摘要:
A semiconductor substrate useful as a donor wafer is a single-crystal silicon wafer having a relaxed, single-crystal layer containing silicon and germanium on its surface, the germanium content at the surface of the layer being in the range from 10% by weight to 100% by weight, and a layer of periodically arranged cavities below the surface. The invention also relates to a process for producing this semiconductor substrate and to an sSOI wafer produced from this semiconductor substrate.
摘要:
An SOI wafer is constructed from a carrier wafer and a monocrystalline silicon layer having a thickness of less than 500 nm, an excess of interstitial silicon atoms prevailing in the entire volume of the silicon layer. The SOI wafers may be prepared by Czochralski silicon single crystal growth, the condition v/G
摘要翻译:SOI晶片由载体晶片和厚度小于500nm的单晶硅层构成,在硅层的整个体积中存在过量的间隙硅原子。 SOI晶片可以通过Czochralski硅单晶生长制备,条件v / G <(V / G) SUB> = 1.3×10 -3 cm 2 在整个晶体截面上在结晶前沿实现/SUP>/(K.min),结果产生的硅单晶中存在过量的间隙硅原子; 从该硅单晶分离至少一个施主晶片,将施主晶片与载体晶片的接合以及施主晶片的厚度减小,结果是厚度小于500nm的硅层与 载体晶片残留。
摘要:
Silicon carbide substrate wafers are prepared by transferring a monocrystalline silicon layer from a donor wafer onto a handle wafer, the silicon layer being implanted with carbon and annealed to form a monocrystalline SiC layer prior to or after transfer of the silicon layer.
摘要:
To reduce and homogenize the thickness of a semiconductor layer which lies on the surface of an electrically insulating material, the surface of the semiconductor layer is exposed to the action of an etchant whose redox potential is adjusted as a function of the material and the desired final thickness of the semiconductor layer, so that the material erosion per unit time on the surface of the semiconductor layer due to the etchant becomes less as the thickness of the semiconductor layer decreases, and is only from 0 to 10% of the thickness per second when the desired thickness is reached. The method is carried out without the action of light or the application of an external electrical voltage.
摘要:
An SOI wafer is constructed from a carrier wafer and a monocrystalline silicon layer having a thickness of less than 500 nm, an excess of interstitial silicon atoms prevailing in the entire volume of the silicon layer. The SOI wafers may be prepared by Czochralski silicon single crystal growth, the condition v/G
摘要翻译:SOI晶片由载体晶片和厚度小于500nm的单晶硅层构成,在硅层的整个体积中存在过量的间隙硅原子。 SOI晶片可以通过Czochralski硅单晶生长制备,条件v / G <(V / G) SUB> = 1.3×10 -3 cm 2 在整个晶体截面上在结晶前沿实现/SUP>/(K.min),结果产生的硅单晶中存在过量的间隙硅原子; 从该硅单晶分离至少一个施主晶片,将施主晶片与载体晶片的接合以及施主晶片的厚度减小,结果是厚度小于500nm的硅层与 载体晶片残留。
摘要:
An SOI wafer is constructed from a carrier wafer and a monocrystalline silicon layer having a thickness of less than 500 nm, an excess of interstitial silicon atoms prevailing in the entire volume of the silicon layer. The SOI wafers may be prepared by Czochralski silicon single crystal growth, the condition v/G
摘要翻译:SOI晶片由载体晶片和厚度小于500nm的单晶硅层构成,在硅层的整个体积中存在过量的间隙硅原子。 可以通过Czochralski硅单晶生长制备SOI晶片,在整个晶体截面处在结晶前沿满足条件v / G <(v / G)crit = 1.3×10 -3 cm 2 /(K·min) ,结果是在所生成的硅单晶中存在过量的间隙硅原子; 从该硅单晶分离至少一个施主晶片,将施主晶片与载体晶片的接合以及施主晶片的厚度的减小,结果是厚度小于500nm的硅层与 载体晶片残留。
摘要:
The invention relates to a process for manufacturing a multilayered semiconductor wafer comprising a handle wafer (5) and a layer (40) comprising silicon carbide bonded to the handle wafer (5), the process comprising the steps of: a) providing a handle wafer (5), b) providing a donor wafer (1) comprising a donor layer (2) and a remainder (3) of the donor wafer, the donor layer (2) comprising monocrystalline silicon, e) bonding the donor layer (2) of the donor wafer (1) to the handle wafer (5), and f) removing the remainder (3) of the donor wafer in order to expose the donor layer (2) which remains bonded to the handle wafer (5), the process being characterized by further steps of c) implanting carbon ions into the donor layer (2) in order to produce a layer (4) comprising implanted carbon, and d) heat-treating the donor layer (2) comprising the layer (4) comprising implanted carbon in order to form a silicon carbide donor layer (44) in at least part of the donor layer (2). The invention also relates to a multilayered semiconductor wafer comprising a handle wafer (5) and a silicon carbide donor layer (44) which is bonded to the handle wafer (5), wherein the silicon carbide donor layer (44) is free of twins and free of additional silicon carbide polytypes, as determined by X-ray diffraction.
摘要:
A process for producing a semiconductor substrate comprising a carrier wafer and a layer of single-crystalline semiconductor material:a) producing a layer containing recesses at the surface of a donor wafer of single-crystalline semiconductor material,b) joining the surface of the donor wafer containing recesses to the carrier wafer,c) heat treating to close the recesses at the interface between the carrier wafer and the donor wafer to form a layer of cavities within the donor wafer, andd) splitting the donor wafer along the layer of cavities, resulting in a layer of semiconductor material on the carrier wafer. Semiconductor substrates prepared thusly may have a single-crystalline semiconductor layer having a thickness of 100 nm or less, a layer thickness uniformity of 5% or less, and an HF defect density of 0.02/cm2 or less.
摘要翻译:一种制造半导体衬底的方法,包括载体晶片和单晶半导体材料层:a)在单晶半导体材料的施主晶片的表面上产生包含凹陷的层,b)将所述供体的表面 晶片容纳凹槽到载体晶片,c)热处理以关闭在载体晶片和施主晶片之间的界面处的凹槽,以在施主晶片内形成一层空腔,以及d)沿着该空腔层分裂供体晶片 ,从而在载体晶片上产生一层半导体材料。 因此制备的半导体衬底可以具有厚度为100nm以下,层厚均匀度为5%以下,HF缺陷密度为0.02 / cm 2以下的单晶半导体层。
摘要:
Treatment of a semiconductor wafer employs: a) position-dependent measuring of a parameter characterizing the semiconductor wafer to determine a position-dependent value of the parameter over an entire surface of the semiconductor wafer, b) oxidizing the entire surface of the semiconductor wafer under the action of an oxidizing agent with simultaneous exposure of the entire surface, the oxidation rate and thus the thickness of the resulting oxide layer dependent on the light intensity at the surface of the semiconductor wafer, and c) removing of the oxide layer, the light intensity in step b) predefined in a position-dependent manner such that differences in the position-dependent values of the parameter measured are reduced by the position-dependent oxidation rate resulting in step b) and subsequent removal of the oxide layer in step c).
摘要:
A semiconductor substrate useful as a donor wafer is a single-crystal silicon wafer having a relaxed, single-crystal layer containing silicon and germanium on its surface, the germanium content at the surface of the layer being in the range from 10% by weight to 100% by weight, and a layer of periodically arranged cavities below the surface. The invention also relates to a process for producing this semiconductor substrate and to an sSOI wafer produced from this semiconductor substrate.