Stable and low resistance metal/barrier/silicon stack structure and
related process for manufacturing
    1.
    发明授权
    Stable and low resistance metal/barrier/silicon stack structure and related process for manufacturing 失效
    稳定和低电阻金属/屏障/硅堆叠结构及相关制造工艺

    公开(公告)号:US6100188A

    公开(公告)日:2000-08-08

    申请号:US108474

    申请日:1998-07-01

    IPC分类号: H01L21/28 H01L29/49 H01L21/44

    CPC分类号: H01L29/4941 H01L21/28061

    摘要: A metal-poly stack gate structure and associated method for forming a conductive barrier layer between W and poly in the metal-gate stack gate structure. The process includes the steps of depositing doped silicon on a substrate; forming nitride on the deposited silicon; depositing a metal on the nitride to form a metal/nitride/deposited silicon stack; and thermally treating the stack to transform the nitride into a conductive barrier layer between the metal and the deposited silicon. The thermal treatment transforms the nitride layer (SiN.sub.x or SiN.sub.x O.sub.y) into a conductive barrier (WSi.sub.x N.sub.y or WSi.sub.x N.sub.y O.sub.z) to form a W/barrier/poly stack gate structure. The barrier layer blocks reaction between W and Si, enhances sheet resistance, enhances adhesion between the W and the poly, and is stable at high temperatures.

    摘要翻译: 一种用于在金属 - 栅极堆叠栅极结构中在W和多晶之间形成导电阻挡层的金属 - 多晶堆叠栅极结构和相关联的方法。 该方法包括在衬底上沉积掺杂硅的步骤; 在沉积的硅上形成氮化物; 在氮化物上沉积金属以形成金属/氮化物/沉积的硅堆叠; 并且对叠层进行热处理以将氮化物转变成金属和沉积的硅之间的导电阻挡层。 热处理将氮化物层(SiN x或SiN x O y)转换成导电屏障(WSixNy或WSixNyOz)以形成W /势垒/多晶堆叠栅极结构。 阻挡层阻止W和Si之间的反应,增强了薄层电阻,增强了W和聚硅之间的粘附性,并且在高温下是稳定的。

    Low resistivity poly-silicon gate produced by selective metal growth
    2.
    发明授权
    Low resistivity poly-silicon gate produced by selective metal growth 有权
    通过选择性金属生长生产的低电阻率多晶硅栅极

    公开(公告)号:US06184129B2

    公开(公告)日:2001-02-06

    申请号:US09405265

    申请日:1999-09-23

    IPC分类号: H01L2148

    摘要: A method for fabricating a low resistivity polymetal silicide conductor/gate comprising, the steps of forming a polysilicon (66) over a gate oxide (64) followed by protection of the polysilicon (66) with a sacrificial material (68), is disclosed. Gate sidewalls (70) are created to protect the sides of the polysilicon (66) and the sacrificial material (68), followed by stripped the sacrificial material (68) to expose the top surface of the polysilicon (66). Next, a diffusion barrier (76) is deposited over the exposed polysilicon (66) and a metal layer (78) is selectively grown on the diffusion barrier (76) to form a gate contact and conductor. Finally, a dielectric layer (80) is deposited over the selectively grown metal layer (78), the sidewalls (70) and the gate oxide (64).

    摘要翻译: 公开了一种用于制造低电阻率多金属硅化物导体/栅极的方法,包括以下步骤:在栅极氧化物(64)上形成多晶硅(66),随后用牺牲材料(68)保护多晶硅(66)。 产生栅极侧壁(70)以保护多晶硅(66)和牺牲材料(68)的侧面,随后剥离牺牲材料(68)以暴露多晶硅(66)的顶表面。 接下来,在暴露的多晶硅(66)上沉积扩散阻挡层(76),并且在扩散阻挡层(76)上选择性地生长金属层(78)以形成栅极接触和导体。 最后,介电层(80)沉积在选择性生长的金属层(78),侧壁(70)和栅极氧化物(64)上。

    Method of forming diffusion barriers for copper metallization in integrated cirucits
    3.
    发明授权
    Method of forming diffusion barriers for copper metallization in integrated cirucits 有权
    在集成的铁芯中形成铜金属化的扩散阻挡层的方法

    公开(公告)号:US06245672B1

    公开(公告)日:2001-06-12

    申请号:US09177412

    申请日:1998-10-23

    IPC分类号: H01L214763

    摘要: An integrated circuit structure including copper metallization (20, 32, 42), and a method of fabricating the same are disclosed. The structure includes a doped region (7) of a silicon substrate (9), which is typically clad with a metal silicide film (12) formed by way of direct react silicidation. At contact locations (CT) at which the copper metallization (20, 32, 42) is to make contact to the doped region (7), a chemically-densified barrier layer (16, 30, 38) provides a diffusion barrier to the overlying copper metallization (20, 32, 42). The chemically-densified barrier layer (16, 30, 38) is formed by an anneal of the structure to react impurities (14, 28, 36) with the underlying refractory-metal-based film (12, 34); the impurities are introduced by way of wet chemistry, plasma bombardment, or from the ambient in which the structure is annealed.

