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    • 4. 发明授权
    • Forming wide dielectric-filled isolation trenches in semi-conductors
    • 在半导体中形成宽电介质填充的隔离沟槽
    • US5173439A
    • 1992-12-22
    • US679568
    • 1991-04-02
    • Somanath DashMichael L. KerbaughCharles W. Koburger, IIIBrian J. MachesneyNitin B. Parekh
    • Somanath DashMichael L. KerbaughCharles W. Koburger, IIIBrian J. MachesneyNitin B. Parekh
    • H01L21/3105H01L21/311H01L21/762
    • H01L21/02063H01L21/3105H01L21/31053H01L21/31116H01L21/76229
    • A method of forming a planarized dielectric filled wide shallow trench in a semi-conductor substrate is provided. A layer of etch stop such as Si.sub.3 N.sub.4 is deposited onto the semi-conductor substrate, and wide trenches are formed through the Si.sub.3 N.sub.4 into the substrate by conventional RIE. The surface of the substrate including the trenches have formed thereon a SiO.sub.2 coating, conforming to the surface of the substrate. A layer of etch resistant material such as polysilicon is deposited onto the SiO.sub.2 material. The polysilicon outside the width of the trenches is then removed by chemical-mechanical polishing to expose the SiO.sub.2 there below, while leaving the SiO.sub.2 above the trenches covered with polysilicon. The exposed SiO.sub.2 is then RIE etched down to the Si.sub.3 N.sub.4, leaving a plug of SiO.sub.2 capped with the etch resistant polysilicon over each trench. These plugs are then removed by mechanical polishing down to the Si.sub.3 N.sub.4, to provide a planarized upper surface of SiO.sub.2 and Si.sub.3 N.sub.4 on the top of the substrate. The invention also is useful in forming planarized surfaces on substrates having trenches filled with conductive material.
    • 提供了一种在半导体衬底中形成平坦化介质填充的宽浅沟槽的方法。 将诸如Si 3 N 4的蚀刻停止层沉积到半导体衬底上,并且通过常规RIE通过Si 3 N 4形成宽的沟槽进入衬底。 包括沟槽的衬底的表面在其上形成符合衬底表面的SiO 2涂层。 将诸如多晶硅的耐蚀刻材料层沉积到SiO 2材料上。 然后通过化学机械抛光去除沟槽宽度外的多晶硅,以在下面暴露出SiO 2,同时在覆盖有多晶硅的沟槽上留下SiO 2。 然后将暴露的SiO 2 RIE蚀刻到Si 3 N 4上,在每个沟槽上留下带有耐蚀刻多晶硅的SiO 2塞。 然后通过机械抛光除去Si 3 N 4,从而在衬底的顶部提供SiO 2和Si 3 N 4的平坦化上表面。 本发明还可用于在具有填充有导电材料的沟槽的衬底上形成平坦化表面。
    • 6. 发明授权
    • Device and method for detecting an end point in polishing operation
    • 用于检测抛光操作中的终点的装置和方法
    • US5213655A
    • 1993-05-25
    • US844439
    • 1992-03-02
    • Michael A. LeachBrian J. MachesneyEdward J. Nowak
    • Michael A. LeachBrian J. MachesneyEdward J. Nowak
    • B24B37/013H01L21/302
    • B24B37/013G01B7/10G01B7/105
    • The present invention relates to a method and apparatus for remotely detecting impedance. It is specifically adapted for use on a polishing machine wherein the end point of polishing for removing a surface layer during the processing of semiconductor substrates is detected. A first, or stationary coil having a high permeability core is wound having an air gap and an AC voltage is applied to the stationary coil to provide a magnetic flux in the air gap. A second coil is mounted for rotation on the polishing table, in a position to periodically pass through the air gap of the stationary coil as the table rotates. The second coil is connected at its opposite ends to contacts which are embedded in the surface of the polishing wheel. The contacts are positioned to engage the surface of the substrate which is being polished and provide a load on the second or rotating coil. The rotating coil, when it is in the air gap of the stationary coil, will perturb the flux field therein as a function of the resistance of the load caused by the contacts contacting either a conducting surface or a non-conducting surface. This perturbance of the flux field is measured as a change in the induced voltage in the stationary coil which in turn is converted to a signal which is processed to indicate the end point of polishing, the end point being when a metallic layer has been removed to expose a dielectric layer therebeneath or, conversely, when a dielectric layer has been removed to expose a metallic layer therebeneath.
