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    • 1. 发明申请
    • METHOD OF MANUFACTURING SEMICONDUCTOR WAFER, AND COMPOSITE BASE AND COMPOSITE SUBSTRATE FOR USE IN THAT METHOD
    • 制造半导体波形的方法以及用于该方法的复合基底和复合基板
    • US20120228613A1
    • 2012-09-13
    • US13107286
    • 2011-05-13
    • Yuki SEKIIssei SatohKoji UematsuYoshiyuki Yamamoto
    • Yuki SEKIIssei SatohKoji UematsuYoshiyuki Yamamoto
    • H01L29/04B32B3/00H01L27/12H01L29/02H01L21/762H01L29/22
    • H01L29/0684B32B2264/102B32B2307/704B32B2457/14H01L21/76254
    • A method of manufacturing a semiconductor wafer of the present invention includes the steps of: obtaining a composite base by forming a base surface flattening layer having a surface RMS roughness of not more than 1.0 nm on a base; obtaining a composite substrate by attaching a semiconductor crystal layer to a side of the composite base where the base surface flattening layer is located; growing at least one semiconductor layer on the semiconductor crystal layer of the composite substrate; and obtaining the semiconductor wafer including the semiconductor crystal layer and the semiconductor layer by removing the base surface flattening layer by wet etching and thereby separating the semiconductor crystal layer from the base. Thus, a method of manufacturing a semiconductor wafer capable of efficiently manufacturing the semiconductor wafer regardless of the type of a base, and a composite base and a composite substrate suitably used in that manufacturing method are provided to efficiently manufacture a semiconductor device.
    • 本发明的制造半导体晶片的方法包括以下步骤:通过在基底上形成表面RMS粗糙度不大于1.0nm的基面平坦化层来获得复合基底; 通过将半导体晶体层附着到所述复合基底的所述基面平坦化层所在的一侧来获得复合基板; 在复合衬底的半导体晶体层上生长至少一个半导体层; 以及通过湿法蚀刻去除基底表面平坦化层,从而将半导体晶体层与基底分离,从而获得包括半导体晶体层和半导体层的半导体晶片。 因此,提供一种制造半导体晶片的方法,而不管基底的类型如何,以及适用于该制造方法的复合基底和复合基底都能有效地制造半导体晶片,以有效地制造半导体器件。
    • 8. 发明申请
    • COMPOUND SEMICONDUCTOR DEVICE
    • 化合物半导体器件
    • US20110108853A1
    • 2011-05-12
    • US12835003
    • 2010-07-13
    • Masahiro ADACHIShinji TokuyamaKoji Katayama
    • Masahiro ADACHIShinji TokuyamaKoji Katayama
    • H01L29/24H01L29/20
    • H01L33/40H01L33/32H01L33/34
    • A compound semiconductor device having reduced contact resistance to an electrode is provided. The compound semiconductor device includes an n-substrate 3 comprising a hexagonal compound semiconductor GaN and having surfaces S1 and S2; an n-electrode 13 formed on the surface S1 of the n-substrate 3; a layered product having an n-cladding layer 5, an active layer 7, a p-cladding layer 9, and a contact layer 11 formed on the surface S2 of the n-substrate 3; and a p-electrode 15 formed on the p-cladding layer 9. The number of N atoms contained on the surface S1 of the n-substrate 3 is more than the number of Ga atoms contained on the surface S1. The electrode formed on the surface S1 is an n-electrode 13. The surface S1 has an oxygen concentration of not more than 5 atomic percent. The number of Ga atoms contained on the surface S3 of the contact layer 11 is more than the number of N atoms contained on the surface S3. The electrode formed on the surface S3 is a p-electrode 15. The surface S3 has an oxygen concentration of not more than 5 atomic percent.
    • 提供具有降低的与电极的接触电阻的化合物半导体器件。 该化合物半导体器件包括包含六方晶系化合物半导体GaN并具有表面S1和S2的n衬底3; 形成在n基板3的表面S1上的n电极13; 具有形成在n基板3的表面S2上的n包层5,有源层7,p包覆层9和接触层11的层叠体, 以及形成在p包覆层9上的p电极15.包含在n基板3的表面S1上的N原子的数量大于表面S1上包含的Ga原子的数量。 形成在表面S1上的电极是n电极13.表面S1的氧浓度不大于5原子%。 接触层11的表面S3上所含的Ga原子数多于表面S3所含的N原子数。 形成在表面S3上的电极是p电极15.表面S3的氧浓度不大于5原子%。