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    • 1. 发明授权
    • Process of making unlanded vias
    • 制作无人化过孔的过程
    • US5976984A
    • 1999-11-02
    • US1416
    • 1997-12-30
    • Coming ChenChih-Chien LiuKun-Chih WangTri-Rung Yew
    • Coming ChenChih-Chien LiuKun-Chih WangTri-Rung Yew
    • H01L21/768H01L23/522H01L21/02
    • H01L23/5226H01L21/76802H01L21/76829H01L2924/0002
    • A method of making vias in a semiconductor IC device having adequate contact to the surface of the interconnects and without inadequate landing is disclosed. The method has interconnects formed in a metal layer on the substrate of the IC device, and a first dielectric layer is formed covering the surface of the interconnects. An etch-stopping layer is then formed on top of the first dielectric layer, followed by the formation of a second dielectric layer on top of the etch-stopping layer. A photoresist layer then covers the second dielectric layer and reveals the surface regions of the second dielectric layer designated for the formation of the vias. A main etching procedure is then performed to etch into the second dielectric layer down to the surface of the etch-stopping layer, thereby forming the first section of the vias. An over-etching procedure is then implemented to strip off the etch-stopping layer and further etches into the first dielectric layer and the etching is then stopped when the surface of the interconnects are revealed to conclude the formation of the vias.
    • 公开了一种在半导体IC器件中形成通孔的方法,该半导体IC器件具有与互连表面的充分接触并且没有不足够的着陆。 该方法具有形成在IC器件的衬底上的金属层中的互连,并且覆盖互连表面的第一介电层被形成。 然后在第一介电层的顶部上形成蚀刻停止层,随后在蚀刻停止层的顶部形成第二电介质层。 光致抗蚀剂层然后覆盖第二电介质层并且显露指定用于形成通孔的第二电介质层的表面区域。 然后执行主蚀刻程序以蚀刻到第二介电层中,直到蚀刻停止层的表面,从而形成通孔的第一部分。 然后实施过蚀刻程序以剥离蚀刻停止层并进一步蚀刻到第一介电层中,然后当显露互连表面以终止形成通孔时,停止蚀刻。
    • 5. 发明授权
    • Via structure and method of manufacture
    • 通过结构和制造方法
    • US6080660A
    • 2000-06-27
    • US32682
    • 1998-02-27
    • Kun-Chih WangHsiao-Pang ChouWen-Yi HsiehTri-Rung Yew
    • Kun-Chih WangHsiao-Pang ChouWen-Yi HsiehTri-Rung Yew
    • H01L21/311H01L21/768H01L21/4763
    • H01L21/31116H01L21/76802H01L21/76805
    • A method for manufacturing a via structure comprising the steps of providing a semiconductor substrate, and then forming conductive line and dielectric layer over the substrate. Next, a photolithographic and a first etching operation are conducted so that an opening in the dielectric layer exposing the conductive line surface is formed. The first etching operation uses several etchants including fluorobutane, which has the highest concentration. Since there is a re-entrance structure at the bottom of the opening, a second etching operation is performed. In the second etching operation, a portion of the conductive line is etched for a fixed time interval to control the degree of etching. Consequently, a slanting surface is formed at the bottom of the opening and the re-entrance structure is eliminated. With a planarized bottom, step coverage of subsequently deposited material is increased.
    • 一种用于制造通孔结构的方法,包括以下步骤:提供半导体衬底,然后在衬底上形成导电线和电介质层。 接下来,进行光刻和第一蚀刻操作,从而形成暴露导电线表面的电介质层中的开口。 第一蚀刻操作使用多种蚀刻剂,包括具有最高浓度的氟代丁烷。 由于在开口的底部存在再入口结构,因此进行第二蚀刻操作。 在第二蚀刻操作中,导电线的一部分被蚀刻固定的时间间隔以控制蚀刻程度。 因此,在开口的底部形成倾斜表面,并且消除了再入口结构。 在平坦化的底部,随后沉积材料的阶梯覆盖率增加。
    • 6. 发明授权
    • Self-aligned via process for preventing poison via formation
    • 通过形成防止毒物的自对准通过过程
    • US6013579A
    • 2000-01-11
    • US176385
    • 1998-10-21
    • Kun-Chih WangTri-Rung Yew
    • Kun-Chih WangTri-Rung Yew
    • H01L21/768H01L21/00
    • H01L21/76829H01L21/76802H01L21/76897
    • A self-aligned via process to prevent the via poisoning includes forming a hydrogen silsesquioxane layer on the substrate and over a pre-formed metal layer, forming an etching stop layer on the hydrogen silsesquioxane layer, forming an oxide layer on the etching stop layer, and then proceeding with a two-step etching process to form a via. The two-step etching process first patterns the oxide layer using a patterned photoresist layer as a mask, and then patterns the etching stop layer together with the hydrogen silsesquioxane layer using the patterned oxide layer as a mask. Because the etching stop layer prevents the hydrogen silsesquioxane layer from reacting with the oxygen plasma during the photoresist layer removal process, via poisoning is eliminated.
    • 用于防止通路中毒的自对准通孔工艺包括在基板上和预成型的金属层上形成氢倍半硅氧烷层,在氢倍半硅氧烷层上形成蚀刻停止层,在蚀刻停止层上形成氧化物层, 然后进行两步蚀刻工艺以形成通孔。 两步蚀刻工艺首先使用图案化的光致抗蚀剂层作为掩模对氧化物层进行图案化,然后使用图案化氧化物层作为掩模,将蚀刻停止层与氢倍半硅氧烷层一起图案化。 因为蚀刻停止层防止在光致抗蚀剂层去除过程中氢倍半硅氧烷层与氧等离子体反应,消除了中毒。