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    • 1. 发明申请
    • UNIFORM DRY ETCH IN TWO STAGES
    • 在两个阶段统一烘干
    • WO2012106033A3
    • 2012-11-29
    • PCT/US2011064724
    • 2011-12-13
    • APPLIED MATERIALS INCYANG DONGQINGTANG JINGINGLE NITIN
    • YANG DONGQINGTANG JINGINGLE NITIN
    • H01L21/3065
    • H01L21/31116
    • A method of etching silicon oxide from a multiple trenches is described which allows more homogeneous etch rates among trenches. The surfaces of the etched silicon oxide within the trench following the etch may also be smoother. The method includes two dry etch stages followed by a sublimation step. The first dry etch stage removes silicon oxide quickly and produces large solid residue granules. The second dry etch stage remove silicon oxide slowly and produces small solid residue granules in amongst the large solid residue granules. Both the small and large solid residue are removed in the ensuing sublimation step. There is no sublimation step between the two dry etch stages.
    • 描述了从多个沟槽蚀刻氧化硅的方法,其允许在沟槽之间更均匀的蚀刻速率。 蚀刻后的沟槽内的蚀刻氧化硅的表面也可以更光滑。 该方法包括两个干蚀刻阶段,接着是升华步骤。 第一道干法刻蚀阶段迅速除去氧化硅,并产生大量的固体残渣颗粒。 第二干蚀刻阶段慢慢地除去氧化硅并且在大的固体残余颗粒中产生小的固体残余颗粒。 在随后的升华步骤中,小的和大的固体残余物都被除去。 两个干法蚀刻阶段之间没有升华步骤。
    • 5. 发明申请
    • IMPROVED INTRENCH PROFILE
    • 改进的英语资料
    • WO2013049173A3
    • 2013-06-13
    • PCT/US2012057294
    • 2012-09-26
    • APPLIED MATERIALS INCSAPRE KEDARINGLE NITIN KTANG JING
    • SAPRE KEDARINGLE NITIN KTANG JING
    • H01L21/762H01L21/205H01L21/31
    • H01L21/3065H01L21/3081H01L21/76224
    • A method of etching a recess in a semiconductor substrate is described. The method may include forming a dielectric liner layer in a trench of the substrate where the liner layer has a first density. The method may also include depositing a second dielectric layer at least partially in the trench on the liner layer. The second dielectric layer may initially be flowable following the deposition, and have a second density that is less than the first density of the liner. The method may further include exposing the substrate to a dry etchant, where the etchant removes a portion of the first liner layer and the second dielectric layer to form a recess, where the dry etchant includes a fluorine-containing compound and molecular hydrogen, and where the etch rate ratio for removing the first dielectric liner layer to removing the second dielectric layer is about 1:1.2 to about 1:1.
    • 描述了蚀刻半导体衬底中的凹陷的方法。 该方法可以包括在衬底的具有第一密度的衬底的沟槽中形成电介质衬里层。 该方法还可以包括至少部分地在衬垫层上的沟槽中沉积第二介电层。 第二介电层在沉积之后最初可以是可流动的,并且具有小于衬里的第一密度的第二密度。 该方法可进一步包括将衬底暴露于干蚀刻剂,其中蚀刻剂去除第一衬层和第二介电层的一部分以形成凹槽,其中干蚀刻剂包括含氟化合物和分子氢,并且其中 用于去除第一电介质衬垫层以去除第二电介质层的蚀刻速率比为约1:1.2至约1:1。