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    • 2. 发明授权
    • Method for improvement of tungsten chemical-mechanical polishing process
    • 钨化学机械抛光工艺的改进方法
    • US06287172B1
    • 2001-09-11
    • US09465700
    • 1999-12-17
    • Tong-Hua KuanHui-Ling WangYing-Lang WangChin-Kun Lan
    • Tong-Hua KuanHui-Ling WangYing-Lang WangChin-Kun Lan
    • B24B100
    • B24B37/345B24B37/0056B24B37/042B24D13/142
    • A multi-step chemical-mechanical polishing method for improving tungsten chemical-mechanical polishing (CMP) process is provided in the present invention. The method comprises following steps. First, a wafer is placed on a first pad of a CMP system, wherein a head fixes the wafer on the first pad. Then, the head is rotated and the wafer is polished on the first pad by using a tungsten slurry. Next, the wafer is transferred to place on a second pad of the CMP system, wherein the head fixes the wafer on the second pad. Following, the head is rotated and the wafer is polished on the second pad by using the tungsten slurry. Then, the wafer is cleaned on the second pad by using a de-ionic water. Next, the wafer is transferred to place on a third pad of the CMP system, wherein the head fixes the wafer on the third pad. Following, the wafer is cleaned on the third pad by using the de-ionic water. Last, the head is rotated and the wafer is polished on the third pad by using an oxide slurry, wherein a pH value of the tungsten slurry and a pH value of the oxide slurry are opposite.
    • 本发明提供了一种用于改善钨化学机械抛光(CMP)工艺的多步化学机械抛光方法。 该方法包括以下步骤。 首先,将晶片放置在CMP系统的第一焊盘上,其中头部将晶片固定在第一焊盘上。 然后,头部旋转,并且通过使用钨浆料在第一焊盘上抛光晶片。 接下来,将晶片转移到CMP系统的第二焊盘上,其中头部将晶片固定在第二焊盘上。 接下来,头部旋转,并且通过使用钨浆料在第二垫上抛光晶片。 然后,通过使用脱离子水在第二焊盘上清洁晶片。 接下来,将晶片转移到CMP系统的第三焊盘上,其中头部将晶片固定在第三焊盘上。 接下来,通过使用去离子水在第三垫上清洁晶片。 最后,旋转头部,通过使用氧化物浆料在第三焊盘上抛光晶片,其中钨浆料的pH值和氧化物浆料的pH值相反。
    • 3. 发明授权
    • Use of a capping layer to reduce particle evolution during sputter pre-clean procedures
    • 在溅射预清洁过程中使用覆盖层来减少颗粒的发生
    • US06531382B1
    • 2003-03-11
    • US10140662
    • 2002-05-08
    • Tao ChengWen-Hsin HuangJiun-Pyng YouLin-June WuShih-Tzung ChangMing-Jei LeeChun-Chang ChenYu-Ku LinTong-Hua KuanYing-Lang Wang
    • Tao ChengWen-Hsin HuangJiun-Pyng YouLin-June WuShih-Tzung ChangMing-Jei LeeChun-Chang ChenYu-Ku LinTong-Hua KuanYing-Lang Wang
    • H01L213205
    • H01L21/76802H01L21/76838
    • A process for preparing a surface of a lower level metal structure, exposed at the bottom of a sub-micron diameter opening, to allow a low resistance interface to be obtained when overlaid with an upper level metal structure, has been developed. A disposable, capping insulator layer is first deposited on the composite insulator layer in which the sub-micron diameter opening will be defined in, to protect underlying components of the composite insulator from a subsequent metal pre-metal procedure. After anisotropically defining the sub-micron diameter opening in the capping insulator, and composite insulator layers, and after removal of the defining photoresist shape, an argon sputtering procedure is used to remove native oxide from the surface of the lower level metal structure. In addition to native oxide removal the argon sputtering procedure, featuring a negative DC bias applied to the substrate, also removes the capping insulator layer from the top surface of the composite insulator layer. An in situ metal deposition then allows a clean interface to result between the overlying metal layer, and the underlying plasma treated, metal surface.
