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    • 7. 发明授权
    • Tungsten silicide nitride as a barrier for high temperature anneals to improve hot carrier reliability
    • 硅化钨氮化物作为高温退火的屏障,以提高热载体的可靠性
    • US06365511B1
    • 2002-04-02
    • US09324946
    • 1999-06-03
    • Isik C. KizilyalliSailesh M. MerchantJoseph R. Radosevich
    • Isik C. KizilyalliSailesh M. MerchantJoseph R. Radosevich
    • H01L214763
    • H01L21/76838H01L21/76841
    • The present invention provides a method of forming a metal stack structure over a substrate of a semiconductor device, comprising: (a) forming a first metal layer over the substrate, (b) forming a tungsten silicide nitride layer over the first metal layer, (c) forming a second metal layer over the tungsten silicide nitride layer, and (d) annealing the metal stack structure at a diffusion temperature. The tungsten silicide nitride layer inhibits diffusion of the metal in the metal stack. In one embodiment, the annealing is performed in the presence of a forming gas mixture comprising deuterium. In one particularly advantageous embodiment, the metal stack is formed in a contact opening or via. In yet other embodiments, the first metal layer may be a stack layer of titanium and titanium nitride and the second metal layer may be aluminum or copper.
    • 本发明提供一种在半导体器件的衬底上形成金属堆叠结构的方法,包括:(a)在衬底上形成第一金属层,(b)在第一金属层上形成硅化钨化物层,( c)在所述硅化钨氮化物层上形成第二金属层,和(d)在扩散温度下退火所述金属堆叠结构。 硅化钨层抑制金属堆叠中的金属的扩散。 在一个实施方案中,在包含氘的形成气体混合物的存在下进行退火。 在一个特别有利的实施例中,金属叠层形成在接触开口或通孔中。 在其它实施例中,第一金属层可以是钛和氮化钛的堆叠层,第二金属层可以是铝或铜。
    • 8. 发明授权
    • Multi-layered metal silicide resistor for Si Ic's
    • Si Ic的多层金属硅化物电阻
    • US06359339B1
    • 2002-03-19
    • US09480224
    • 2000-01-10
    • Richard W. GregorIsik C. KizilyalliSailesh M. MerchantJaseph R. RadosevichPradip K. Roy
    • Richard W. GregorIsik C. KizilyalliSailesh M. MerchantJaseph R. RadosevichPradip K. Roy
    • H01L2348
    • H01L28/24H01L27/0802
    • The present invention provides a unique a resistor formed on a semiconductor substrate. The resistor preferably comprises a first resistor layer that includes a first metal silicide, such as tungsten silicide, and nitrogen and that is formed on the substrate. The first layer has a first thickness and a concentration of nitrogen incorporated therein. The nitrogen concentration may be varied to obtain a desired resistive value of the resistor. Thus, depending on the concentration of nitrogen, a wide range of resistive values may be achieved. The resistor further comprises a second resistor layer with a second thickness that includes a second metal silicide and that is formed on the first resistor layer. Thus, the present invention provides a metal silicide-based resistor having nitrogen incorporated therein which allows the resistance of the resistor to be tailored to specific electrical applications. Yet at the same time, the resistor is far less susceptible to temperature and voltage variation than conventional diffused resistors and, thereby, provides a more precise resistor.
    • 本发明提供了形成在半导体衬底上的独特的电阻器。 电阻器优选地包括第一电阻层,该第一电阻层包括第一金属硅化物,例如硅化钨和氮,并且形成在衬底上。 第一层具有掺入其中的第一厚度和氮浓度。 可以改变氮浓度以获得电阻器的期望电阻值。 因此,取决于氮的浓度,可以实现宽范围的电阻值。 电阻器还包括具有第二厚度的第二电阻层,该第二电阻层包括第二金属硅化物,并形成在第一电阻层上。 因此,本发明提供一种其中结合有氮化物的金属硅化物基电阻器,其允许将电阻器的电阻定制为特定的电气应用。 然而与此同时,电阻器比常规扩散电阻器更不易受温度和电压变化的影响,从而提供更精确的电阻器。