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    • 43. 发明授权
    • Method for forming isolation layer of semiconductor device
    • 形成半导体器件隔离层的方法
    • US07033907B2
    • 2006-04-25
    • US10878451
    • 2004-06-28
    • Jung Geun Kim
    • Jung Geun Kim
    • H01L21/302
    • H01L21/76229
    • A method for forming an isolation layer of a semiconductor device is disclosed, which comprises the steps of: etching a silicon substrate having a cell region and a peripheral circuit region, forming a first trench having a first size in the cell region, and forming a second trench having a second size, which is larger than the first size of the first trench, in the peripheral circuit region; forming a sidewall oxide layer on surfaces of the first trench and the second trench; sequentially depositing a liner nitride layer and a liner oxide layer on a resultant substrate inclusive of the sidewall oxide layer; performing a plasma pre-heating process using O2+He with respect to the resultant substrate in an HDP CVD process chamber and selectively oxidizing a portion of the liner nitride layer remaining on a bottom of the second trench in the peripheral circuit region; continuously depositing an HDP oxide layer on the resultant substrate having been subjected to the plasma pre-heating process, thereby filling the trenches; and performing a chemical mechanical polishing process with respect to the HDP oxide layer.
    • 公开了一种用于形成半导体器件的隔离层的方法,其包括以下步骤:蚀刻具有单元区域和外围电路区域的硅衬底,在单元区域中形成具有第一尺寸的第一沟槽,并形成 在外围电路区域中具有大于第一沟槽的第一尺寸的第二尺寸的第二沟槽; 在所述第一沟槽和所述第二沟槽的表面上形成侧壁氧化物层; 在包括侧壁氧化物层的所得衬底上依次沉积衬里氮化物层和衬垫氧化物层; 在HDP CVD处理室中使用O 2 H 2 He对所得衬底进行等离子体预热处理,并且选择性地氧化残留在第二沟槽的底部上的衬里氮化物层的一部分 外围电路区域; 在经过等离子体预热处理的所得基板上连续沉积HDP氧化物层,从而填充沟槽; 对HDP氧化物层进行化学机械研磨处理。