Process for cleaning a semiconductor substrate after chemical-mechanical
polishing
    1.
    发明授权
    Process for cleaning a semiconductor substrate after chemical-mechanical polishing 有权
    化学机械抛光后清洗半导体衬底的工艺

    公开(公告)号:US6099662A

    公开(公告)日:2000-08-08

    申请号:US248726

    申请日:1999-02-11

    摘要: An improved method for removing residual slurry particles and metallic residues from the surface of a semiconductor substrate after chemical-mechanical polishing has been developed. The cleaning method involves sequential spray cleaning solutions of NH.sub.4 OH and H.sub.2 O, NH.sub.4 OH, H.sub.2 O.sub.2 and H.sub.2 O, HF and H.sub.2 O, and HCl, H.sub.2 O.sub.2 and H.sub.2 O. The cleaning sequence is: 1. A pre-soak in a spray solution of NH.sub.4 OH and H.sub.2 O; 2. Spray cleaning in a solution of NH.sub.4 OH, H.sub.2 O.sub.2 and H.sub.2 O; 3. Spray cleaning in a dilute solution of HF and H.sub.2 O; 4. Spray rinsing in DI-water. It is important that slurry particulates first be removed by NH.sub.4 OH, H.sub.2 O.sub.2 and H.sub.2 O, followed by spray cleaning in a dilute solution of HF and H.sub.2 O to remove metallic residues. The spray cleaning method is superior to brush cleaning methods for both oxide-CMP and tungsten-CMP and results in superior removal of slurry particles and metallic residues introduced by the CMP processes. An optional spray cleaning step using a solution of HCl, H.sub.2 O.sub.2 and H.sub.2 O results in further reduction of metallic residue contamination following oxide-CMP. Compared to traditional brush cleaning the new spray cleaning process has a 2.times. improvement in throughput, less consumption of DI water, and low risk of cross-contamination between sequentially cleaned substrates.

    摘要翻译: 已经开发了用于在化学机械抛光之后从半导体衬底的表面除去残余浆料颗粒和金属残留物的改进方法。 清洗方法包括NH 4 OH和H 2 O,NH 4 OH,H 2 O 2和H 2 O,HF和H 2 O以及HCl,H 2 O 2和H 2 O的顺序喷雾清洗溶液。 清洗顺序为:1.在NH4OH和H2O的喷雾溶液中预浸泡; 2.在NH4OH,H2O2和H2O溶液中喷雾清洗; 3.在HF和H2O的稀溶液中喷雾清洗; 4.在DI水中喷淋。 重要的是,首先通过NH 4 OH,H 2 O 2和H 2 O除去浆料颗粒,然后在HF和H 2 O的稀溶液中喷雾清洗以除去金属残余物。 喷雾清洗方法优于氧化物CMP和钨-CMP两者的刷子清洗方法,并且优异地除去由CMP工艺引入的浆料颗粒和金属残留物。 使用HCl,H2O2和H2O溶液的可选喷雾清洗步骤可以进一步降低氧化物CMP后的金属残留污染。 与传统的刷子清洁相比,新的喷雾清洁过程在吞吐量方面有2倍的改善,更少的去离子水消耗,以及顺序清洗的基材之间交叉污染的风险较低。

    Method and system for slurry usage reduction in chemical mechanical polishing
    3.
    发明授权
    Method and system for slurry usage reduction in chemical mechanical polishing 失效
    化学机械抛光中浆料用量减少的方法和系统

    公开(公告)号:US06769959B2

    公开(公告)日:2004-08-03

    申请号:US10050314

    申请日:2002-01-15

    IPC分类号: B24B100

    CPC分类号: B24B37/04 B24B57/02

    摘要: A method and system is disclosed for reducing slurry usage in a chemical mechanical polishing operation utilizing at least one polishing pad thereof. Slurry can be intermittently supplied to a chemical mechanical polishing device. The slurry is generally flushed so that a portion of said slurry is trapped in a plurality of pores of at least one polishing pad associated with said chemical mechanical polishing device, wherein only a minimum amount of said slurry necessary is utilized to perform said chemical mechanical polishing operation, thereby reducing slurry usage and maintaining a consistent level of slurry removal rate performance and a decrease in particle defects thereof. The present invention thus discloses a method and system for intermittently delivering slurry to a chemical mechanical polishing device in a manner that significantly conserves slurry usage.

