摘要:
A method comprises, in a reaction chamber, depositing a seed layer of germanium over a silicon-containing surface at a first temperature. The seed layer has a thickness between about one monolayer and about 1000 Å. The method further comprises, after depositing the seed layer, increasing the temperature of the reaction chamber while continuing to deposit germanium. The method further comprises holding the reaction chamber in a second temperature range while continuing to deposit germanium. The second temperature range is greater than the first temperature.
摘要:
A method comprises, in a reaction chamber, depositing a seed layer of germanium over a silicon-containing surface at a first temperature. The seed layer has a thickness between about one monolayer and about 1000 Å. The method further comprises, after depositing the seed layer, increasing the temperature of the reaction chamber while continuing to deposit germanium. The method further comprises holding the reaction chamber in a second temperature range while continuing to deposit germanium. The second temperature range is greater than the first temperature.
摘要:
A method comprises, in a reaction chamber, depositing a seed layer of germanium over a silicon-containing surface at a first temperature. The seed layer has a thickness between about one monolayer and about 1000 Å. The method further comprises, after depositing the seed layer, increasing the temperature of the reaction chamber while continuing to deposit germanium. The method further comprises holding the reaction chamber in a second temperature range while continuing to deposit germanium. The second temperature range is greater than the first temperature.
摘要:
Chemical vapor deposition methods use trisilane and a halogen-containing etchant source (such as chlorine) to selectively deposit Si-containing films over selected regions of mixed substrates. Dopant sources may be intermixed with the trisilane and the etchant source to selectively deposit doped Si-containing films. The selective deposition methods are useful in a variety of applications, such as semiconductor manufacturing.
摘要:
Methods for depositing epitaxial films such as epitaxial Ge and SiGe films. During cooling from high temperature processing to lower deposition temperatures for Ge-containing layers, Si or Ge compounds are provided to the substrate. Smooth, thin, relatively defect-free Ge or SiGe layers result. Retrograded relaxed SiGe is also provided between a relaxed, high Ge-content seed layer and an overlying strained layer.
摘要:
Methods for depositing epitaxial films such as epitaxial Ge and SiGe films. During cooling from high temperature processing to lower deposition temperatures for Ge-containing layers, Si or Ge compounds are provided to the substrate. Smooth, thin, relatively defect-free Ge or SiGe layers result. Retrograded relaxed SiGe is also provided between a relaxed, high Ge-content seed layer and an overlying strained layer.
摘要:
Chemical vapor deposition methods use trisilane and a halogen-containing etchant source (such as chlorine) to selectively deposit Si-containing films over selected regions of mixed substrates. Dopant sources may be intermixed with the trisilane and the etchant source to selectively deposit doped Si-containing films. The selective deposition methods are useful in a variety of applications, such as semiconductor manufacturing.
摘要:
Methods for depositing epitaxial films such as epitaxial Ge and SiGe films. During cooling from high temperature processing to lower deposition temperatures for Ge-containing layers, Si or Ge compounds are provided to the substrate. Smooth, thin, relatively defect-free Ge or SiGe layers result. Retrograded relaxed SiGe is also provided between a relaxed, high Ge-content seed layer and an overlying strained layer.
摘要:
Dual channel heterostructures comprising strained Si and strained Ge-containing layers are disclosed, along with methods for producing such structures. In preferred embodiments, a strain-relaxed buffer layer is deposited on a carrier substrate, a strained Si layer is deposited over the strain-relaxed buffer layer and a strained Ge-containing layer is deposited over the strained Si layer. The structure can be transferred to a host substrate to produce the strained Si layer over the strained Ge-containing layer. By depositing the Si layer first, the process avoids Ge agglomeration problems.
摘要:
Methods of making Si-containing films that contain relatively high levels of substitutional dopants involve chemical vapor deposition using trisilane and a dopant precursor. Extremely high levels of substitutional incorporation may be obtained, including crystalline silicon films that contain 2.4 atomic % or greater substitutional carbon. Substitutionally doped Si-containing films may be selectively deposited onto the crystalline surfaces of mixed substrates by introducing an etchant gas during deposition.