    • 已经开发了制备在亚微米直径开口的底部露出的下层金属结构的表面以允许在与上层金属结构重叠时获得低电阻界面的方法。 首先将一次性封盖绝缘体层沉积在复合绝缘体层上,在该复合绝缘层上将限定亚微米直径的开口,以保护复合绝缘子的下面的部件免于后续的金属预金属工艺。 在各向异性地限定封盖绝缘体中的亚微米直径开口和复合绝缘体层之后,并且在去除限定的光致抗蚀剂形状之后,使用氩溅射方法从下层金属结构的表面去除自然氧化物。 除了自然氧化物除去之外,具有施加到衬底的负DC偏压的氩溅射工艺也从复合绝缘体层的顶表面去除封盖绝缘体层。 原位金属沉积然后允许在上覆的金属层和下面的等离子体处理的金属表面之间产生干净的界面。
    • 6. 发明授权
    • Methods to improve copper-fluorinated silica glass interconnects
    • 改善铜氟化石英玻璃互连的方法
    • US6136680A
    • 2000-10-24
    • US489498
    • 2000-01-21
    • Jane-Bai LaiChung-Shi LiuTien-I BaoSyun-Ming JangChung-Long ChangHui-Ling WangSzu-An WuWen-Kung ChengChun-Ching TsanYing-Lang Wang
    • Jane-Bai LaiChung-Shi LiuTien-I BaoSyun-Ming JangChung-Long ChangHui-Ling WangSzu-An WuWen-Kung ChengChun-Ching TsanYing-Lang Wang
    • H01L21/02H01L21/3105H01L21/321H01L21/768H01L21/44H01L21/4763
    • H01L21/76825H01L21/02074H01L21/3105H01L21/3212H01L21/76826H01L21/76834H01L21/7684H01L21/76883
    • A method of forming an interconnect, comprising the following steps. A semiconductor structure is provided that has an exposed first metal contact and a dielectric layer formed thereover. An FSG layer having a predetermined thickness is then formed over the dielectric layer. A trench, having a predetermined width, is formed within the FSG layer and the dielectric layer exposing the first metal contact. A barrier layer, having a predetermined thickness, may be formed over the FSG layer and lining the trench side walls and bottom. A metal, preferably copper, is then deposited on the barrier layer to form a copper layer, having a predetermined thickness, over said barrier layer covered FSG layer, filling the lined trench and blanket filling the barrier layer covered FSG layer. The copper layer, and the barrier layer on said upper surface of said FSG layer, are planarized, exposing the upper surface of the FSG layer and forming a planarized copper filled trench. The FSG layer and planarized copper filled trench are then processed by either: (1) annealing from about 400 to 450.degree. C. for about one hour, then either NH.sub.3 or H.sub.2 plasma treating; or (2) Ar.sup.+ sputtering to ion implant Ar.sup.+ to a depth of less than about 300 .ANG. in the fluorinated silica glass layer, whereby any formed Si--OH bonds and copper oxide (metal oxide) are removed. A dielectric cap layer, having a predetermined thickness, is then formed over the processed FSG layer and the planarized copper filled trench.
    • 一种形成互连的方法,包括以下步骤。 提供一种半导体结构,其具有暴露的第一金属触点和形成在其上的电介质层。 然后在电介质层上形成具有预定厚度的FSG层。 具有预定宽度的沟槽形成在FSG层内,并且介电层露出第一金属接触。 具有预定厚度的阻挡层可以形成在FSG层之上并且衬在沟槽侧壁和底部。 然后将一种金属,优选铜沉积在阻挡层上,以形成具有预定厚度的铜层,超过所述阻挡层覆盖的FSG层,填充衬里的沟槽和覆盖填充阻挡层覆盖的FSG层的毯子。 所述FSG层的所述上表面上的铜层和阻挡层被平坦化,暴露出FSG层的上表面并形成平坦化的铜填充沟槽。 然后通过以下步骤之一处理FSG层和平坦化的铜填充沟槽:(1)从约400至450℃的退火约1小时,然后进行NH 3或H 2等离子体处理; 或者(2)在氟化石英玻璃层中,离子注入Ar +溅射至小于约300的深度,由此除去任何形成的Si-OH键和氧化铜(金属氧化物)。 然后在经处理的FSG层和平坦化的铜填充沟槽上形成具有预定厚度的电介质盖层。