摘要:
An intermediate structure from which a dual damascene structure may be fabricated includes a first-formed, unfaceted via hole and an intersecting trench both formed by gas plasma etching of a dielectric layer. The sidewall of the via hole is maintained unfaceted during and after trench formation by substantially filling it with a gas-plasma-etchable plug prior to trench formation. The presence of the plug in the via hole during gas plasma etching of the trench, also produces a trench bottom that is substantially flat.
摘要:
A method for preventing the formation of contaminating polymeric films on the backsides of semiconductor substrates includes providing an oxygen-impregnated focus ring and/or an oxygen-impregnated chuck that releases oxygen during etching operations. The method further provides delivering oxygen gas to the substrate by mixing oxygen in the cooling gas mixture, maintaining the focus ring at a temperature no greater than the substrate temperature during etching and cleaning the substrate using a two step plasma cleaning sequence that includes suspending the substrate above the chuck.
摘要:
A method of reducing a charge on a substrate to prevent an arcing incident in a subsequent etch process is described. A patterned substrate is fastened to a chuck in a process chamber. A discharge process is performed that includes the three steps of (a) coupling the chuck to a 0 volt connection, (b) generating a plasma, and (c) coupling the chuck to a high voltage connection. The three steps are carried out in any sequence. An inert gas or an inert gas and an etching gas are flowed into the chamber during the discharge sequence. Alternatively, a fluorocarbon CXFYHZ or a fluorocarbon and a gas such as O2, H2, N2, N2O, CO, CO2, He or Ar is flowed into the chamber during the discharge sequence. The method is compatible with batch or single wafer processes and is extendable to etching low k dielectric layers with poor thermal conductivity.
摘要翻译:描述了一种减少衬底上的电荷以防止在后续蚀刻工艺中的电弧入射的方法。 图案化衬底被固定到处理室中的卡盘。 执行放电处理,其包括以下三个步骤:(a)将卡盘耦合到0伏连接,(b)产生等离子体,以及(c)将卡盘耦合到高压连接。 三个步骤以任何顺序进行。 在放电顺序期间,惰性气体或惰性气体和蚀刻气体流入腔室。 或者,碳氟化合物C 1 H Z,或碳氟化合物和气体如O 2 H,H N 2,N 2,N 2 O,CO,CO 2,He或Ar流入室 在放电序列期间。 该方法与批次或单晶片工艺兼容,并且可扩展到蚀刻导热性差的低k电介质层。
摘要:
A method for forming a patterned oxygen containing plasma etchable layer. There is first provided a substrate. There is then formed upon the substrate a blanket oxygen containing plasma etchable layer. There is then formed upon the blanket oxygen containing plasma etchable layer a blanket hard mask layer. There is then formed upon the blanket hard mask layer a patterned photoresist layer. There is then etched while employing a first plasma etch method in conjunction with the patterned photoresist layer as a first etch mask layer the blanket hard mask layer to form a patterned hard mask layer. There is then etched while employing a second plasma etch method in conjunction with at least the patterned hard mask layer as a second etch mask layer the blanket oxygen containing plasma etchable layer to form a patterned oxygen containing plasma etchable layer. The second plasma etch method employs a second etchant gas composition comprising: (1) an oxygen containing etchant gas which upon plasma activation provides an active oxygen etching species; and (2) boron trichloride.
摘要:
A method for fabricating a semiconductor device is disclosed. In one embodiment, the method may include providing a substrate; forming a gate structure including a first dummy gate over the substrate; removing the first dummy gate from the gate structure to form a trench; forming an interfacial layer, high-k dielectric layer, and capping layer to partially fill in the trench; forming a second dummy gate over the capping layer, wherein the second dummy gate fills the trench; and replacing the second dummy gate with a metal gate. In one embodiment, the method may include providing a substrate; forming an interfacial layer over the substrate; forming a high-k dielectric layer over the interfacial layer; forming an etch stop layer over the high-k dielectric layer; forming a capping layer including a low thermal budget silicon over the etch stop layer; forming a dummy gate layer over the capping layer; forming a gate structure; and performing a gate replacement process.
摘要:
A semiconductor device includes a substrate having shallow trench isolation and source/drain regions located therein, a gate stack located on the substrate between the source/drain regions, a first gate spacer on the sidewall of the gate stack, and a second gate spacer on the sidewall of the first gate spacer.
摘要:
A method for fabricating an integrated circuit device is disclosed. An exemplary method can include providing a substrate having a first region, a second region, and a third region; and forming a first gate structure in the first region, a second gate structure in the second region, and a third gate structure in the third region, wherein the first, second, and third gate structures include a gate dielectric layer, the gate dielectric layer being a first thickness in the first gate structure, a second thickness in the second gate structure, and a third thickness in the third gate structure. Forming the gate dielectric layer of the first, second, and third thicknesses can include forming an etching barrier layer over the gate dielectric layer in at least one of the first, second, or third regions while forming the first, second, and third gate structures, and/or prior to forming the gate dielectric layer in at least one of the first, second, or third regions, performing an implantation process on the at least one region.
摘要:
A semiconductor structure having a high-k dielectric and its method of manufacture is provided. A method includes forming a first dielectric layer over the substrate, a metal layer over the first dielectric layer, and a second dielectric layer over the metal layer. A method further includes annealing the substrate in an oxidizing ambient until the three layers form a homogenous high-k dielectric layer. Forming the first and second dielectric layers comprises a non-plasma deposition process such atomic layer deposition (ALD), or chemical vapor deposition (CVD). A semiconductor device having a high-k dielectric comprises an amorphous high-k dielectric layer, wherein the amorphous high-k dielectric layer comprises a first oxidized metal and a second oxidized metal. The atomic ratios of all oxidized metals are substantially uniformly within the amorphous high-k dielectric layer.
摘要:
A method for fabricating a semiconductor device is disclosed. The method includes providing a substrate; forming at least one gate structure over the substrate; forming a plurality of doped regions in the substrate; forming an etch stop layer over the substrate; removing a first portion of the etch stop layer, wherein a second portion of the etch stop layer remains over the plurality of doped regions; forming a hard mask layer over the substrate; removing a first portion of the hard mask layer, wherein a second portion of the hard mask layer remains over the at least one gate structure; and forming a first contact through the second portion of the hard mask layer to the at least one gate structure, and a second contact through the second portion of the etch stop layer to the plurality of doped regions.
摘要:
A plasma processing operation uses a gas mixture of N2 and H2 to both remove a photoresist film and treat a low-k dielectric material. The plasma processing operation prevents degradation of the low-k material by forming a protective layer on the low-k dielectric material. Carbon from the photoresist layer is activated and caused to complex with the low-k dielectric, maintaining a suitably high carbon content and a suitably low dielectric constant. The plasma processing operation uses a gas mixture with H2 constituting at least 10%, by volume, of the gas mixture.