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    • 42. 发明申请
    • PLASMA PROCESSING APPARATUS AND METHOD
    • 等离子体加工设备和方法
    • US20090223933A1
    • 2009-09-10
    • US12465436
    • 2009-05-13
    • Manabu IwataChishio KoshimizuYohei Yamazawa
    • Manabu IwataChishio KoshimizuYohei Yamazawa
    • B44C1/22
    • H01J37/32091H01J37/32183
    • A plasma processing apparatus for processing a substrate by using a plasma includes a processing chamber for accommodating and processing the substrate therein, a lower electrode for mounting the substrate thereon in the processing chamber, an upper electrode disposed to face the lower electrode in the processing chamber, a radio frequency power supply for supplying a radio frequency power to at least one of the lower and the upper electrode, to thereby generate the plasma between the lower and the upper electrode, and an electrical characteristic control unit for adjusting an impedance of a circuit at the side of an electrode to the plasma for a frequency of at least one radio frequency wave present in the processing chamber such that the circuit does not resonate.
    • 用于通过使用等离子体处理衬底的等离子体处理装置包括用于在其中容纳和处理衬底的处理室,用于将衬底安装在处理室中的下电极,设置成面对处理室中的下电极的上电极 ,用于向下电极和上电极中的至少一个提供射频电力的射频电源,从而在下电极和上电极之间产生等离子体;以及电特性控制单元,用于调节电路的阻抗 在等离子体的电极的侧面处于存在于处理室中的至少一个射频的频率,使得电路不共振。
    • 50. 发明授权
    • Plasma-process system with improved end-point detecting scheme
    • 等离子体处理系统具有改进的端点检测方案
    • US5290383A
    • 1994-03-01
    • US48711
    • 1993-04-19
    • Chishio Koshimizu
    • Chishio Koshimizu
    • H01J37/32H01L21/311H01L21/306B44C1/22C03C15/00C03C25/06
    • H01J37/32935H01J37/32963H01L21/31116Y10S156/916
    • In one aspect of the invention, CHF.sub.3 gas and CF.sub.4 gas (i.e., reactant gases), and argon gas (i.e., plasma-stabilizing gas) are introduced into a vacuum chamber. RF power is then applied between the electrodes within the chamber, thereby generating plasma. The plasma is applied to a substrate placed in the chamber, thus etching the SiO.sub.2 film formed on the substrate. A spectrometer extracts a light beam of a desired wavelength, emitted from the CF.sub.2 radical which contributes to the etching. An end-point detecting section monitors the luminous intensity of the CF.sub.2 radical reacting with SiO.sub.2 during the etching. Once the SiO.sub.2 film has been etched away, the luminous intensity of the CF.sub.2 radical increases. Upon detecting this increase, the section determines that etching has just ended. The selected wavelength ranges from 310 nm to 236 nm, preferably being 219.0 nm, 230.0 nm, 211.2 nm, 232.5 nm, or any one ranging from 224 nm to 229 nm. In another aspect of the invention, the device attached to the observation window of the chamber removes products stuck to the window during the etching. The window thus cleaned, more light than otherwise passes through the window and reaches the spectrometer. This enables the section to detect even a slight change in the luminous intensity of the CF.sub.2 radical, thereby detecting the end point of etching with accuracy.
    • 在本发明的一个方面,将CHF 3气体和CF 4气体(即反应气体)和氩气(即等离子体稳定气体)引入真空室。 然后将RF功率施加在室内的电极之间,从而产生等离子体。 将等离子体施加到放置在室中的衬底上,从而蚀刻形成在衬底上的SiO 2膜。 光谱仪提取从有助于蚀刻的CF 2自由基发射的期望波长的光束。 终点检测部分在蚀刻期间监测与SiO 2反应的CF 2自由基的发光强度。 一旦SiO 2膜被蚀刻掉,CF2自由基的发光强度就会增加。 在检测到这种增加时,该部分确定蚀刻刚刚结束。 所选择的波长范围为310nm至236nm,优选为219.0nm,230.0nm,211.2nm,232.5nm或224nm至229nm的任何一个。 在本发明的另一方面,连接到室的观察窗的装置在蚀刻期间去除粘附到窗口的产物。 如此清洁的窗户,比其他方式更光线通过窗户并到达光谱仪。 这使得该部分甚至可以检测到CF2基团的发光强度的轻微变化,从而精确地检测蚀刻的终点。