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    • 22. 发明授权
    • Process for improving copper fill integrity
    • 改善铜填充完整性的工艺
    • US06383943B1
    • 2002-05-07
    • US09687160
    • 2000-10-16
    • Chao-Cheng ChenJen-Cheng LiuJyu-Horng ShiehChia-Shiung TsaiBor-Shyang Lin
    • Chao-Cheng ChenJen-Cheng LiuJyu-Horng ShiehChia-Shiung TsaiBor-Shyang Lin
    • H01L21302
    • H01L21/76843H01L21/3105H01L21/76802H01L21/76814H01L21/76826H01L21/76829
    • A method for eliminating the problems associated with the discontinuous deposition of the glue layer at the bottom of the via resulting from the notch in the silicon nitride etch stop layer. First conductive layer traces are patterned and a silicon nitride (SiN) etch stop layer is provided overlying the first conductive layer. An inter-metal dielectric (IMD) layer then overlies the entire surface. An anisotropic etch is performed leaving via holes in the IMD layer. This is followed by a second anisotropic etch step to remove the etch stop layer not protected by the IMD layer resulting in the formation a notch at the bottom of the via hole. An important step of the present invention is the elimination of this notch accomplished by nitridizing the surface of the IMD layer. A wet polymer cleaning is performed to remove the nitridized IMD surface and eliminating the notch. A glue layer is conformally applied lining the via hole. A second conductive layer is then deposited and the surface is planarized.
    • 一种用于消除与在氮化硅蚀刻停止层中由凹口产生的通孔底部的胶层不连续沉积相关的问题的方法。 图案化第一导电层迹线,并且覆盖第一导电层提供氮化硅(SiN)蚀刻停止层。 金属间电介质(IMD)层然后覆盖整个表面。 进行各向异性蚀刻,留下IMD层中的通孔。 然后进行第二个各向异性蚀刻步骤以去除不被IMD层保护的蚀刻停止层,从而在通孔的底部形成切口。 本发明的重要步骤是消除通过使IMD层的表面氮化而实现的这个缺口。 执行湿式聚合物清洁以除去氮化的IMD表面并消除凹口。 粘合层适用于衬套通孔。 然后沉积第二导电层并且将表面平坦化。
    • 24. 发明授权
    • Multiple etch method for forming residue free patterned hard mask layer
    • 用于形成无残留的图案化硬掩模层的多次蚀刻方法
    • US06277752B1
    • 2001-08-21
    • US09342040
    • 1999-06-28
    • Chao-Cheng Chen
    • Chao-Cheng Chen
    • H01L21302
    • H01L21/76224H01L21/3081
    • A method for forming a patterned hard mask layer. There is first provided a substrate. There is then formed over the substrate a blanket hard mask layer formed of a hard mask material susceptible to etching within a first plasma etch method, where the first plasma etch method employs a first etchant gas composition which upon plasma activation forms an active fluorine containing etchant species. There is then formed over the blanket hard mask layer a patterned photoresist layer. There is then etched, while employing the first plasma etch method in conjunction with the patterned photoresist layer as a first etch mask layer, the blanket hard mask layer to form a patterned hard mask layer which defines a first aperture. The first plasma etch method also forms at the bottom of the first aperture defined by the patterned hard mask layer a residue. Finally, there is then etched, while employing a second etch method, the residue from the bottom of the first aperture. The patterned hard mask layer may then be employed for forming within a microelectronic layer, such as a semiconductor substrate, formed beneath the microelectronic layer, an aperture, such as an isolation trench, while employing a third plasma etch method. There may then be formed within the aperture a planarized aperture fill layer, such as a planarized trench isolation region, with enhanced planarity.
    • 一种形成图案化硬掩模层的方法。 首先提供基板。 然后在衬底上形成由在第一等离子体蚀刻方法中容易蚀刻的硬掩模材料形成的橡皮布硬掩模层,其中第一等离子体蚀刻方法采用第一蚀刻剂气体组合物,其在等离子体激活时形成活性含氟蚀刻剂 种类。 然后在橡皮布硬掩模层上形成图案化的光致抗蚀剂层。 然后蚀刻,同时采用第一等离子体蚀刻方法结合图案化的光致抗蚀剂层作为第一蚀刻掩模层,橡皮布硬掩模层以形成限定第一孔的图案化硬掩模层。 第一等离子体蚀刻方法也形成在由图案化的硬掩模层限定的第一孔的底部残留物处。 最后,然后在使用第二蚀刻方法的同时蚀刻来自第一孔径底部的残留物。 然后可以使用图案化的硬掩模层,在采用第三等离子体蚀刻方法的同时,在微电子层(例如形成在微电子层下方的半导体衬底),孔(例如隔离沟槽)之间形成。 然后可以在孔内形成具有增强的平面度的平坦化孔填充层,例如平坦化的沟槽隔离区域。