    摘要翻译: 公开了一种包括铜金属化(20,32,42)的集成电路结构及其制造方法。 该结构包括硅衬底(9)的掺杂区域(7),其通常用通过直接反应硅化形成的金属硅化物膜(12)包覆。 在铜金属化层(20,32,42)将与掺杂区域(7)接触的接触位置(CT)处,化学致密化的势垒层(16,30,38)为覆盖层 铜金属化(20,32,42)。 化学致密化的阻挡层(16,30,38)通过该结构的退火形成,以使杂质(14,28,36)与下面的耐熔金属基膜(12,34)反应; 杂质通过湿化学,等离子体轰击或结构退火的环境引入。

    Plasma-enhanced chemical vapor deposition of a nucleation layer in a tungsten metallization process
    4.
    发明授权
    Plasma-enhanced chemical vapor deposition of a nucleation layer in a tungsten metallization process 有权
    在钨金属化过程中等离子体增强的成核层的化学气相沉积

    公开(公告)号:US06451677B1

    公开(公告)日:2002-09-17

    申请号:US09255489

    申请日:1999-02-23

    IPC分类号: H01L213205

    摘要: An embodiment of the instant invention is a method of fabricating an electronic device formed over a semiconductor substrate and having a conductive feature comprised of tungsten, the method comprising the steps of: forming a nucleation layer over the semiconductor substrate by introducing a combination of WF6, H2 and a plasma; and forming a tungsten layer on the nucleation layer by means of chemical vapor deposition. In an alternative embodiment, an insulating layer is formed on the substrate and situated between the nucleation layer and the substrate. Preferably, this embodiment additionally includes the step of forming a nitrogen-containing layer under the nucleation layer by introducing a combination of WF6, N2, H2, and a plasma. The conductive feature is, preferably, a conductive gate structure, and the insulating layer is, preferably, comprised of: an oxide, a nitride, an insulating material with a dielectric constant substantially higher than that of an oxide, and any combination thereof.

    摘要翻译: 本发明的一个实施例是一种制造形成在半导体衬底上并且具有由钨构成的导电特征的电子器件的方法,该方法包括以下步骤:通过引入WF6的组合形成半导体衬底上的成核层, H2和等离子体; 并通过化学气相沉积在成核层上形成钨层。 在替代实施例中,绝缘层形成在衬底上并且位于成核层和衬底之间。 优选地,该实施方案另外包括通过引入WF 6,N 2,H 2和等离子体的组合在成核层下形成含氮层的步骤。 导电特征优选地是导电栅极结构,并且绝缘层优选地包括:氧化物,氮化物,具有显着高于氧化物的介电常数的绝缘材料及其任何组合。

    Si-rich surface layer capped diffusion barriers
    7.
    发明授权
    Si-rich surface layer capped diffusion barriers 有权
    富硅表面层封端扩散阻挡层

    公开(公告)号:US06680249B2

    公开(公告)日:2004-01-20

    申请号:US10185383

    申请日:2002-06-28

    IPC分类号: H01L2144

    摘要: A copper interconnect having a transition metal-nitride barrier (106) with a thin metal-silicon-nitride cap (108). A transition metal-nitride barrier (106) is formed over the structure. Then the barrier (106) is annealed in a Si-containing ambient to form a silicon-rich capping layer (108) at the surface of the barrier (106). The copper (110) is then deposited over the silicon-rich capping layer (108) with good adhesion.

    摘要翻译: 一种具有过渡金属氮化物屏障(106)与铜金属 - 氮化硅帽(108)的铜互连。 在该结构上形成过渡金属氮化物屏障(106)。 然后,阻挡层(106)在含Si环境中退火,以在阻挡层(106)的表面形成富含硅的覆盖层(108)。 然后,铜(110)以良好的粘合力沉积在富含硅的覆盖层(108)上。

    Barrier/liner with a SiNx-enriched surface layer on MOCVD prepared films
    8.
    发明授权
    Barrier/liner with a SiNx-enriched surface layer on MOCVD prepared films 失效
    在MOCVD制备的膜上具有SiN x富集表面层的阻挡层/衬垫

    公开(公告)号:US6037013A

    公开(公告)日:2000-03-14

    申请号:US34269

    申请日:1998-03-04

    CPC分类号: H01L21/3185 H01L21/28568

    摘要: A barrier/liner structure (10) and method. First, a porous nitride layer (12) is formed over a structure (18), for example, by metal-organic CVD (MOCVD). Then, the porous nitride layer (12) is exposed to a silicon- (or dopant-) containing ambient to obtain a silicon-(or dopant) rich surface layer (14). Finally, the silicon- (or dopant) rich surface layer (14) is nitrided to obtain a silicon-nitride (or dopant-nitride) enriched surface layer (16).

    摘要翻译: 屏障/衬垫结构(10)和方法。 首先,例如通过金属 - 有机CVD(MOCVD)在结构(18)上形成多孔氮化物层(12)。 然后,多孔氮化物层(12)暴露于含硅(或掺杂剂)的环境中以获得富含硅(或掺杂剂)的表面层(14)。 最后,将富含硅(或掺杂剂)的表面层(14)进行氮化,以获得富含氮化物(或氮化物)的表面层(16)。