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    • 4. 发明授权
    • Method of forming semimicron grooves in semiconductor material
    • 在半导体材料中形成半圆形槽的方法
    • US4717689A
    • 1988-01-05
    • US776330
    • 1985-09-16
    • Henricus G. R. MaasJohannes A. Appels
    • Henricus G. R. MaasJohannes A. Appels
    • H01L21/302H01L21/033H01L21/3065H01L21/762H01L21/76
    • H01L21/033H01L21/762Y10S438/947
    • On a layer having a stepped relief, such as a masking layer (4) having openings (5) on a substrate region, (2) a first layer (6) is provided, which, while maintaining the stepped relief, is covered by a second masking layer (8) and a convertible layer (9). By conversion of the convertible layer (9) (by means of ion implantation, oxidation, silicidation) this layer becomes selectively etchable. After removal of the non-converted parts, an intermediate mask (8) is formed with an opening in the second masking layer (8) along the edge of a depression (7). By means of the mask (8) thus obtained, grooves (11) are formed by anisotropic etching in the first layer (6) and in the subjacent substrate region (2) if required. When grooves are formed in a substrate region (2) of semiconductor material, these grooves may be filled with oxide (25) for forming insulated regions. If a first layer (6) of polycrystalline silicon is used on a substrate region (2) of silicon, this layer (6) can serve as a doping source and a connection, respectively. Thus, various kinds of transistors (MOSFET and bipolar transistors) can be manufactured. The second masking layer (8) and the convertible layer (9) may be realized, if required, as a single layer (65).
    • 在具有阶梯式浮雕的层上,例如在基板区域上具有开口(5)的掩模层(4),(2)第一层(6),其在保持阶梯式浮雕的同时被 第二掩模层(8)和可转换层(9)。 通过可转换层(9)(通过离子注入,氧化,硅化)的转化,该层变得可选择性地蚀刻。 在去除未转换部件之后,沿着凹部(7)的边缘,在第二掩模层(8)中形成具有开口的中间掩模(8)。 通过如此获得的掩模(8),如果需要,在第一层(6)和下层衬底区域(2)中通过各向异性蚀刻形成凹槽(11)。 当在半导体材料的衬底区域(2)中形成沟槽时,这些沟槽可以填充用于形成绝缘区域的氧化物(25)。 如果在硅的衬底区域(2)上使用多晶硅的第一层(6),则该层(6)可以分别用作掺杂源和连接。 因此,可以制造各种晶体管(MOSFET和双极晶体管)。 如果需要,可以将第二掩蔽层(8)和可转换层(9)实现为单层(65)。
    • 7. 发明授权
    • Method of manufacturing a semiconductor device and semiconductor device
manufactured by means of the method
    • 通过该方法制造的半导体器件和半导体器件的制造方法
    • US4659428A
    • 1987-04-21
    • US840164
    • 1986-03-17
    • Henricus G. R. MaasJohannes A. Appels
    • Henricus G. R. MaasJohannes A. Appels
    • H01L29/762H01L21/033H01L21/308H01L21/321H01L21/331H01L21/339H01L29/73H01L29/732H01L29/76H01L29/772H01L21/306
    • H01L29/66954H01L21/033H01L21/308H01L21/321Y10S438/911Y10S438/981
    • An improved method of manufacturing a semiconductor device having a narrow groove or slot is provided. There are formed on a substrate a heavily n-doped first silicon layer, an oxidation-preventing layer such as silicon nitride, and a weakly doped or undoped second silicon layer. By means of a single masking step, a part of the second silicon layer is removed, and the remaining part is partially oxidized. The exposed portion of the oxidation-preventing layer is removed without a further masking step by using the oxidized remaining parts of the second silicon layer. Subsequently, the oxide on the second silicon layer is removed. By thermal oxidation, a thin oxide layer is formed on the second silicon layer and an about ten times thicker oxide layer is formed on the first silicon layer. After the exposed oxidation-preventing layer has been etched away, the oxide on the second silicon layer is etched away entirely, and the oxide on the first silicon layer is etched away only superficially. After this, a groove is etched at the removed portions of the exposed oxidation-preventing layer while simultaneously removing the remaining parts of the second silicon layer.
