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    • 3. 发明申请
    • PHASE-CHANGE MEMORY DEVICE AND METHOD FOR MANUFACTURING THE SAME
    • 相变存储器件及其制造方法
    • US20090039334A1
    • 2009-02-12
    • US12146184
    • 2008-06-25
    • Su Jin CHAEKeum Bum LEEMin Yong LEE
    • Su Jin CHAEKeum Bum LEEMin Yong LEE
    • H01L45/00H01L21/311
    • H01L45/06H01L27/2409
    • A phase-change memory device and a fabrication method thereof, capable of reducing driving current while minimizing a size of a contact hole used for forming a PN diode in the phase-change memory device that employs the PN diode. The method of fabricating the phase-change memory device includes the steps of preparing a semiconductor substrate having a junction area formed with a dielectric layer, forming an interlayer dielectric layer having etching selectivity lower than that of the dielectric layer over an entire structure, and forming a contact hole by removing predetermined portions of the interlayer dielectric layer and the dielectric layer. The contact area between the PN diode and the semiconductor substrate is increased so that interfacial resistance is reduced.
    • 一种相变存储器件及其制造方法,其能够在使用PN二极管的相变存储器件中最小化用于形成PN二极管的接触孔的尺寸的同时降低驱动电流。 制造相变存储器件的方法包括以下步骤:制备具有与电介质层形成的结区的半导体衬底,在整个结构上形成具有低于电介质层的蚀刻选择性的层间电介质层,以及形成 通过去除层间电介质层和电介质层的预定部分的接触孔。 PN二极管和半导体衬底之间的接触面积增加,从而降低界面电阻。