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    • 4. 发明申请
    • METHODS FOR ETCHING AN ALUMINUM-CONTAINING LAYER
    • 用于蚀刻含铝层的方法
    • WO9967443A9
    • 2000-06-08
    • PCT/US9914026
    • 1999-06-22
    • LAM RES CORP
    • O'DONNELL ROBERT J
    • C23F4/00H01L21/302H01L21/3065H01L21/3213
    • H01L21/32136C23F4/00Y10T428/12028Y10T428/12493Y10T428/249954
    • A method for etching selected portions of an aluminum-containing layer of a layer stack that is disposed on a substrate. The aluminum-containing layer is disposed below a photoresist mask having a pattern thereon. The method includes providing a plasma processing chamber and positioning the substrate having thereon the layer stack, including the aluminum containing layer and the photoresist mask, within the plasma processing chamber. The method further includes flowing an etchant source gas that comprises HCl, a chlorine-containing source gas, and an oxygen-containing source gas into the plasma processing chamber. The flow rate of the oxygen-containing source gas is less than about 20 percent of a total flow rate of the etchant source gas. There is also included striking a plasma out of the etchant source gas, wherein the plasma is employed to etch at least partially through the aluminum-containing layer.
    • 一种用于蚀刻设置在基板上的层叠体的含铝层的选定部分的方法。 含铝层设置在其上具有图案的光致抗蚀剂掩模下方。 该方法包括提供等离子体处理室并将其上具有包括铝包层和光刻胶掩模的层堆叠的衬底定位在等离子体处理室内。 该方法还包括将包含HCl,含氯源气体和含氧源气体的蚀刻剂源气体流入等离子体处理室。 含氧源气体的流量小于蚀刻剂源气体的总流量的约20%。 还包括从蚀刻剂源气体中冲出等离子体,其中使用等离子体至少部分地蚀刻通过含铝层。