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    • 2. 发明授权
    • Method of dielectric isolation to provide backside collector contact and scribing yield
    • 电介质隔离方法提供背面集电极接触和划线产量
    • US3911559A
    • 1975-10-14
    • US42363173
    • 1973-12-10
    • TEXAS INSTRUMENTS INC
    • BEAN KENNETH EAKRIDGE ALBERT NEAL
    • H01L21/00H01L21/74H01L21/762H01L21/764H01L29/00H01L29/04H01L21/304H01L21/306H01L21/36
    • H01L29/045H01L21/00H01L21/743H01L21/76264H01L21/76289H01L21/764H01L29/00Y10S148/028Y10S148/051Y10S148/085Y10S148/115Y10S148/122Y10S438/928Y10S438/977
    • The disclosure relates to a method in bipolar technology of providing a back contact to the collector of a semiconductor device through a dielectrically isolated circuit to reduce saturation resistance and to provide a continuous region of single crystal semiconductor material extending through the entire slice to provide scribe lines extending entirely through the single crystal material to provide much higher scribing yields. The above is provided by depositing an oxide layer over a single crystal substrate and selectively removing portions of the oxide which will later be either scribe points or be positioned beneath the collector of the transistor to be formed. Semiconductor material is then deposited over the oxide layer, this material depositing on the oxide layer and also on the silicon substrate in the region where the oxide has been removed. A buildup will be provided which is polycrystalline over the oxide layer and single crystal over the region wherein the deposited silicon is directly in contact with the silicon substrate. The silicon substrate is then ground and polished back and an epitaxial layer is then deposited thereon. In the case of the scribe lines, an oxide coating is then placed over the topmost semiconductor layer and portions of the oxide are removed over the scribe lines. An orientation dependent etch is then provided through the semiconductor material bound to the scribe lines. Normal scribing techniques could also be used to provide a relatively high yield as compared with the prior art along the scribe lines.
    • 本公开涉及一种双极技术中的方法,其通过介电隔离电路向半导体器件的集电极提供背接触以降低饱和电阻并提供延伸穿过整个切片的单晶半导体材料的连续区域,以提供划线 完全延伸通过单晶材料,以提供更高的划线产量。 通过在单晶衬底上沉积氧化物层并选择性地去除氧化物的部分,这将随后被刻划或者被放置在待形成的晶体管的集电极之下来提供上述。 然后将半导体材料沉积在氧化物层上,该材料沉积在氧化物层上,并且在氧化物被去除的区域中沉积在硅衬底上。 将提供在氧化物层和在其上沉积的硅直接与硅衬底接触的区域上的单晶多晶的堆积。 然后将硅衬底研磨并抛光,然后在其上沉积外延层。 在划线的情况下,然后将氧化物涂层放置在最上面的半导体层上,并且氧化物的部分在划线上被去除。 然后通过结合到划线的半导体材料提供取向相关的蚀刻。 与沿着划线的现有技术相比,正常划线技术也可以用于提供相对高的产量。
    • 3. 发明授权
    • Bipolar integrated circuit and method
    • 双极集成电路和方法
    • US3878552A
    • 1975-04-15
    • US30598372
    • 1972-11-13
    • RODGERS THURMAN J
    • RODGERS THURMAN J
    • H01L21/764H01L21/8222H01L27/00H01L29/06H01L19/00
    • H01L29/0661H01L21/764H01L21/8222H01L27/00Y10S148/007Y10S148/025Y10S148/051Y10S148/085Y10S148/115Y10S148/138Y10S148/139Y10S148/168
    • An integrated circuit formed from starting material including a highly doped substrate of one conductivity type having crystallographic planes at one face thereof which etch preferentially, such as the or planes, and three layers of semiconductor material on said one face, said layers comprising in order a lightly doped or intrinsic layer, a highly doped buried layer and another layer all of opposite conductivity type with a V-groove extending through said layers and into said substrate to define an island and a well within said island extending to a point adjacent said highly doped buried layer and a diffusion region formed in said well to provide connection to the buried layer together with additional regions formed in said island to define with said layers a bipolar semiconductor device. The method of forming bipolar semiconductor devices in integrated circuits which comprises processing a wafer including crystallographic planes at one face thereof which etch preferentially, such as the or planes, and three layers of semiconductor material on said one face, said layers comprising in order a lightly doped or intrinsic layer, a highly doped buried layer and another layer of opposite conductivity type, masking the surface of the device to form a ring of predetermined width and an opening of predetermined size within said ring and thereafter etching to form a groove extending into the substrate and a well extending adjacent the highly doped buried layer and forming a diffusion region at the surface of the well to provide connection to the highly doped buried layer and additional steps of forming various regions to define bipolar semiconductor devices within said groove.
    • 由起始材料形成的集成电路包括一种具有一种导电类型的高度掺杂的衬底,其一面具有优先刻蚀的诸如100或110平面的结晶面以及所述一个面上的三层半导体材料, 所述层包括轻掺杂或本征层,高度掺杂的掩埋层和全部具有相反导电类型的另一层,其中V沟槽延伸穿过所述层并进入所述衬底,以在所述岛内限定岛和井,延伸到 邻近所述高掺杂掩埋层的点和在所述阱中形成的扩散区域,以与形成在所述岛中的附加区域一起提供与掩埋层的连接,以与所述层形成双极半导体器件。
    • 7. 发明授权
    • Precision etching of semiconductors
    • 精密蚀刻半导体
    • US3765969A
    • 1973-10-16
    • US3765969D
    • 1970-07-13
    • BELL TELEPHONE LABOR INC
    • KRAGNESS RWAGENER H
    • G02B6/36H01L21/00H01L21/306H01L7/00C09K3/00G03C5/00
    • H01L21/30608G02B6/3692H01L21/00Y10S148/051Y10S148/085Y10S148/102Y10S148/115Y10S148/118
    • A method of precision etching for semiconductor device fabrication using the preferential characteristics of certain etchants for particular crystallographic planes of monocrystalline material. In particular, silicon is precisely etched by disposing etch masks on surfaces parallel to the (100) plane with the mask edges parallel to the lines of intersection of the (111) planes with the (100) plane, and using alkali hydroxide etches as well as certain organic reagents, which have substantially lower etch rates with respect to the (110) and (111) planes. Also, undercutting at intersections of the mask boundaries which expose the (110) plane is avoided by shaping the mask to compensate therefor. A suitable etchant formulation contains 50 parts by volume of water, 15 parts by volume of npropanol and has molar concentration of hydroxide of about 5.3.
    • 一种用于半导体器件制造的精密蚀刻方法,其使用某些特定蚀刻剂对于单晶材料的特定晶面的优先特性。 特别地,通过在与(100)平面平行的表面上设置蚀刻掩模来精确地蚀刻硅,掩模边缘平行于(111)面与(100)面的相交线,以及使用碱金属氢氧化物蚀刻 作为某些有机试剂,其相对于(110)和(111)面具有相当低的蚀刻速率。 此外,通过对掩模进行成形来补偿曝光(110)面的掩模边界的交点处,可以避免底切。 合适的蚀刻剂配方含有50体积份的水,15体积份的正丙醇,并且氢氧化物的摩尔浓度为约5.3。