Abstract:
A semiconductor device (100), in which a plurality of crystal defects (14a) for controlling the life time of carries are distributed in a silicon substrate (8), is characterized in that the total number of the crystal defects (14a) that cause a trap level that differs from the energy level of the center of the band gap by less than 0.2 eV, is less than the number of the crystal defects (14a) that cause the trap level that is the closest to the energy level of the center of the band gap among trap levels that differ from the energy level of the center of the band gap by 0.2 eV or more.
Abstract:
Substrates for an electronic circuit and device manufacturing methods are disclosed. According to an embodiment, the substrate comprises: a silicon or germanium wafer impregnated with impurities that form one or more deep energy levels within the band gap of the material forming the wafer, wherein at least one of said deep energy levels is positioned at least 0.3 eV away from the conduction band if the level is a donor level or at least 0.3 eV away from the valence band if the level is an acceptor level; and a device layer formed on a surface of said wafer, said device layer comprising electronically functional components formed in a layer of Periodic Table Group III-V or II-VI material. The wafer may be formed from Cz silicon or Cz germanium, for example.
Abstract:
A method is provided, along with a corresponding apparatus, for filling a high aspect ratio hole without voids or for producing high aspect ratio structures without voids. A beam having a diameter smaller than the diameter of the hole is directed into the hole to induced deposition beginning in the center region of the hole bottom. After an elongated structure is formed in the hole by the beam-induced deposition, a beam can then be scanned in a pattern at least as large as the hole diameter to fill the remainder of the hole. The high aspect ratio hole can then be cross-sectioned using an ion beam for observation without creating artefacts. When electron-beam-induced deposition is used, the electrons preferably have a high energy to reach the bottom of the hole, and the beam has a low current, to reduce spurious deposition by beam tails.
Abstract:
According to a disclosed embodiment, there is provided a method of processing a silicon wafer for use in a substrate for an electronic circuit, comprising: impregnating the silicon wafer with impurities that form one or more deep energy levels within the band gap of silicon, wherein at least one of said deep energy levels is positioned at least 0.3 eV away from the conduction band if the level is a donor level or at least 0.3 eV away from the valence band if the level is an acceptor level; and pre-processing the silicon wafer, prior to or after said impregnation step, so that precipitation of oxide during, after, or during and after, said impregnating step is suppressed.
Abstract:
Methods of processing a silicon wafer for an electronic circuit, substrates for an electronic circuit, and device manufacturing methods are disclosed. According to an embodiment the method of processing a silicon wafer comprises impregnating the silicon wafer with impurities that form one or more deep energy levels within the band gap of silicon, wherein at least one of said deep energy levels is positioned at least 0.3 eV away from the conduction band if the level is a donor level or at least 0.3 eV away from the valence band if the level is an acceptor level, wherein: said impregnating step is performed in such a way that the ratio between the maximum concentration of said impurities in said silicon wafer and the average concentration of said impurities in said silicon wafer is less than 7:1.
Abstract:
In a method of manufacturing a solid-state, particularly a semiconductor device, comprising the steps of treating a surface of a carrier body, covering the treated surface with an active layer system including at least one thin layer, the active layer system determining an outer surface of the device, then depositing a covering thin layer on the outer surface, at least partly at least one of the thin layers is doped or connected with an isotope having decay product influencing at least one predetermined physicaly property of a selected thin layer, the isotope being present in an amount causing modification of the predetermined physical property after a predetermined period. The proposed solid-state device, comprising a carrier body, a thin layer system including at least one thin layer determining an outer surface of the device and a covering layer for protecting the outer surface, is completed or made with an inner part or at least one thin layer including at one or more radioactive doping component for influencing at least one characteristic physical property of the active layer system.