摘要:
An epitaxial silicon wafer, which has no projections having a size of 100 nm or more and a height of 5 nm or more on an epitaxial layer, and a method for producing an epitaxial silicon wafer, wherein a single crystal ingot containing no I-region is grown when a silicon single crystal is grown by the CZ method, and an epitaxial layer is deposited on a silicon wafer sliced from the single crystal ingot and containing no I-region for the entire surface. An epitaxial wafer of high quality with no projection-like surface distortion observed as particles on an epi-layer surface is provided by forming a wafer having no I-region for the entire surface from a single crystal and depositing an epitaxial layer thereon, and a single crystal having no I-region for entire plane is produced with good yield and high productivity, thereby improving productivity of epi-wafers and realizing cost reduction.
摘要:
According to the present invention, there is disclosed a silicon single crystal wafer grown according to the CZ method which is a wafer having a diameter of 200 mm or more produced from a single crystal grown at a growth rate of 0.5 mm/min or more without doping except for a dopant for controlling resistance, wherein neither an octahedral void defect due to vacancies nor a dislocation cluster due to interstitial silicons exists as a grown-in defect, and a method for producing it. There can be provided a high quality silicon single crystal wafer having a large diameter wherein a silicon single crystal in which both of octahedral void defects and dislocation clusters which are growth defects are substantially eliminated is grown at higher rate compared with the conventional method by the usual CZ method, and furthermore by controlling a concentrations of interstitial oxygen in the crystal to be low, a precipitation amount is lowered and ununiformity of BMD in a plane of the wafer is improved, and provided a method for producing it.
摘要:
The present invention is a quartz glass crucible 5 for pulling a silicon single crystal, comprising at least an outer layer portion 23 being a translucent glass layer containing multiple bubbles in it and an inner layer portion 24 being a transparent quartz glass layer having no bubbles and a smooth surface, formed on the inner surface of the outer layer portion 23, wherein the outer layer portion 23 contains bubbles of 0.1 to 0.3 mm in diameter at the density of 1.5 to 5.0×104 bubbles/cm3. Thus, there are provided a quartz glass crucible for pulling a silicon single crystal, the quartz glass crucible being increased in mechanical strength, making it possible to suppress deformation of a quartz glass crucible for pulling a silicon single crystal during a single crystal pulling process, thereby prevent degradation in yield rate due to dislocation in a single crystal and make the manufacture of a silicon single crystal highly efficient and a method of manufacturing the same quartz glass crucible.
摘要翻译:本发明是一种用于拉制单晶硅的石英玻璃坩埚5,至少包括外层多数部分23和外层部分23,该外层部分23是包含多个气泡的半透明玻璃层,内层部分24是不含气泡的透明石英玻璃层, 形成在外层部23的内表面上的光滑表面,其中,外层部23的密度为1.5〜5.0×10 4个气泡/ cm 3的直径为0.1〜0.3mm的气泡。 因此,提供了用于拉制单晶硅的石英玻璃坩埚,石英玻璃坩埚的机械强度提高,从而可以抑制在单晶拉制工艺期间拉出硅单晶的石英玻璃坩埚的变形, 从而防止由于单晶中的位错导致的成品率的降低,并且制造高效的硅单晶,以及制造相同的石英玻璃坩埚的方法。
摘要:
In a method for producing a silicon single crystal by Czochralski method, the single crystal is grown with controlling a growth rate between a growth rate at a boundary where a defect region detected by Cu deposition remaining after disappearance of OSF ring disappears when gradually decreasing a growth rate of silicon single crystal during pulling and a growth rate at a boundary where a high oxygen precipitation Nv region having a density of BMDs of 1×107 numbers/cm3 or more and/or a wafer lifetime of 30 μsec or less after oxygen precipitation treatment disappears when gradually decreasing the growth rate further. Thereby, there is provided a silicon single crystal which does not belong to any of V region rich in vacancy, OSF region and I region rich in interstitial silicon, and has excellent electrical characteristics and gettering capability, so that yield of devices can be surely improved, and also an epitaxial wafer.
摘要翻译:在通过Czochralski法制造单晶硅的方法中,通过控制在逐渐减小生长时OSF环消失后残留的Cu沉积检测到的缺陷区域的边界处的生长速度之间的生长速率生长单晶 拉伸时的硅单晶速率和BMD密度为1×10 7 / cm 3以上的高氧沉淀Nv区域的边界处的生长速度,以及 /或在氧沉淀处理后30微米或更小的晶片寿命在进一步降低生长速率时消失。 由此,提供了不属于富含空隙的V区,OSF区和富含间隙硅的I区的任何一种的硅单晶,并且具有优异的电特性和吸杂能力,从而可以可靠地提高器件的产量 ,以及外延晶片。
摘要:
In a method for producing an SOI wafer comprising steps of implanting ions from a bond wafer surface to form an ion-implanted layer inside the wafer, bonding the ion-implanted bond wafer surface and a surface of a base wafer via an oxide film or directly, and forming an SOI wafer by delaminating by heat treatment a part of the bond wafer at the ion-implanted layer, the bond wafer is a silicon wafer that consists of a silicon single crystal grown by Czochralski method, that is occupied by N region outside OSF generated in a ring shape and that has no defect region detected by Cu deposition method. Thereby, even an extremely thin SOI layer having a thickness of 200 nm or less, can provide an SOI wafer that has an excellent electric property without micro pits caused by acid cleaning, and can be produced without increasing the number of processes.
