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    • 6. 发明授权
    • Method for plating copper conductors and devices formed
    • 电镀铜导体和器件的方法
    • US06344129B1
    • 2002-02-05
    • US09418197
    • 1999-10-13
    • Kenneth P. RodbellPanayotis C. AndricacosCyril Cabral, Jr.Lynne M. GignacCyprian E. UzohPeter S. Locke
    • Kenneth P. RodbellPanayotis C. AndricacosCyril Cabral, Jr.Lynne M. GignacCyprian E. UzohPeter S. Locke
    • C25D500
    • C25D5/10C25D3/38C25D5/00C25D7/123C25D21/02H05K3/423
    • A method for plating copper conductors on an electronic substrate and devices formed are disclosed. In the method, an electroplating copper bath that is filled with an electroplating solution kept at a temperature between about 0° C. and about 18° C. is first provided. A copper layer on the electronic substrate immersed in the electroplating solution is then plated either in a single step or in a dual-step deposition process. The dual-step deposition process is more suitable for depositing copper conductors in features that have large aspect ratios, such as a via hole in a dual damascene structure having an aspect ratio of diameter/depth of more than ⅓ or as high as {fraction (1/10)}. Various electroplating parameters are utilized to provide a short resistance transient in either the single step deposition or the dual-step deposition process. These parameters include the bath temperature, the bath agitation, the additive concentration in the plating bath, the plating current density utilized, the deposition rate of the copper film and the total thickness of the copper film deposited.
    • 公开了一种在电子基板上镀铜导体的方法和形成的器件。 在该方法中,首先提供填充有保持在约0℃至约18℃之间的温度的电镀溶液的电镀铜浴。 然后将浸在电镀溶液中的电子基板上的铜层以单步骤或双步沉积工艺进行镀覆。 双步沉积方法更适合于在具有大纵横比的特征中沉积铜导体,例如双镶嵌结构中的通孔,其直径/深度的纵横比大于1/3或高达{分数( 1/10)}。 各种电镀参数用于在单步沉积或双步沉积工艺中提供短电阻瞬变。 这些参数包括浴温度,浴液搅拌,镀浴中的添加剂浓度,所用的电镀电流密度,铜膜的沉积速率和沉积的铜膜的总厚度。
    • 8. 发明授权
    • Method for controlling chemical species concentration
    • 控制化学物质浓度的方法
    • US5352350A
    • 1994-10-04
    • US837468
    • 1992-02-14
    • Panayotis C. AndricacosJohn O. DukovicLubomyr T. Romankiw
    • Panayotis C. AndricacosJohn O. DukovicLubomyr T. Romankiw
    • C23C18/16C23F1/00C25D21/14G03F7/30G05D11/13G05D21/02C25D21/18C25D21/20
    • G03F7/3071C23C18/1617C23F1/00C25D21/14G05D11/139G05D21/02B01J2208/00628
    • A method is described for maintaining constant chemical composition in solutions used for wet chemical processing. All chemical species that are deliberately included in the bath are kept at constant concentration primarily by a method of compensating for their depletion or generation with a set of feed solutions that are formulated and dosed into the bath in accordance with an overall material balance. Further, all chemical species not deliberately included in the bath are kept at constant concentration primarily by keeping the aggregate volume of replenishing stocks in strict proportion to the process service performed by the bath (e.g. the charge passed in an electroplating cell). Finally, a time-based scheme completes the control of the concentration of all bath species by controlling any species (whether deliberately included in the bath or not) that is depleted or generated as the result of chemical reactions which occur independently and/or spontaneously with time. Maintaining all bath chemical species at constant concentration prevents bath aging and permits production of more uniform work pieces from the bath.
    • 描述了一种用于在用于湿化学处理的溶液中保持恒定化学成分的方法。 有意包含在浴中的所有化学物质主要通过补偿其消耗或产生的方法保持恒定浓度,所述方法通过根据整体物料平衡配制并投入浴中的一组进料溶液。 此外,不是故意包括在浴中的所有化学物质都保持恒定浓度,主要是通过保持补充料的总体积与由浴进行的处理服务(例如在电镀槽中通过的电荷)严格成比例。 最后,基于时间的方案通过控制任何物种(无论是故意包括在浴中)是否完全控制所有沐浴物种的浓度,由于化学反应的结果而耗尽或产生,这些化学反应独立地和/或自发地发生, 时间。 保持恒定浓度的所有浴化学物质可以防止沐浴老化,并允许从浴中生产更均匀的工件。