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    • 7. 发明申请
    • Low temperature method for minimizing copper hillock defects
    • 用于最小化铜小丘缺陷的低温方法
    • US20060252258A1
    • 2006-11-09
    • US11122393
    • 2005-05-05
    • Jun WuWen-Long LeeChyi-Tsong NiShih-Chi Lin
    • Jun WuWen-Long LeeChyi-Tsong NiShih-Chi Lin
    • H01L21/4763H01L21/44
    • H01L21/76877H01L21/76801H01L21/76883
    • A method of fabricating a copper interconnect on a substrate is disclosed in which the interconnect and substrate are subjected to a low temperature anneal subsequent to polarization of the interconnect and prior to deposition of an overlying dielectric layer. The low temperature anneal inhibits the formation of hillocks in the copper material during subsequent high temperature deposition of the dielectric layer. Hillocks can protrude through passivation layer, thus causing shorts within the connections of the semiconductor devices formed on the substrate. In one example, the interconnect and substrate are annealed at a temperature of about 200 ° C. for a period of about 180 seconds in a forming gas environment comprising hydrogen (5 parts per hundred) and nitrogen (95 parts per hundred).
    • 公开了一种在衬底上制造铜互连的方法,其中互连和衬底在互连的极化之后并且在沉积上覆的电介质层之前经受低温退火。 低温退火在随后的介电层的高温沉积期间抑制铜材料中的小丘的形成。 小丘可以突出穿过钝化层,从而在形成在衬底上的半导体器件的连接之内引起短路。 在一个实例中,在包含氢气(5份/百份)和氮气(95份/百份)的形成气体环境中,在大约200℃的温度下将互连和衬底退火约180秒的时间。