Copper interconnect structure and method of formation
    4.
    发明授权
    Copper interconnect structure and method of formation 失效
    铜互连结构和形成方法

    公开(公告)号:US06174810B1

    公开(公告)日:2001-01-16

    申请号:US09055510

    申请日:1998-04-06

    IPC分类号: H01L2144

    摘要: In one embodiment, a copper interconnect structure is formed by depositing a dielectric layer (28) on a semiconductor substrate (10). The dielectric layer (28) is then patterned to form interconnect openings (29). A layer of copper (34) is then formed within the interconnect openings (29). A portion of the copper layer (34) is then removed to form copper interconnects (39) within the interconnect openings (29). A copper barrier layer (40) is then formed overlying the copper interconnects (39). Adhesion between the copper barrier layer (40) and the copper interconnects (39) is improved by exposing the exposed surface of the copper interconnects (39) to a plasma generated using only ammonia as a source gas.

    摘要翻译: 在一个实施例中,通过在半导体衬底(10)上沉积介电层(28)来形成铜互连结构。 然后将电介质层(28)图案化以形成互连开口(29)。 然后在互连开口(29)内形成一层铜(34)。 然后去除铜层(34)的一部分以在互连开口(29)内形成铜互连(39)。 然后在铜互连(39)上形成铜阻挡层(40)。 通过将铜互连(39)的暴露表面暴露于仅使用氨作为源气体产生的等离子体,可以改善铜阻挡层(40)和铜互连(39)之间的粘合性。

    Method of forming an interlayer dielectric
    5.
    发明授权
    Method of forming an interlayer dielectric 有权
    形成层间电介质的方法

    公开(公告)号:US07442598B2

    公开(公告)日:2008-10-28

    申请号:US11148455

    申请日:2005-06-09

    IPC分类号: H01L21/8238 H01L21/302

    CPC分类号: H01L21/76834 H01L21/31111

    摘要: A method for forming a semiconductor device comprises providing a semiconductor substrate; forming a first stressor layer over a surface of the semiconductor substrate; selectively removing portions of the first stressor layer; forming a second stressor layer over the surface of the semiconductor substrate and the first stressor layer; and selectively removing portions of the second stressor layer using an isotropic etch. In one embodiment, the isotropic etch is a wet etch that selectively removes the second stressor layer without removing a significant amount of the first stressor layer and also planarizing a boundary between the first stressor layer and the second stressor layer.

    摘要翻译: 一种形成半导体器件的方法包括提供半导体衬底; 在所述半导体衬底的表面上形成第一应力层; 选择性地去除所述第一应激层的部分; 在所述半导体衬底和所述第一应力层的表面上形成第二应力层; 并且使用各向同性蚀刻选择性地去除第二应力层的部分。 在一个实施例中,各向同性蚀刻是湿蚀刻,其在不去除大量的第一应力层的情况下选择性地去除第二应力层,并且还平面化第一应力层和第二应力层之间的边界。

    Method for forming an inlaid via in a semiconductor device
    6.
    发明授权
    Method for forming an inlaid via in a semiconductor device 失效
    在半导体器件中形成镶嵌通孔的方法

    公开(公告)号:US6054377A

    公开(公告)日:2000-04-25

    申请号:US858109

    申请日:1997-05-19

    摘要: A inlaid interconnect is formed in a semiconductor device (30). A first interlayer dielectric (ILD) 40 is deposited and etched to form a via opening (44). An etchstop layer (42) is deposited on ILD (40). A second ILD (45) is deposited on etchstop layer (42) in a manner so that a pinch-off region (46) is formed to prevent substantial deposition of the ILD material into via opening (44). While a small deposit (47) of ILD material may form within the via opening, this can be easily removed in a subsequent etch of ILD (45) which forms a trench opening (48) in ILD (45). A metal layer (50) is then deposited and polished to form a metal interconnect having a trench portion (52) and a via portion (54) in device (30). The present invention avoids the need for a substantial over-etch to clear the via, and avoids the need to form a thick resist mask to form the via opening, while maintaining a controlled via diameter.

