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    • 51. 发明授权
    • Method of reducing metal voidings in 0.25 .mu.m AL interconnect
    • 在0.25微米AL互连中减少金属空隙的方法
    • US6143672A
    • 2000-11-07
    • US084442
    • 1998-05-22
    • Minh Van NgoSimon S. ChanSuzette K. PangrleRobert A. Huertas
    • Minh Van NgoSimon S. ChanSuzette K. PangrleRobert A. Huertas
    • C23C16/40H01L21/316H01L21/768H01L21/76H01L21/469
    • H01L21/02164C23C16/402H01L21/02211H01L21/02274H01L21/31608H01L21/76801
    • In one embodiment, the present invention relates to a method of depositing a dielectric layer over a stacked interconnect structure, involving the steps of: providing a substrate having at least one stacked interconnect structure comprising at least one of an aluminum layer and an aluminum alloy layer; depositing the dielectric layer over the stacked interconnect structureunder a pressure from about 1 mTorr to about 6 mTorr, an O.sub.2 flow rate from about 110 sccm to about 130 sccm and a silane flow rate from about 52 sccm to about 60 sccm at a bias power from about 2500 W to about 3100 W,under a pressure from about 2 Torr to about 2.8 Torr, an N.sub.2 flow rate from about 7 l to about 11.5 l, an N.sub.2 O flow rate from about 1 l to about 2 l and a silane flow rate from about 250 sccm to about 300 sccm at a power from about 900 W to about 1300 W at a temperature from about 300.degree. C. to about 350.degree. C., orunder a pressure from about 2 Torr to about 2.8 Torr, an N.sub.2 flow rate from about 7 l to about 11.5 l, an N.sub.2 O flow rate from about 1 l to about 2 l and a silane flow rate from about 80 sccm to about 120 sccm at a power from about 900 W to about 1300 W at a temperature from about 390.degree. C. to about 410.degree. C.
    • 在一个实施例中,本发明涉及一种在堆叠的互连结构上沉积电介质层的方法,其包括以下步骤:提供具有至少一个堆叠互连结构的衬底,所述堆叠互连结构包括铝层和铝合金层中的至少一个 ; 在约1mTorr至约6mTorr的压力下,将电介质层沉积在堆叠的互连结构上,O 2流速为约110sccm至约130sccm,硅烷流速为约52sccm至约60sccm,偏置功率 约2500W至约3100W,在约2托至约2.8托的压力下,N 2流速为约7升至约11.5升,N 2 O流速为约1升至约2升,硅烷流量 在约300至约350℃的温度或约2托至约2.8托的压力下以约900至约1300瓦的功率从约250sccm至约300sccm的速率, N 2流速为约7升至约11.5升,N 2 O流速为约1升至约2升,硅烷流速为约80sccm至约120sccm,功率为约900W至约1300W, 温度约390℃至约410℃
    • 52. 发明授权
    • Method for depositing silicon nitride using low temperatures
    • 低温沉积氮化硅的方法
    • US6140255A
    • 2000-10-31
    • US261543
    • 1999-03-03
    • Minh Van NgoTerri Jo KitsonKhanh Nguyen
    • Minh Van NgoTerri Jo KitsonKhanh Nguyen
    • C23C16/40C23C16/509H01L21/033H01L21/316H01L21/31H01L21/469
    • C23C16/402C23C16/5096H01L21/02164H01L21/02211H01L21/02274H01L21/0332H01L21/31612
    • A method for depositing silicon nitride on a semiconductor wafer uses plasma enhanced chemical vapor deposition at very low temperatures. The temperature in a silicon nitride deposition chamber is set to be about 170.degree. C. or less. Silane gas (SiH.sub.4) flows into the silicon nitride deposition chamber with a flow rate in a range of from about 300 sccm (standard cubic cm per minute) to about 500 sccm. Nitrogen gas (N.sub.2) flows into the silicon nitride deposition chamber with a flow rate in a range of from about 500 sccm to about 2000 sccm. Ammonia gas (NH.sub.3) flows into the silicon nitride deposition chamber with a flow rate in a range of from about 1.0 slm to about 2.2 slm. A high frequency RF signal is applied on a showerhead within the deposition chamber. A low frequency RF signal is applied on a heating block for holding the semiconductor wafer. A predetermined volume for the silicon nitride deposition chamber is used such that pressure within the silicon nitride deposition chamber is in a range of from about 1.0 torr to about 2.4 torr. The semiconductor wafer is placed inside the silicon nitride deposition chamber for a soak time period of about 30 seconds or greater before the high frequency RF signal is applied on the showerhead in the deposition chamber and the low frequency RF signal is applied on the heating block. When the semiconductor wafer reaches the deposition temperature, the high frequency RF signal and the low frequency RF signal are applied for deposition of the silicon nitride layer onto the semiconductor wafer. By using low temperatures during the deposition of the silicon nitride layer, the structural integrity of any structure already on the semiconductor wafer is advantageously preserved.
    • 在半导体晶片上沉积氮化硅的方法在非常低的温度下使用等离子体增强化学气相沉积。 氮化硅沉积室中的温度设定为约170℃以下。 硅烷气体(SiH4)以约300sccm(标准立方厘米每分钟)的流速流入氮化硅沉积室至约500sccm。 氮气(N 2)以约500sccm至约2000sccm的流速流入氮化硅沉积室。 氨气(NH 3)以约1.0slm至约2.2slm的流速流入氮化硅沉积室。 高频RF信号施加在沉积室内的喷头上。 将低频RF信号施加在用于保持半导体晶片的加热块上。 使用用于氮化硅沉积室的预定体积,使得氮化硅沉积室内的压力在约1.0托至约2.4托的范围内。 将半导体晶片放置在氮化硅沉积室的内部,用于在沉积室内的喷头上施加高频RF信号之前约30秒或更长的浸泡时间,并且将低频RF信号施加到加热块上。 当半导体晶片达到沉积温度时,施加高频RF信号和低频RF信号以将氮化硅层沉积到半导体晶片上。 通过在沉积氮化硅层期间使用低温,有利地保留已经在半导体晶片上的任何结构的结构完整性。