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    • 40. 发明申请
    • METHOD AND SYSTEM RELATING TO FLUX DISTRIBUTION AND FILM DEPOSITION
    • 与流量分布和膜沉积相关的方法和系统
    • WO01040539A2
    • 2001-06-07
    • PCT/US2000/032764
    • 2000-12-01
    • C23C14/54G02B1/10
    • C23C14/54C23C14/543C23C14/545G02B1/10
    • A method and system for producing a thin film with highly uniform (or highly accurate custom graded) thickness on a flat or graded substrate (such as concave or convex optics), by sweeping the substrate across a vapor deposition source with controlled (and generally, time-varying) velocity. In preferred embodiments, the method includes the steps of measuring the source flux distribution (using a test piece that is held stationary while exposed to the source), calculating a set of predicted film thickness profiles, each film thickness profile assuming the measured flux distribution and a different one of a set of sweep velocity modulation recipes, and determining from the predicted film thickness profiles a sweep velocity modulation recipe which is adequate to achieve a predetermined thickness profile. Aspects of the invention include a practical method of accurately measuring source flux distribution, and a computer-implemented method employing a graphical user interface to facilitate convenient selection of an optimal or nearly optimal sweep velocity modulation recipe to achieve a desired thickness profile on a substrate. Preferably, the computer implements an algorithm in which many sweep velocity function parameters (for example, the speed at which each substrate spins about its center as it sweeps across the source) can be varied or set to zero.
    • 通过将衬底穿过气相沉积源(通常在其上,通常用于生产具有高度均匀(或高度准确的定制分级)厚度的薄膜的方法和系统,该平板或渐变衬底(例如凹形或凸形光学器件) 时变)速度。 在优选实施例中,该方法包括以下步骤:测量源通量分布(使用在暴露于源时保持静止的测试件),计算一组预测的膜厚度分布,每个薄膜厚度分布假设测量的磁通分布;以及 一组扫描速度调制配方中的不同的一个,并且从预测的膜厚度分布确定足以实现预定厚度分布的扫描速度调制配方。 本发明的方面包括精确测量源通量分布的实用方法,以及采用图形用户界面的计算机实现的方法,以促进方便地选择最佳或近似最佳的扫描速度调制配方以在衬底上实现期望的厚度分布。 优选地,计算机实现了一种算法,其中许多扫描速度函数参数(例如,每个基板绕其中心旋转,当其扫过源时的速度)可以被改变或设置为零。