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    • 2. 发明申请
    • PREDICTION AND COMPENSATION OF EROSION IN A MAGNETRON SPUTTERING TARGET
    • 磁控溅射目标中的腐蚀预测和补偿
    • WO2009085157A1
    • 2009-07-09
    • PCT/US2008/013766
    • 2008-12-16
    • APPLIED MATERIALS, INC.MILLER, Keith, A.LUBBEN, Daniel, C.
    • MILLER, Keith, A.LUBBEN, Daniel, C.
    • H01L21/203
    • C23C14/35H01J37/3408H01J37/3482
    • When a magnetron (72) is scanned about the back of a target (38) in a selected complex path (150) having radial components, the target erosion profile has a form depending upon the selection of paths. A radial erosion rate profile (160) for a given magnetron is measured. Periodically during scanning, an erosion profile (168) is calculated from the measured erosion rate profile (160) and profiles (162, 164, 166) derived from it, the time the magnetron spends at different radii, and the target power. The calculated erosion profile may be used to indicate when erosion has become excessive at any location prompting target replacement or to adjust the height of the magnetron above the target for repeated scans, hi another aspect of the invention, the magnetron height is dynamically adjusted (206) during a scan to compensate for erosion. The compensation may be based on the calculated erosion profile or on feedback control of the present value of the target voltage (124) for a constant-power target supply (110).
    • 当在具有径向分量的选定复合路径(150)中围绕目标(38)的背面扫描磁控管(72)时,目标侵蚀曲线具有取决于路径选择的形式。 测量给定磁控管的径向侵蚀速率曲线(160)。 在扫描期间,根据测得的侵蚀速率曲线(160)和衍生自其的轮廓(162,164,166),磁控管在不同半径处的时间和目标功率计算出侵蚀曲线(168)。 所计算的侵蚀曲线可用于指示在任何位置处的侵蚀已经变得过度,促使目标更换或调整靶上方的磁控管的高度以重复扫描。在本发明的另一方面,磁控管高度被动态地调节(206 ),以补偿侵蚀。 补偿可以基于所计算的侵蚀曲线或者针对恒定功率目标电源(110)的目标电压(124)的当前值的反馈控制。
    • 4. 发明申请
    • PLANETARY MAGNETRON
    • WO2003100819A1
    • 2003-12-04
    • PCT/US2003/015620
    • 2003-05-16
    • APPLIED MATERIALS, INC.
    • HONG, Ilyoung, RichardTSUNG, James, H.MILLER, Michael, AndrewLUBBEN, Daniel, C.DING, PeijunMAITY, Nirmalya
    • H01J37/34
    • H01J37/3408H01J37/3455
    • A small unbalanced magnet assembly (60) is scanned in a preferably retrograde planetary or epicyclic path (92) about the back of a target (90) being plasma sputtered including an orbital rotation about the center axis (72) of the target and a planetary rotation about another axis rotating about the target center axis. The magnet assembly may pass through the target center, thus allowing full target coverage. A geared planetary mechanism may include a rotating drive plate (74), a fixed center gear (62), and an idler gear (76) and a follower gear (74) rotatably supported in the drive plate supporting a cantilevered magnet assembly (84) on the side of the drive plate facing the target. A belt (342) and pulleys (344, 346) may be substituted for the gears. The erosion profile may be controlled by varying the rotation rate through the rotation cycle or by modulating the target power. A second planetary stage (302, 304, 306) may be added or non-circular gears (310) be used. Auxiliary electromagnetic coils (254, 258) positioned beside the chamber and below the pedestal (122) may create a focusing magnetic field.
    • 小型不平衡磁体组件(60)以优选逆行星行星或行星路径(92)围绕靶(90)的背面进行扫描,该等离子体溅射包括围绕靶的中心轴线(72)的轨道旋转和行星 围绕围绕目标中心轴线旋转的另一轴线旋转。 磁体组件可以穿过目标中心,从而允许完全的目标覆盖。 齿轮行星机构可以包括旋转驱动板(74),固定中心齿轮(62)和空转齿轮(76),以及可旋转地支撑在支撑悬臂磁体组件(84)的驱动板中的从动齿轮(74) 在驱动板面对目标的一侧。 皮带(342)和滑轮(344,346)可以代替齿轮。 可以通过改变通过旋转周期的旋转速率或通过调节目标功率来控制侵蚀曲线。 可以添加第二行星台(302,304,306)或使用非圆形齿轮(310)。 位于腔室旁边和底座(122)下方的辅助电磁线圈(254,258)可产生聚焦磁场。