    • 提供了一种制造具有窄槽或槽的半导体器件的改进方法。 在衬底上形成了大量n掺杂的第一硅层,诸如氮化硅的防氧化层,以及弱掺杂或未掺杂的第二硅层。 通过单个掩蔽步骤,去除第二硅层的一部分,并且剩余部分被部分氧化。 通过使用第二硅层的氧化剩余部分,不再进一步掩蔽步骤去除防氧化层的暴露部分。 随后,去除第二硅层上的氧化物。 通过热氧化,在第二硅层上形成薄的氧化物层,并且在第一硅层上形成约十倍厚的氧化物层。 在暴露的氧化防止层被蚀刻掉之后,第二硅层上的氧化物被完全蚀刻掉,并且仅在表面上蚀刻第一硅层上的氧化物。 之后,在暴露的氧化防止层的去除部分处蚀刻凹槽,同时去除第二硅层的剩余部分。
    • 9. 发明授权
    • Method of providing a narrow groove or slot in a substrate region, in
particular a semiconductor substrate region
    • 在衬底区域,特别是半导体衬底区域中提供窄槽或槽的方法
    • US4449287A
    • 1984-05-22
    • US447844
    • 1982-12-08
    • Henricus G. R. MaasJohannes A. Appels
    • Henricus G. R. MaasJohannes A. Appels
    • H01L21/306G03F7/11H01G4/10H01G13/00H01L21/033H01L21/302H01L21/3065H01L21/308H01L21/331H01L21/336H01L21/339H01L21/76H01L29/73H01L29/76H01L29/772H01L29/78
    • H01L29/66954G03F7/11H01G13/00H01L21/033H01L21/308Y10S438/911Y10S438/947
    • According to the invention, at least one oxidation-preventing layer (2) is provided on the substrate region (1), while on this layer there is provided an oxidizable layer (3). The oxidizable layer (3) is removed above part of the substrate region (1). An edge portion (5) of the oxidizable layer (3) is oxidized. Subsequently, at least the uncovered part of the oxidation-preventing layer (2) is removed selectively and the exposed part of the substrate region is thermally oxidized through part of its thickness, while practically only at the area of the oxidized edge portion (5) the substrate region (1) is exposed and is etched away through at least part of its thickness in order to form a groove (8), the oxidizable layer (3) and the oxidized edge portion (5) being removed completely. The substrate region may be a mono- or polycrystalline silicon layer. The oxidizable layer may consist of for instance polycrystalline silicon and may be coated with a second oxidation-preventing layer (4). If the substrate region is a masking layer, the slots provided therein may be used for doping purposes, for example, for forming channel stoppers, etc.Application in particular for the manufacture of integrated circuits and of gate electrodes spaced apart by very small distances in IGFET and CCD structures.FIG. 9 is suitable for abridgment.
    • 根据本发明,在基板区域(1)上设置至少一个氧化防止层(2),而在该层上设置有可氧化层(3)。 可氧化层(3)在衬底区域(1)的一部分上方被去除。 可氧化层(3)的边缘部分(5)被氧化。 随后,选择性地去除防氧化层(2)的至少未覆盖部分,并且基板区域的暴露部分被部分厚度热氧化,实际上仅在氧化边缘部分(5)的区域处, 衬底区域(1)被暴露并且通过其厚度的至少一部分被蚀刻掉以形成凹槽(8),可氧化层(3)和氧化边缘部分(5)被完全去除。 衬底区域可以是单晶硅或多晶硅层。 可氧化层可以由例如多晶硅组成,并且可以用第二防氧化层(4)涂覆。 如果衬底区域是掩模层,则其中提供的槽可以用于掺杂目的,例如用于形成通道阻挡器等。特别地用于制造集成电路和以非常小的距离隔开的栅电极的制造 IGFET和CCD结构。 图。 9适合于缓解。