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    • 51. 发明授权
    • Slurry for use with fixed-abrasive polishing pads in polishing semiconductor device conductive structures that include copper and tungsten and polishing methods
    • 用于抛光半导体器件导电结构(包括铜和钨)和抛光方法的固定研磨抛光垫的浆料
    • US06830500B2
    • 2004-12-14
    • US10132827
    • 2002-04-25
    • Dinesh ChopraNishant Sinha
    • Dinesh ChopraNishant Sinha
    • B24B100
    • B24B37/0056B24B37/04H01L21/3212
    • A method for substantially simultaneously polishing a copper conductive structure of a semiconductor device structure and an adjacent barrier layer includes use of a fixed-abrasive type polishing pad with a substantially abrasive-free slurry in which copper is removed at a rate that is substantially the same as or faster than a rate at which a material, such as tungsten, of the barrier layer is removed. The slurry is formulated so as to oxidize copper at substantially the same rate as or at a faster rate than a material of the barrier layer is oxidized. Thus, copper and the barrier layer material have substantially the same oxidation energies in the slurry or the oxidation energy of the barrier layer material in the slurry may be greater than that of copper. Systems for substantially polishing copper conductive structures and adjacent barrier structures on semiconductor device structures are also disclosed.
    • 用于基本上同时抛光半导体器件结构和相邻阻挡层的铜导电结构的方法包括使用具有基本上无磨料的浆料的固定研磨型抛光垫,其中铜以基本相同的速率被去除 等于或快于去除阻挡层的材料(例如钨)的速率。 将浆料配制成以与阻挡层的材料氧化为基本相同的速率或以更快的速率氧化铜。 因此,铜和阻挡层材料在浆料中具有基本相同的氧化能量,或者浆料中的阻挡层材料的氧化能可能大于铜的氧化能。 还公开了用于在半导体器件结构上基本抛光铜导电结构和相邻阻挡结构的系统。
    • 55. 发明授权
    • Selective CMP scheme
    • 选择性CMP方案
    • US06511906B1
    • 2003-01-28
    • US09943381
    • 2001-08-30
    • Nishant Sinha
    • Nishant Sinha
    • H01L214763
    • H01L21/3212H01L21/7684
    • A semiconductor substrate with a plurality of semiconductor devices formed therein is processed by initially forming a silicon nitride insulating layer over the semiconductor devices. Interconnect holes are formed in the insulating layer. The interconnect holes are filled with a silver-based conductive material so that portions of the silver-based conductive material extend beyond the uppermost boundary of the interconnect holes. The device is then chemically and mechanically planarized with a processing slurry selected to be minimally selective of silicon nitride and relatively highly selective of the silver-based conductive material. The processing slurry comprises an abrasive and an oxidizer. In this manner, the portions of the silver-based conductive material extending beyond said uppermost boundary of the interconnect holes are removed.
    • 通过在半导体器件上初始形成氮化硅绝缘层来处理其中形成有多个半导体器件的半导体衬底。 互连孔形成在绝缘层中。 互连孔填充有银基导电材料,使得银基导电材料的部分延伸超过互连孔的最上边界。 然后将该装置化学和机械平面化,其中选择的处理浆料是氮化硅的最小选择性和相对高选择性的银基导电材料。 处理浆料包括研磨剂和氧化剂。 以这种方式,移除超过互连孔的最上边界的银基导电材料的部分。