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    • 48. 发明授权
    • High capacitance density vertical natural capacitors
    • 高电容密度垂直天然电容
    • US07466534B2
    • 2008-12-16
    • US11422457
    • 2006-06-06
    • Anil K. Chinthakindi
    • Anil K. Chinthakindi
    • H01G4/228H01L27/108H01L29/94
    • H01G4/228H01G4/30H01G4/33H01L23/5223H01L28/60H01L2924/0002Y10T29/417Y10T29/435H01L2924/00
    • Disclosed are embodiments of a capacitor with inter-digitated vertical plates and a method of forming the capacitor such that the effective gap distance between plates is reduced. This gap width reduction significantly increases the capacitance density of the capacitor. Gap width reduction is accomplished during back end of the line processing by masking connecting points with nodes, by etching the dielectric material from between the vertical plates and by etching a sacrificial material from below the vertical plates. Etching of the dielectric material from between the plates forms air gaps and various techniques can be used to cause the plates to collapse in on these air gaps, once the sacrificial material is removed. Any remaining air gaps can be filled by depositing a second dielectric material (e.g., a high k dielectric), which will further increase the capacitance density and will encapsulate the capacitor in order to make the reduced distance between the vertical plates permanent.
    • 公开了具有数字化的垂直板的电容器的实施例以及形成电容器的方法,使得板之间的有效间隙距离减小。 该间隙宽度减小显着增加了电容器的电容密度。 通过用节点掩蔽连接点,通过从垂直板之间蚀刻电介质材料,并通过从垂直板下方蚀刻牺牲材料,在线加工的后端完成间隙宽度减小。 一旦牺牲材料被去除,介质材料之间的介电材料的蚀刻形成气隙,并且可以使用各种技术来使板在这些气隙上塌陷。 可以通过沉积第二电介质材料(例如,高k电介质)来填充任何剩余的空气间隙,这将进一步增加电容密度并将封装电容器,以便使垂直板之间的距离减小。