摘要:
A method for manufacturing a silicon single crystal wafer, having at least: a step of preparing a silicon single crystal ingot; a step of slicing the silicon single crystal ingot to fabricate a plurality of sliced substrates; a processing step of processing the plurality of sliced substrates into a plurality of substrates by performing at least one of lapping, etching, and polishing; a step of sampling at least one from the plurality of substrates; a step of measuring surface roughness of the substrate sampled at the sampling step by an AFM and obtaining an amplitude (an intensity) of a frequency band corresponding to a wavelength of 20 nm to 50 nm to make a judgment of acceptance; and a step of sending the substrate to the next step if a judgment result is acceptance or performing reprocessing if the judgment result is rejection.
摘要:
In a manufacturing method of manufacturing a silicon on insulator (SOI) wafer, a single crystal silicon whose surface is an N region on an outer side of an OSF region, is grown and sliced to fabricate an N region single crystal silicon. An ion injection layer is formed within the N region single crystal silicon wafer by injecting a hydrogen ion or a rare gas ion from a surface of the N region single crystal silicon wafer; the ion injection surface of the N region single crystal silicon wafer and/or a surface of the transparent insulation substrate is processed using plasma and/or ozone. The ion injection surface is bonded to the surface of the transparent insulation substrate by bringing them into close contact with each other at room temperature. An SOI layer is formed by mechanically peeling the single crystal silicon wafer.
摘要:
The present invention provides a SOI wafer produced by an ion implantation delamination method wherein a width of a SOI island region in a terrace portion generated in an edge portion of the SOI wafer where a surface of a base wafer is exposed is narrower than 1 mm and a density of pit-shaped defects having a size of 0.19 μm or more existing in a surface of a SOI layer detected by a LPD inspection is 1 counts/cm2 or less, and also provides a method for producing the SOI wafer. Thereby, there is provided a SOI wafer produced by an ion implantation delamination method wherein generation of SOI islands generated in delamination can be suppressed and a defect density of LPDs existing in a surface of the SOI wafer can be reduced, and a method for producing the same, so that device failure can be reduced.
摘要翻译:本发明提供一种通过离子注入分层方法制造的SOI晶片,其中在SOI晶片的边缘部分中产生的露台部分中的SOI岛区域的宽度基底晶片暴露的距离窄于1mm, 存在于通过LPD检查检测的SOI层的表面中的具有0.19μm以上的尺寸的凹坑状缺陷的密度为1个/ cm 2以下,并且还提供了一种用于 生产SOI晶片。 因此,提供了通过离子注入分层方法制造的SOI晶片,其中可以抑制在分层中产生的SOI岛的产生,并且可以减少存在于SOI晶片的表面中的LPD的缺陷密度,以及制造 相同,从而可以减少设备故障。
摘要:
An embodiment of a multilayer wafer according to the invention includes a base substrate, a first layer associated with the base substrate, and a second layer on the first layer on side opposite from the base substrate in an axial direction and having a lateral edge. The first layer includes a ridge that protrudes axially and is disposed laterally adjacent the second layer measured in a direction normal to the axial direction for protecting the lateral edge. This ridge can surround portion the lateral edge in an axial cross-section for preventing edge falls. Also, the ridge can have an axial height greater than the axial thickness of the second layer. In one embodiment, the second layer includes an oxydizable semiconductor and the first layer includes an oxidized insulator.
摘要:
In a method for reclaiming a delaminated wafer produced as a by-product in the production of bonded wafer by the ion implantation and delamination method, at least ion-implanted layer on a chamfered portion of the delaminated wafer is removed, and then a surface of the wafer is polished. Specifically, at least a chamfered portion of the delaminated wafer is subjected to an etching treatment and/or processing by chamfering, and then a surface of the wafer is polished. Alternatively, the delaminated wafer is subjected to a heat treatment, and then polished. There are provided a method for reclaiming a delaminated wafer, which provides a reclaimed wafer of high quality that does not generate particles even when it is subjected to a heat treatment with good yield, and such a reclaimed wafer.
摘要:
A method for heat-treating an SOI wafer in a reducing atmosphere, wherein the SOI wafer is heat-treated through use of a rapid thermal annealer at a temperature within the range of 1100° C. to 1300° C. for 1 sec to 60 sec. The reducing atmosphere is preferably an atmosphere of 100% hydrogen or a mixed gas atmosphere containing hydrogen and argon. The heat treatment is preferably performed for 1 sec to 30 sec. The method eliminates COPs in an SOI layer of an SOI wafer in accordance with a hydrogen annealing method, while preventing etching of the SOI layer and a buried oxide layer.
摘要:
Proposed is an improvement in the process for the preparation of an SOI wafer comprising the steps of: forming an oxidized surface film on the mirror-polished surface of a first mirror-polished semiconductor silicon wafer as the base wafer; forming a doped layer with a dopant in a high concentration on the mirror-polished surface of a second mirror-polished semiconductor silicon wafer as the bond wafer; bringing the base wafer and the bond wafer into contact each with the other at the oxidized surface film and the doped layer; and subjecting the thus contacted semiconductor silicon wafers to a heat treatment to effect integral bonding thereof into a precursor of an SOI wafer. The improvement of the invention is accomplished by polishing the surface of the doped layer on the bond wafer before the base wafer and the bond wafer are joined by contacting at the oxidized surface film and the doped layer so that a great improvement can be obtained in the bonding strength between layers.