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    • 15. 发明授权
    • Method of preferentially etching a semiconductor substrate with respect
to epitaxial layers
    • 相对于外延层优先蚀刻半导体衬底的方法
    • US5756403A
    • 1998-05-26
    • US581233
    • 1995-12-29
    • Rudolf P. TijburgSharon J. FlamholtzKevin W. Haberern
    • Rudolf P. TijburgSharon J. FlamholtzKevin W. Haberern
    • C23F1/14H01L21/306H01L21/308H01L21/473H01L21/302
    • H01L21/30612H01L21/473
    • An etching composition and method for its use in etching a semiconductor structure, the semiconductor structure comprising a substrate and one or more epitaxial layers. The etching composition comprises a solvent, an etchant, and first and second complexing agents, the etchant and complexing agents being soluble in the solvent. The etchant preferentially etches the substrate with respect to at least one epitaxial layer. The first complexing agent is reactive with the substrate so as to accelerate the rate at which the etchant etches the substrate. The second completing agent is reactive with a component of the at least one epitaxial layer so as to form a resulting compound with the component. This reaction establishes an equilibrium between the resulting compound, the second complexing agent and the component, the equilibrium precluding significant etching of the at least one epitaxial layer. The etching composition preferably comprises an agent which provides for adjusting the acidity of the solution, and thereby provides for adjusting the etch rate of the substrate while maintaining the composition's etching characteristics with respect to the at least one epitaxial layer.
    • 一种用于蚀刻半导体结构的蚀刻组合物和方法,所述半导体结构包括衬底和一个或多个外延层。 蚀刻组合物包括溶剂,蚀刻剂和第一和第二络合剂,蚀刻剂和络合剂可溶于溶剂中。 蚀刻剂相对于至少一个外延层优先蚀刻衬底。 第一络合剂与衬底反应,以加速蚀刻剂蚀刻衬底的速率。 第二完成剂与至少一个外延层的组分反应,以便与组分形成所得化合物。 该反应在所得化合物,第二络合剂和组分之间建立平衡,排除了至少一个外延层的显着蚀刻的平衡。 蚀刻组合物优选包含提供溶液酸度的调节剂,从而提供调整衬底的蚀刻速率,同时保持组合物相对于至少一个外延层的蚀刻特性。
    • 16. 发明授权
    • Method of manufacturing a block-shaped support body for a semiconductor
component
    • 制造用于半导体部件的块状支撑体的方法
    • US5578866A
    • 1996-11-26
    • US115335
    • 1993-09-01
    • Johannes A. DePoorterRudolf P. TijburgHermanus A. Van De Pas
    • Johannes A. DePoorterRudolf P. TijburgHermanus A. Van De Pas
    • H01L23/36H01L25/16H01L33/62H01L33/64H01S5/00H01S5/02H01L23/544
    • H01L33/62H01L25/162H01S5/0201H01L2224/48091H01L2924/01014H01L2924/01078H01L2924/01079H01L2933/0033H01L33/642
    • In the known method, a plate of a heat-conducting material, for example silicon, is subdivided by means of grooves into blocks which remain connected to one another along break-off edges. The plate is metallized on two sides and (locally) provided with layer-shaped regions comprising solder at the upper side, the diode laser being fastened within each region, after which the blocks are separated from one another by breaking-off. A disadvantage of this method is that the blocks thus obtained are not suitable for a final mounting in which the radiation beam of the diode laser is perpendicular to the carrier plate on which the support body is fastened. In a method according to the invention, mutually parallel grooves are provided in the plate and the plate is subdivided into strips whose longitudinal direction is perpendicular to the direction of the grooves which are at most two support bodies wide and whose side surfaces are substantially smooth and flat, and the upper surface and the side surfaces of the strips are provided with a conductive layer in one step, after which the layer-shaped regions comprising solder are provided on one of these surfaces. This method is simple, comprises comparatively few steps, and results in a large number of interconnected support bodies which are suitable for mounting with the support body tilted through 90.degree.. This renders it possible to mount diode lasers on the support bodies before the latter are separated and to mount them finally relative to a carrier plate in such a way that the radiation beam is approximately perpendicular to the carrier plate. Preferably, strips having a width of exactly one support body are formed.
    • 在已知的方法中,导热材料(例如硅)的板通过凹槽细分成块,其沿断裂边保持彼此连接。 板在两面金属化并且(局部地)设置有在上侧包括焊料的层状区域,二极管激光器被紧固在每个区域内,之后块通过断开彼此分离。 该方法的缺点在于,如此获得的块不适用于其中二极管激光器的辐射束垂直于固定有支撑体的承载板的最终安装。 在根据本发明的方法中,在板中设置相互平行的槽,并且板被细分成条,其长度方向垂直于至多两个支撑体宽度的槽的方向,并且其侧表面基本上平滑, 平坦,并且条的上表面和侧表面在一个步骤中设置有导电层,之后在其中一个表面上设置包含焊料的层状区域。 该方法简单,包括较少的步骤,并且导致大量互连的支撑体,其适用于支撑体倾斜90°的安装。 这使得可以在支撑体分离之后将二极管激光器安装在支撑体上,并且最终相对于载板安装它们,使得辐射束大致垂直于载体板。 优选地,形成具有正好一个支撑体的宽度的条带。