摘要:
The present invention is a method for producing a single crystal of which a whole plane in a radial direction is a defect-free region with pulling the single crystal from a raw material melt in a chamber by Czochralski method, wherein a pulling condition is changed in a direction of the crystal growth axis during pulling the single crystal so that a margin of a pulling rate is always a predetermined value or more that the single crystal of which the whole plane in a radial direction is a defect-free region can be pulled. Thereby, there can be provided a method for producing a single crystal in which when a single crystal is produced by CZ method, the single crystal of which a whole plane in a radial direction is a defect-free region entirely in a direction of the crystal growth axis can be produced with stability.
摘要:
In a method for producing a silicon single crystal by Czochralski method, the single crystal is grown with controlling a growth rate between a growth rate at a boundary where a defect region detected by Cu deposition remaining after disappearance of OSF ring disappears when gradually decreasing a growth rate of silicon single crystal during pulling and a growth rate at a boundary where a high oxygen precipitation Nv region having a density of BMDs of 1×107 numbers/cm3 or more and/or a wafer lifetime of 30 μsec or less after oxygen precipitation treatment disappears when gradually decreasing the growth rate further. Thereby, there is provided a silicon single crystal which does not belong to any of V region rich in vacancy, OSF region and I region rich in interstitial silicon, and has excellent electrical characteristics and gettering capability, so that yield of devices can be surely improved, and also an epitaxial wafer.
摘要翻译:在通过Czochralski法制造单晶硅的方法中,通过控制在逐渐减小生长时OSF环消失后残留的Cu沉积检测到的缺陷区域的边界处的生长速度之间的生长速率生长单晶 拉伸时的硅单晶速率和BMD密度为1×10 7 / cm 3以上的高氧沉淀Nv区域的边界处的生长速度,以及 /或在氧沉淀处理后30微米或更小的晶片寿命在进一步降低生长速率时消失。 由此,提供了不属于富含空隙的V区,OSF区和富含间隙硅的I区的任何一种的硅单晶,并且具有优异的电特性和吸杂能力,从而可以可靠地提高器件的产量 ,以及外延晶片。
摘要:
There can be provided a silicon single crystal wafer grown according to Czochralski method wherein the whole plane of the wafer is occupied by N region on the outside of OSF generated in a shape of a ring by thermal oxidation treatment and there exists no defect region detected by Cu deposition. Thereby, there can be produced a silicon single crystal wafer according to CZ method, which does not belong to any of V region rich in vacancies, OSF region and I region rich in interstitial silicons, and can surely improve electric characteristics such as oxide dielectric breakdown voltage characteristics or the like under stable manufacture conditions.
摘要:
The present invention is a method for producing a single crystal of which a whole plane in a radial direction is a defect-free region with pulling the single crystal from a raw material melt in a chamber by Czochralski method, wherein a pulling condition is changed in a direction of the crystal growth axis during pulling the single crystal so that a margin of a pulling rate is always a predetermined value or more that the single crystal of which the whole plane in a radial direction is a defect-free region can be pulled. Thereby, there can be provided a method for producing a single crystal in which when a single crystal is produced by CZ method, the single crystal of which a whole plane in a radial direction is a defect-free region entirely in a direction of the crystal growth axis can be produced with stability.
摘要:
In a method for producing an SOI wafer comprising steps of implanting hydrogen ions etc. from a surface of a bond wafer 21 to form an ion-implanted layer 24 inside the wafer, bonding the ion-implanted surface of the bond wafer and a surface of a base wafer 22 via an oxide film 23 or directly, and forming an SOI wafer by delaminating a part of the bond wafer at the ion-implanted layer by heat treatment, wherein a silicon wafer consisting of silicon single crystal grown by Chochralski method, which is occupied by N region outside OSF generated in a ring shape and has no defect region detected by Cu deposition method, is used as the bond wafer. Thereby, even in the case of forming an extremely thin SOI layer 27 such that, for example, its thickness is 200 nm or less, there is provided an SOI wafer which has an excellent electric property without causing micro pits by cleaning with hydrofluoric acid etc., and in addition, can be produced without increasing the number of process.