    摘要翻译: 公开了一种利用其至少一个抛光垫在化学机械抛光操作中减少浆料使用的方法和系统。 浆料可以间歇地供应到化学机械抛光装置。 通常将浆料冲洗,使得所述浆料的一部分被捕获在与所述化学机械抛光装置相关联的至少一个抛光垫的多个孔中,其中仅使用最少量的所需浆料来进行所述化学机械抛光 操作,从而减少浆料的使用并保持一致的浆料去除速率性能水平和其颗粒缺陷的减少。 因此,本发明公开了一种用于以显着节省浆料使用的方式间歇地将浆料输送到化学机械抛光装置的方法和系统。

    Obtaining the better defect performance of the fuse CMP process by adding slurry polish on more soft pad after slurry polish
    4.
    发明授权
    Obtaining the better defect performance of the fuse CMP process by adding slurry polish on more soft pad after slurry polish 有权
    通过在浆液抛光后在更软的垫上添加浆料抛光,获得熔融CMP工艺的更好的缺陷性能

    公开(公告)号:US06248002B1

    公开(公告)日:2001-06-19

    申请号:US09421509

    申请日:1999-10-20

    IPC分类号: B24B100

    CPC分类号: B24B37/042

    摘要: A method to prevent the accumulation of particle impurities on the surface of a semiconductor substrate that contains wolfram plugs during the process of polishing the surface of the wafer. The polishing sequence consists of three distinct polishing steps whereby the first two steps use hard polishing pads while the third step uses a soft polishing pad with the application of slurry during the third polish.

    摘要翻译: 一种在抛光晶片表面的过程中防止颗粒杂质在含有钨骨塞的半导体衬底表面积聚的方法。 抛光顺序由三个不同的抛光步骤组成,其中前两个步骤使用硬抛光垫,而第三步在第三次抛光期间使用软抛光垫施加浆料。

    Test device and method for laser alignment calibration
    7.
    发明申请
    Test device and method for laser alignment calibration 有权
    用于激光对准校准的测试装置和方法

    公开(公告)号:US20060055928A1

    公开(公告)日:2006-03-16

    申请号:US10942554

    申请日:2004-09-15

    IPC分类号: G01B11/00

    CPC分类号: H01L22/34 G01B21/042

    摘要: A novel test device and method for calibrating the alignment of a laser beam emitted from a laser metrology tool with respect to a target area on a substrate. The test device includes a laser-sensitive material having a calibration pattern that includes a target point. When the tool is properly adjusted, the laser beam strikes the target point and is released to production. If the laser beam misses the target point, the tool is re-adjusted and re-tested until the laser beam strikes the target point.

    摘要翻译: 一种用于校准从激光计量工具发射的激光束相对于衬底上的目标区域的对准的新型测试装置和方法。 测试装置包括具有包括目标点的校准图案的激光敏感材料。 当工具被正确调整时,激光束撞击目标点并释放到生产中。 如果激光束错过目标点,则重新调整工具并重新测试直到激光束撞击目标点。

    Rule to determine CMP polish time
    9.
    发明授权
    Rule to determine CMP polish time 有权
    确定CMP抛光时间的规则

    公开(公告)号:US06232043B1

    公开(公告)日:2001-05-15

    申请号:US09318471

    申请日:1999-05-25

    IPC分类号: G03F700

    摘要: A simple method for calculating the optimum amount of HDP deposited material that needs to be removed during CMP (without introducing dishing) is described. This method derives from our observation of a linear relationship between the amount of material that needs to be removed in order to achieve full planarization and a quantity called “OD for CMP density”. The latter is defined as PA×(100−PS) where PA is the percentage of active area relative to the total wafer area and PS is the percentage of sub-areas relative to the total wafer area. The sub-areas are regions in the dielectric, above the active areas, that are etched out prior to CMP. Thus, once the materials have been characterized, the optimum CMP removal thickness is readily calculated for a wide range of different circuit implementations.

    摘要翻译: 描述了一种用于计算在CMP期间需要去除的HDP沉积材料的最佳量的简单方法(不引入凹陷)。 该方法来源于我们观察到需要去除的材料的量之间的线性关系以实现完全平坦化,并且称为“用于CMP密度的OD”。 后者被定义为PAx(100-PS),其中PA是相对于总晶片面积的有效面积的百分比,PS是相对于总晶片面积的子区域的百分比。 子区域是在CMP之前被蚀刻出的有源区域之上的电介质区域。 因此,一旦材料被表征,就可以很容易地计算各种不同电路实现的最佳CMP去除厚度。

    Sensing product and method of making
    10.
    发明授权
    Sensing product and method of making 有权
    感知产品和制作方法

    公开(公告)号:US09419155B2

    公开(公告)日:2016-08-16

    申请号:US13343922

    申请日:2012-01-05

    摘要: This description relates to a sensing product formed using a substrate with a plurality of epi-layers. At least a first epi-layer has a different composition than the composition of a second epi-layer. The sensing product optionally includes at least one radiation sensing element in the second epi-layer and optionally an interconnect structure over the second epi-layer. The sensing product is formed by removing the substrate and all epi-layers other than the second epi-layer. A light incident surface of the second epi-layer has a total thickness variation of less than about 0.15 μm.

    摘要翻译: 该描述涉及使用具有多个外延层的基板形成的感测产品。 至少第一外延层具有与第二外延层的组成不同的组成。 感测产品可选地包括第二外延层中的至少一个辐射感测元件以及可选地在第二外延层上的互连结构。 通过去除衬底和除第二外延层之外的所有外延层形成传感产物。 第二外延层的光入射表面具有小于约0.15μm的总厚度变化。