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    • 2. 发明公开
    • BPSG막과 SOD막을 포함하는 기판의 에칭액
    • 用于具有BPSG和SOD层的基板的捕获
    • KR1020080011229A
    • 2008-01-31
    • KR1020077029067
    • 2006-05-24
    • 다이킨 고교 가부시키가이샤
    • 이타노미츠시와타나베다이스케
    • H01L21/306H01L21/768H01L21/3063
    • H01L21/31111
    • An etchant for etching the non-annealed BPSG (boron phosphosilicate glass) layer and THOX (thermal oxide) layer of a nanodevice produced by low-temperature process or the non-annealed SOD (Spin on Dielectric) layer and THOX layer thereof at equivalent rates or nearly equivalent rates; an etching process; and products of etching. Specifically, an etchant which contains at least one salt selected from among fluoride salts and hydrogendifluoride salts and an organic solvent having a heteroatom and which exhibits etching rates of 100Å/min or below at 23°C against THOX layer, non-annealed BPSG layer, and non-annealed SOD layer and etching rate ratios of non-annealed BPSG layer and non-annealed SOD layer to THOX layer of 3 or below.
    • 蚀刻用于蚀刻通过低温工艺或非退火的SOD(电介质)上的非退火的BPSG(硼磷硅酸盐玻璃)层和THOX(热氧化物)层,其等效速率 或几乎相当的税率; 蚀刻工艺; 和蚀刻产品。 具体地说,含有至少一种选自氟化物盐和二氢
      化甘油醚的盐的蚀刻剂和具有杂原子的有机溶剂,并且在23℃下相对于THOX层,未退火的BPSG层表现出100 / min或更低的腐蚀速率, 和未退火的SOD层和未退火的BPSG层和未退火的SOD层与THOX层的蚀刻速率比为3或更低。