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    • 54. 发明授权
    • Semiconductor memory device and method for fabricating the same
    • 半导体存储器件及其制造方法
    • US06238966B1
    • 2001-05-29
    • US09379857
    • 1999-08-24
    • Michihito UedaTakashi Ohtsuka
    • Michihito UedaTakashi Ohtsuka
    • H01L2972
    • H01L28/56
    • A low-leakage-current layer, made of BST in which the content of Ti deviates from its stoichiometric composition, is interposed between a high-dielectric-constant layer, made of BST with the stoichiometric composition, and an upper electrode. And a charge-storable dielectric film is made up of the high-dielectric-constant layer and the low-leakage-current layer. Such a BST film containing a larger number of Ti atoms than that defined by stoichiometry can suppress the leakage current to a larger degree. Also, if such a film is used, then the relative dielectric constant does not decrease so much as a BST film with the stoichiometric composition. Accordingly, the leakage current can be suppressed while minimizing the decrease in relative dielectric constant of the entire charge-storable dielectric film, which is a serial connection of capacitors, thus contributing to the downsizing of a semiconductor memory device. As a result, a semiconductor memory device, including a charge-storable dielectric film with decreased leakage current and enhanced charge storability, can be obtained.
    • 由BST的含量偏离其化学计量组成的BST制成的低漏电流层插入由具有化学计量组成的BST制成的高介电常数层和上电极之间。 并且电荷存储电介质膜由高介电常数层和低漏电流层构成。 这样含有比化学计量定义的Ti原子数更多的BST膜可以更大程度地抑制漏电流。 此外,如果使用这样的膜,则相对介电常数不会像具有化学计量组成的BST膜那么多地降低。 因此,可以抑制泄漏电流,同时最小化作为电容器的串联连接的整个电荷存储电介质膜的相对介电常数的降低,从而有助于半导体存储器件的小型化。 结果,可以获得包括具有降低的漏电流和增强的电荷存储性的电荷存储电介质膜的半导体存储器件。
    • 58. 发明授权
    • Video cassette auto changer
    • 录像带自动更换
    • US4802035A
    • 1989-01-31
    • US38311
    • 1987-04-14
    • Takashi Ohtsuka
    • Takashi Ohtsuka
    • G11B15/68
    • G11B15/6835
    • An automatic cassette loading and transferring apparatus for use with at least one reproducing unit which is arranged between two housing blocks adjacent the reproducing unit, in which the housing blocks each hold a plurality of cassettes. The cassette transfer device has inlets facing the two cassette housing blocks for transferring the cassettes back and forth between the blocks, as well as to the reproducing unit. The cassette transferring device has at least one cassette receiving portion formed therein with two inlets and includes transport means capable of carrying in and carrying out a cassette from both of the cassette receiving portions in either direction and includes a cassette push-out element used to push out a cassette housed in each of the receiving portions in either the forward or rear facing directions relative to the two cassette housing blocks. A bar code detector is provided on a movable mounting for scanning an identification code on a cassette and is also movable to either inlet entrance of the cassette receiving portion to accommodate cassettes entering from either side.
    • 一种用于与至少一个再现单元一起使用的自动盒式磁带装载和传送装置,所述再现单元布置在与再现单元相邻的两个壳体块之间,其中壳体块各自容纳多个盒。 盒式传送装置具有面向两个盒壳体块的入口,用于在盒之间来回传送盒以及再现单元。 盒式传送装置具有形成有两个入口的至少一个盒接收部分,并且包括能够从两个盒接收部分沿任一方向承载和执行盒的传送装置,并且包括用于推动的盒推出元件 在相对于两个盒壳体块的前进或后退方向上,收纳在每个接收部分中的盒。 条形码检测器设置在用于扫描盒上的识别码的可移动安装件上,并且还可移动到盒接收部分的任一入口入口以适应从两侧进入的盒。