower similar layer. The first readings that are characteristic of the upper similar layer are subtracted from the second readings that are characteristic of both the upper similar layer and the lower similar layer, to produce third readings that are characteristic of only the lower similar layer.
    • 一种测量通过集成电路中的中间不相似层与上部相似层分离的下部相似层的方法。 具有第一相对较低着陆能量的第一电子束被引导到集成电路。 第一相对较低的着陆能量足以完全穿透上部相似层并且不足以完全穿透介入的不同层,从而产生上部相似层的特征的第一读数。 具有第二较高着陆能量的第二电子束指向集成电路,第二相对较高的着陆能足以完全穿透上部相似层,中间不相似层和下部相似层,从而产生第二读数, 是上相似层和下相似层的特征。 从上部相似层和下部相似层的特征的第二个读数中减去上部相似层的特征的第一个读数,以产生只有较低相似层的特征的第三个读数。
    • 5. 发明授权
    • Method and apparatus for monitoring a process by employing principal component analysis
    • 采用主成分分析法监测过程的方法和装置
    • US06368975B1
    • 2002-04-09
    • US09348972
    • 1999-07-07
    • Lalitha BalasubramhanyaMoshe SarfatyJed DavidowDimitris Lymberopoulos
    • Lalitha BalasubramhanyaMoshe SarfatyJed DavidowDimitris Lymberopoulos
    • H01L21302
    • G05B23/024G01N21/274G01N21/3563G01N21/359G01N2201/1293
    • A method and apparatus for monitoring a process by employing principal component analysis are provided. Correlated attributes are measured for the process to be monitored (the production process). Principal component analysis then is performed on the measured correlated attributes so as to generate at least one production principal component; and the at least one production principal component is compared to a principal component associated with a calibration process (a calibration principal component). The calibration principal component is obtained by measuring correlated attributes of a calibration process, and by performing principal component analysis on the measured correlated attributes so as to generate at least one principal component. A principal component having a feature indicative of at least one of a desired process state, process event and chamber state then is identified and is designated as the calibration principal component. Preferably the at least one production principal component is compared to the calibration principal component by computing the inner product of the calibration and production principal components.
    • 提供了一种通过采用主成分分析来监测过程的方法和装置。 测量要监控的过程(生产过程)的相关属性。 然后对测量的相关属性执行主成分分析,以便生成至少一个生产主成分; 并且将至少一个生产主成分与与校准过程(校准主成分)相关联的主成分进行比较。 通过测量校准过程的相关属性以及通过对所测量的相关属性执行主成分分析以获得至少一个主成分来获得校准主成分。 识别具有指示期望的处理状态,处理事件和室状态中的至少一个的特征的主要成分,并将其指定为校准主成分。 优选地,通过计算校准和生产主要部件的内积来将至少一个生产主成分与校准主成分进行比较。
    • 10. 发明授权
    • Monitoring of film characteristics during plasma-based semi-conductor processing using optical emission spectroscopy
    • 使用光发射光谱法监测等离子体半导体处理期间的膜特性
    • US06633391B1
    • 2003-10-14
    • US09708258
    • 2000-11-07
    • Hakeem OluseyiMoshe Sarfaty
    • Hakeem OluseyiMoshe Sarfaty
    • G01N2173
    • G01N21/71
    • A method and system to monitor characteristics of films by sensing the spectral emissions of a plasma to which the films are exposed. As a result, the method includes sensing optical energy produced by the plasma. The optical energy has a plurality of spectral bands associated therewith, a subset of which is identified as including information corresponding to the film characteristics. The film characteristics are then measured as a function of this information. To increase the accuracy of the measurements, in one embodiment of the present invention a subgroup of the plurality of spectral bands is observed that has data associated that is substantially independent of the characteristics of interest. The characteristics are then measured as a function of both the information and the data.
    • 通过感测膜暴露于其中的等离子体的光谱发射来监测膜的特性的方法和系统。 结果,该方法包括感测由等离子体产生的光能。 光能具有与其相关联的多个光谱带,其一部分被识别为包括对应于胶片特性的信息。 然后根据该信息测量胶片特性。 为了提高测量的准确度,在本发明的一个实施例中,观察到具有与感兴趣特征基本上独立的数据相关联的多个频谱带的子组。 然后,根据信息和数据的不同,测量特征。