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    • 3. 发明授权
    • Method for forming an inlaid via in a semiconductor device
    • 在半导体器件中形成镶嵌通孔的方法
    • US6054377A
    • 2000-04-25
    • US858109
    • 1997-05-19
    • Stanley M. FilipiakJohn C. ArnoldPhillip Crabtree
    • Stanley M. FilipiakJohn C. ArnoldPhillip Crabtree
    • H01L21/316H01L21/768H01L21/441
    • H01L21/76807H01L21/31625H01L2221/1031H01L2221/1036
    • 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.
    • 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。
    • 4. 发明授权
    • Method for capping copper in semiconductor devices
    • 在半导体器件中封装铜的方法
    • US5447887A
    • 1995-09-05
    • US222759
    • 1994-04-01
    • Stanley M. FilipiakAvgerinos Gelatos
    • Stanley M. FilipiakAvgerinos Gelatos
    • H01L21/768H01L21/44H01L21/48
    • H01L21/76849H01L21/76834H01L21/76867H01L21/76886
    • 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.
    • 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。