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    • 2. 发明公开
    • Method of purifying alkaline solution and method of etching semiconductor wafers
    • 纯化碱性溶液的方法和半导体晶片的蚀刻方法
    • EP0761599A3
    • 1999-01-07
    • EP96113770.0
    • 1996-08-28
    • SHIN-ETSU HANDOTAI COMPANY LIMITED
    • Nakano, MasamiUchiyama, IsaoAjito, ToshioKudo, Hideo
    • C01D1/28C23F1/32H01L21/302
    • C01D1/28
    • A method of purifying an alkaline solution includes dissolving metallic silicon and/or silicon compounds in the alkaline solution and non-ionizing metallic ions in the alkaline solution with reaction products generated when the metallic silicon and/or silicon compounds are dissolved therein. This purifying method is capable of remarkably decreasing metallic ions in the alkaline solution at a low-cost by an easy operation. A method of etching semiconductor wafers includes purifying an alkaline solution by non-ionizing metallic ions in the alkaline solution and etching the semiconductor wafers by using the purified alkaline solution. According to this etching method, the metallic contamination level due to the etching of the semiconductor wafers is greatly decreased, there being neither deterioration in the wafer quality nor deterioration in the characteristic of the semiconductor device.
    • 纯化碱性溶液的方法包括将金属硅和/或硅化合物溶解在碱性溶液中,并将碱性溶液中的非电离金属离子与金属硅和/或硅化合物溶解在其中时产生的反应产物一起溶解。 该净化方法能够通过简单的操作以低成本显着减少碱性溶液中的金属离子。 蚀刻半导体晶片的方法包括通过在碱性溶液中非离子化金属离子来纯化碱性溶液,并通过使用纯化的碱性溶液蚀刻半导体晶片。 根据该蚀刻方法,由于半导体晶片的蚀刻导致的金属污染物水平大大降低,晶片质量既不降低也不降低半导体装置的特性。
    • 10. 发明公开
    • Method of polishing semiconductor wafers
    • Verfahren zum Polieren von Halbleiterscheiben
    • EP0788146A1
    • 1997-08-06
    • EP97101488.1
    • 1997-01-30
    • SHIN-ETSU HANDOTAI COMPANY LIMITED
    • Kato, TadahiroMasumura, HisashiNakano, MasamiKudo, Hideo
    • H01L21/304B24B37/04H01L21/306
    • H01L21/02024B24B37/30
    • A method of polishing semiconductor wafers includes a double side primary polishing step and a single side secondary polishing step using a single side polishing machine with a wafer holder including a template so bonded on a carrier plate as having one or more wafer receiving holes in which backing pads are disposed respectively for holding the back sides of the respective wafers fittingly received therein.. This method makes it to possible to hold a plurality of wafers at one time due to batch processing to thereby improve the productivity, and decrease extremely the generation of the defective dimples in the front side of the wafer. Compared with conventional single side polishing, the flatness level of the wafer polished with the double side polishing machine in this method is improved.
    • 抛光半导体晶片的方法包括双面一次抛光步骤和单面二次抛光步骤,其使用单面抛光机,其具有包括模板的晶片保持器,所述模板粘合在载体板上,具有一个或多个晶片接收孔,其中背衬 分别设置衬垫以保持各个晶片的背面合适地容纳在其中。该方法使得可以由于批量处理而一次保持多个晶片,从而提高生产率,并且极大地减少 在晶片正面的缺陷凹坑。 与常规单面抛光相比,该方法中用双面抛光机抛光的晶片的平整度得到改善。