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    • 2. 发明授权
    • Compound semiconductor crystal growing method
    • 化合物半导体晶体生长方法
    • US5296088A
    • 1994-03-22
    • US924483
    • 1992-08-04
    • Kunihiko KodamaNobuyuki OhtsukaMasashi OzekiYoshiki Sakuma
    • Kunihiko KodamaNobuyuki OhtsukaMasashi OzekiYoshiki Sakuma
    • C30B25/02H01L21/203
    • C30B25/02C30B29/40Y10S148/057
    • A compound semiconductor crystal growing method includes the steps of (a) setting a substrate having a substrate surface in a reaction chamber, and (b) supplying a material gas of a compound semiconductor which is to be grown in the form of a crystal on the substrate surface within the reaction chamber and a control gas to the reaction chamber under a predetermined condition, and controlling the supply of the control gas to control an adsorption rate of the material gas on the substrate surface. The control gas makes competitive adsorption with the material gas on the substrate surface but makes no chemical reaction such that no continual accumulation on the substrate surface occurs under the predetermined condition. The competitive adsorption is defined as a phenomenon in which the material gas and the control gas compete and become adsorped on the substrate surface.
    • 化合物半导体晶体生长方法包括以下步骤:(a)在反应室中设置具有基板表面的基板,(b)将待生长在晶体形式的化合物半导体的材料气体 反应室内的基板表面和在预定条件下到达反应室的控制气体,并且控制控制气体的供应以控制材料气体在基板表面上的吸附速率。 控制气体与衬底表面上的材料气体进行竞争性吸附,但不发生化学反应,使得在预定条件下不会在衬底表面上发生持续的积累。 竞争性吸附被定义为材料气体和对照气体在衬底表面上竞争并被吸附的现象。
    • 3. 发明授权
    • Quantum semiconductor device with triangular etch pit
    • 具有三角蚀刻坑的量子半导体器件
    • US5656821A
    • 1997-08-12
    • US568124
    • 1995-12-06
    • Yoshiki Sakuma
    • Yoshiki Sakuma
    • H01L29/12H01S5/02H01S5/32H01S5/34H01L29/06H01L31/0328H01L31/0336
    • B82Y20/00B82Y10/00H01L29/122H01L29/125H01L29/127H01S5/3203H01S5/3412Y10S438/911
    • A semiconductor device is provided, including a semiconductor substrate of zinc blend structure, defined by a principal surface substantially coinciding to a {111}A-oriented crystal surface; an etch pit of the shape of a triangular pyramid, formed on the principal surface of the substrate, the etch pit being defined by side walls merging at an apex of said triangular pyramid, each two of the side walls merging at a valley of the triangular pyramid; and an active part formed on the etch pit; wherein the active part includes a quantum well layer having a first bandgap and provided along the side walls of the etch pit, and a pair of barrier layers having a second, larger bandgap and provided so as to sandwich the quantum well layer. According to the present invention, the quantum semiconductor device includes a quantum box at the apex of the triangular pyramid and quantum wires at the three valleys of the triangular pyramid, in addition to the one-dimensionally confined quantum wells formed by the quantum well layer in correspondence to each of the side walls of the triangular pyramid. By using the quantum box, quantum wires or quantum wells, the device of the present invention can perform various functions.
    • 提供一种半导体器件,包括由与{111} A取向晶体表面基本一致的主表面限定的锌共混结构的半导体衬底; 形成在基板的主表面上的三角锥形状的蚀刻坑,蚀刻坑由在三角锥的顶点处汇合的侧壁限定,每个两个侧壁在三角形的谷部处合并 金字塔; 以及形成在蚀刻坑上的有源部分; 其中所述有源部分包括具有第一带隙并沿着所述蚀刻坑的侧壁设置的量子阱层以及具有第二较大带隙并且被设置为夹着所述量子阱层的一对势垒层。 根据本发明,除了由量子阱层形成的一维限制的量子阱之外,量子半导体器件还包括三角锥顶点处的量子箱和三角锥三角的三个量子线 对应于三角锥体的每个侧壁。 通过使用量子箱,量子线或量子阱,本发明的装置可以执行各种功能。