    摘要翻译: 嵌入的互连形成在半导体器件(30)中。 沉积和蚀刻第一层间电介质(ILD)40以形成通孔(44)。 蚀刻阻挡层(42)沉积在ILD(40)上。 第二ILD(45)以这样的方式沉积在蚀刻阻挡层(42)上,使得形成夹断区域(46)以防止ILD材料大量沉积到通孔(44)中。 虽然ILD材料的小沉积物(47)可以在通孔开口内形成,但是在ILD(45)中形成沟槽开口(48)的ILD(45)的后续蚀刻中可以容易地去除这种沉积物(47)。 然后沉积和抛光金属层(50)以形成在器件(30)中具有沟槽部分(52)和通孔部分(54)的金属互连。 本发明避免了实质上过度蚀刻以清除通孔的需要,并避免需要形成厚的抗蚀剂掩模以形成通路孔,同时保持受控的通孔直径。

    Method for capping copper in semiconductor devices
    7.
    发明授权
    Method for capping copper in semiconductor devices 失效
    在半导体器件中封装铜的方法

    公开(公告)号:US5447887A

    公开(公告)日:1995-09-05

    申请号:US222759

    申请日:1994-04-01

    摘要: A silicon nitride layer (34) has improved adhesion to underlying copper interconnect members (30) through the incorporation of an intervening copper silicide layer (32). Layer (32) is formed in-situ with a plasma enhanced chemical vapor deposition (PECVD) process for depositing silicon nitride layer (34). To form layer (32), a semiconductor substrate (12) is provided having a desired copper pattern formed thereon. The copper pattern may include copper interconnects, copper plugs, or other copper members. The substrate is placed into a PECVD reaction chamber. Silane is introduced into the reaction chamber in the absence of a plasma to form a copper silicide layer on any exposed copper surfaces. After a silicide layer of a sufficient thickness (for example, 10 to 100 angstroms) is formed, PECVD silicon nitride is deposited. The copper silicide layer improves adhesion, such that silicon nitride layer is less prone to peeling away from underlying copper members.

    摘要翻译: 氮化硅层(34)通过引入中间铜硅化物层(32)而具有改进的对底层铜互连构件(30)的粘合性。 用等离子体增强化学气相沉积(PECVD)工艺原位形成层(32),用于沉积氮化硅层(34)。 为了形成层(32),提供了在其上形成有所需铜图案的半导体衬底(12)。 铜图案可以包括铜互连,铜插头或其它铜构件。 将基板放入PECVD反应室中。 在不存在等离子体的情况下将硅烷引入反应室,以在任何暴露的铜表面上形成硅化铜层。 在形成足够厚度(例如10至100埃)的硅化物层之后,沉积PECVD氮化硅。 硅化铜层提高粘合性,使得氮化硅层不容易从下面的铜构件剥离。

    METHOD FOR STRAINING A SEMICONDUCTOR DEVICE
    9.
    发明申请
    METHOD FOR STRAINING A SEMICONDUCTOR DEVICE 审中-公开
    用于应变半导体器件的方法

    公开(公告)号:US20070298623A1

    公开(公告)日:2007-12-27

    申请号:US11426463

    申请日:2006-06-26

    IPC分类号: H01L21/31 H01L21/469

    摘要: A strained semiconductor layer is achieved by an overlying stressed dielectric layer. The stress in the dielectric layer is increased by a radiation anneal. The radiation anneal can be either by scanning using a laser beam or a flash tool that provides the anneal to the whole dielectric layer simultaneously. The heat is intense, preferably 900-1400 degrees Celcius, but for a very short duration of less than 10 milliseconds; preferably about 1 millisecond or even shorter. The result of the radiation anneal can also be used to activate the source/drain. Thus, this type of radiation anneal can result in a larger change in stress, activation of the source/drain, and still no expansion of the source/drain.

    摘要翻译: 应变半导体层通过覆盖的应力介电层实现。 电介质层中的应力通过辐射退火而增加。 辐射退火可以是通过使用激光束进行扫描或者同时向整个电介质层提供退火的闪光工具。 热量很强,最好是900-1400摄氏度,但持续时间不到10毫秒; 优选约1毫秒甚至更短。 辐射退火的结果也可用于激活源极/漏极。 因此,这种类型的辐射退火可导致应力的变化较大,源极/漏极的激活以及源极/漏极的扩展。