    • 本发明涉及用于远程检测阻抗的方法和装置。 它特别适用于抛光机,其中检测在半导体衬底的处理期间用于去除表面层的抛光终点。 具有高磁导率芯的第一或固定线圈缠绕有气隙并且将AC电压施加到固定线圈以在气隙中提供磁通量。 第二线圈安装成在研磨台上旋转,以便在桌子旋转时周期性地通过固定线圈的气隙的位置。 第二线圈在其相对端连接到嵌入抛光轮表面的触点。 触点定位成接合被抛光的基板的表面,并在第二或旋转的线圈上提供负载。 当旋转线圈处于固定线圈的空气隙中时,其将作为由触点接触任何导电表面或不导电表面引起的负载的电阻的函数扰乱其中的磁通场。 测量磁通场的扰动是作为固定线圈中的感应电压的变化而被测量的,该感应电压又被转换成被处理以指示抛光的终点的信号,终点是当金属层被去除时的终点 在其下面露出介电层,或者相反地,当电介质层被去除以暴露其下面的金属层时。
    • 9. 发明授权
    • Device for detecting an end point in polishing operations
    • 用于检测抛光操作中的终点的装置
    • US5242524A
    • 1993-09-07
    • US12056
    • 1993-02-01
    • Michael A. LeachBrian J. MachesneyEdward J. Nowak
    • Michael A. LeachBrian J. MachesneyEdward J. Nowak
    • B24B37/013H01L21/302
    • B24B37/013G01B7/10G01B7/105
    • The present invention relates to an apparatus for remotely detecting impedance adapted for use on a polishing machine wherein the end point of polishing for removing a surface layer during the processing of semiconductor substrates is detected. A first stationary coil having a high permeability core is wound having an air gap and an AC voltage is applied to the stationary coil to provide a magnetic flux in the air gap. A second coil is mounted for rotation on the polishing table, in a position to periodically pass through the air gap of the stationary coil as the table rotates. The second coil is connected at its opposite ends to contacts which are embedded in the surface of the polishing wheel. The contacts are positioned to engage the surface of the substrate being polished and provide a load on the second rotating coil when it is in the air gap of the stationary coil, will perturb the flux field therein as a function of the resistance of the load caused by the contacts contacting either a conducting surface or a non-conducting surface. This perturbance of the flux field is measured as a change in the induced voltage in the stationary coil which is converted to a signal processed to indicate the end point of polishing, the end point being when a metallic layer has been removed to expose a dielectric layer or when a dielectric layer has been removed to expose a metallic layer.
    • 本发明涉及一种用于远程检测适用于抛光机器的阻抗的装置,其中检测在半导体衬底的处理期间用于去除表面层的抛光终点。 具有高磁导率芯的第一固定线圈缠绕有气隙并且将AC电压施加到固定线圈以在气隙中提供磁通量。 第二线圈安装成在研磨台上旋转,以便在桌子旋转时周期性地通过固定线圈的气隙的位置。 第二线圈在其相对端连接到嵌入抛光轮表面的触点。 接触件被定位成接合正被抛光的基板的表面,并且当其处于固定线圈的气隙中时,在第二旋转线圈上提供负载将根据负载的电阻而扰乱其中的磁通场 通过触点接触导电表面或非导电表面。 磁通场的这种扰动被测量为固定线圈中的感应电压的变化,其被转换为处理以指示抛光的终点的信号,终点是当金属层被去除以暴露电介质层 或者当电介质层被去除以暴露金属层时。