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    • 1. 发明授权
    • Planarization of copper damascene using reverse current electroplating and chemical mechanical polishing
    • 使用反电流电镀和化学机械抛光对铜镶嵌进行平面化
    • US06815336B1
    • 2004-11-09
    • US09160965
    • 1998-09-25
    • Shau-Lin ShueSyun-Ming Jang
    • Shau-Lin ShueSyun-Ming Jang
    • H01L214763
    • H01L21/2885H01L21/3212H01L21/32134H01L21/7684
    • Methods are disclosed to improve the planarization of copper damascene by the steps of patterning on the copper damascene a photoresist using a reverse tone photo mask or a reverse tone photo mask of the metal lines, removing excess copper by reverse current plating or by dry or wet chemical etching, stripping the photo resist, and a subsequent chemical mechanical planarization of the copper damascene. Lastly a cap layer is applied to the planarized surface. In a variant of the disclosed method a more relaxed reverse tone photo mask of the metal lines is used, which may be more desirable for practical use. These steps provide benefits such as improved uniformity of the wafer surface, reduce the dishing of metal lines (trenches) and pads, and reduce oxide erosion.
    • 公开了通过以下步骤来改善铜镶嵌的平面化的步骤:使用反色调光掩模或金属线的反色调光掩模在铜镶嵌光致抗蚀剂上进行图案化,通过反向电镀或通过干或湿去除多余的铜 化学蚀刻,剥离光致抗蚀剂,以及铜镶嵌件的随后的化学机械平面化。 最后,将覆盖层施加到平坦化表面。 在所公开的方法的变型中,使用金属线的更宽松的反向色调光掩模,这对于实际使用可能是更理想的。 这些步骤提供了诸如改善晶片表面的均匀性,减少金属线(沟槽)和焊盘的凹陷以及减少氧化物侵蚀的益处。
    • 2. 发明授权
    • Reduction of Cu line damage by two-step CMP
    • 通过两步CMP减少Cu线损伤
    • US06620725B1
    • 2003-09-16
    • US09395287
    • 1999-09-13
    • Shau-Lin ShueMing-Hsing TsaiWen-Jye TsaiYing-Ho ChenTsu ShihJih-Churng TwuSyun-Ming Jang
    • Shau-Lin ShueMing-Hsing TsaiWen-Jye TsaiYing-Ho ChenTsu ShihJih-Churng TwuSyun-Ming Jang
    • H01L214763
    • H01L21/7684H01L21/3212
    • A process for performing CMP in two steps is described. After trenches have been formed and over-filled with copper, in a first embodiment of the invention a hard pad is used initially to remove most of the copper until a point is reached where dishing effects would begin to appear. A soft pad is then substituted and CMP continued until all copper has been removed, except in the trenches. In a second embodiment, CMP is initiated using a pad to which high-pressure is applied and which rotates relatively slowly. As before, this combination is used until the point is reached where dishing effects would begin to appear. Then, relatively low pressure in combination with relatively high rotational speed is used until all copper has been removed, except in the trenches. Both of these embodiments result in trenches which are just-filled with copper, with little or no dishing effects, and with all traces of copper removed everywhere except in the trenches themselves.
    • 描述用于在两个步骤中执行CMP的过程。 在沟槽已经形成并且用铜过度填充之后,在本发明的第一实施例中,最初使用硬焊盘去除大部分铜,直到达到一个点,其中凹陷效应将开始出现。 然后取代软焊盘,继续CMP直到除了沟槽中除去所有的铜。 在第二实施例中,使用施加高压并且相对缓慢地旋转的衬垫来启动CMP。 如前所述,使用这种组合,直到达到点,其中凹陷效应将开始出现。 然后,除了沟槽之外,使用相对较低的压力结合相对高的转速直到除去所有的铜。 这两个实施例都导致刚好填充铜的沟槽,几乎没有凹陷效应,并且除了沟槽本身之外,所有痕迹的铜都被去除。
    • 3. 发明授权
    • Eliminate broken line damage of copper after CMP
    • 消除CMP后的铜线损伤
    • US06736701B1
    • 2004-05-18
    • US09989838
    • 2001-11-20
    • Shau-Lin ShueYing-Ho ChenWen-Chih ChiouTsu ShihSyun-Ming Jang
    • Shau-Lin ShueYing-Ho ChenWen-Chih ChiouTsu ShihSyun-Ming Jang
    • B24B100
    • B24B37/042B24B21/04
    • A new method is provided for the post-deposition treatment of copper lines. A damascene copper line pattern whereby a TaN barrier layer and a seed layer have been provided is polished. Under the first embodiment of the invention, the deposited copper is polished (Cu CMP), the surface of the wafer is rinsed using a first High Flow DI rinse that contains a TBA inhibitor. The TaN CMP is performed immediately following the first High Flow DI rinse. A second High Flow DI rinse is applied using DI water that contains TBA inhibitor. The required following rinse step is executed immediately after the second High Flow DI rinse has been completed. Under the second embodiment of the invention, the process of CMP has been divided in two distinct steps where the first step is aimed at corrosion elimination and the second step is aimed at elimination of mechanical damage to the polished copper. The processing conditions for the second processing step have been extended and optimized, thereby using a second belt of a CMP apparatus.
    • 提供了一种新的铜线后处理方法。 抛光已经提供TaN阻挡层和种子层的镶嵌铜线图案。 在本发明的第一实施例中,抛光沉积的铜(Cu CMP),使用含有TBA抑制剂的第一高流量DI冲洗冲洗晶片的表面。 在第一次高流量DI冲洗之后立即执行TaN CMP。 使用含有TBA抑制剂的去离子水进行第二次高流量DI冲洗。 第二次高流量DI冲洗完成后立即执行所需的冲洗步骤。 在本发明的第二个实施方案中,CMP的方法分为两个不同的步骤,其中第一步骤旨在消除腐蚀,第二步骤旨在消除抛光铜的机械损伤。 第二处理步骤的处理条件已被扩展和优化,从而使用CMP设备的第二带。