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    • 5. 发明授权
    • Epitaxial wafer and method for producing same
    • 外延晶片及其制造方法
    • US07648576B2
    • 2010-01-19
    • US10596280
    • 2004-12-10
    • Yasuo FukudaMakoto TakemuraKoichi Okuda
    • Yasuo FukudaMakoto TakemuraKoichi Okuda
    • C30B5/00H01L21/311
    • H01L21/02052H01L21/02008H01L21/02381H01L21/02532H01L21/02658H01L21/302Y10S438/905Y10S438/913
    • After cleaning the front and back sides of a silicon wafer with a liquid SC-1 and liquid SC-2, the front and back sides of the silicon wafer are cleaned with an HF solution to be water-repellent surfaces. Following that, an epitaxial layer of silicon is formed on the front side. Consequently, there can be reduced stacking faults after formation of the epitaxial layer and occurrence of cloud on the back side. Alternatively, the front and back sides of a silicon wafer are cleaned with the liquid SC-1 and liquid SC-2, and then the back side of the silicon wafer is cleaned with an HF solution to be a water-repellent surface while the front side is cleaned with purified water to be a hydrophilic surf ace. Following that, an epitaxial layer of silicon is formed on the front side. Consequently, there can be reduced mounds on the front side and occurrence of cloud on the back side.
    • 用液体SC-1和液体SC-2清洗硅晶片的正面和背面后,用HF溶液清洗硅晶片的正面和背面以防水表面。 之后,在正面形成硅外延层。 因此,在形成外延层之后可以减少堆垛层错,并且在背面发生云。 或者,用液体SC-1和液体SC-2清洗硅晶片的正面和背面,然后用HF溶液将硅晶片的背面清洗成防水表面,而前面 侧面用净化水清洗成亲水冲浪。 之后,在正面形成硅外延层。 因此,前侧可能有减少的土堆和背面出现云。
    • 10. 发明授权
    • Manufacturing method for epitaxial wafer
    • 外延晶圆的制造方法
    • US07960254B2
    • 2011-06-14
    • US12645744
    • 2009-12-23
    • Naoyuki WadaMakoto Takemura
    • Naoyuki WadaMakoto Takemura
    • H01L21/20C23C16/00
    • H01L21/68742C23C16/4411C23C16/481C23C24/082H01L21/02532H01L21/02579
    • To provide a manufacturing method for an epitaxial wafer that alleviates distortions on a back surface thereof due to sticking between a wafer and a susceptor, thereby preventing decrease in flatness thereof due to a lift pin. A manufacturing method for an epitaxial wafer according to the present invention includes: an oxide film forming step in which an oxide film is formed on a back surface thereof; an etching step in which a hydrophobic portion exposing a back surface of the semiconductor wafer is provided by partially removing the oxide film; a wafer placing step in which the semiconductor wafer is placed; and an epitaxial growth step in which an epitaxial layer is grown on a main surface of the semiconductor wafer; and the diameter of the lift pin installation circle provided on a circle on a bottom face of a susceptor is smaller than that of the hydrophobic portion.
    • 为了提供一种外延晶片的制造方法,其能够缓和由于晶片和基座之间的粘附而引起的背面的变形,从而防止由于升降销引起的平坦度的降低。 根据本发明的外延晶片的制造方法包括:在其背面形成有氧化膜的氧化膜形成工序; 通过部分去除氧化膜来提供暴露半导体晶片的背面的疏水部分的蚀刻步骤; 放置半导体晶片的晶片放置步骤; 以及在半导体晶片的主表面上生长外延层的外延生长步骤; 并且设置在基座的底面上的圆上的提升销安装圈的直径小于疏水部分的直径。