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    • 22. 发明专利
    • Heterojunction field effect transistor and method for manufacturing the same
    • 异相场效应晶体管及其制造方法
    • JP2012174825A
    • 2012-09-10
    • JP2011034194
    • 2011-02-21
    • Mitsubishi Electric Corp三菱電機株式会社
    • SHIOZAWA KATSUOMISUITA MUNEYOSHINANJO TAKUMASUZUKI YOSUKEIMAI AKIFUMIABE YUJIYAGYU EIJI
    • H01L21/338H01L21/225H01L21/28H01L29/417H01L29/778H01L29/812
    • PROBLEM TO BE SOLVED: To provide: a heterojunction field effect transistor (FET) having low resistance and capable of performing high-speed operation, without causing deterioration in withstand voltage characteristics and an increase in a gate leakage current; and a method for manufacturing the FET.SOLUTION: A method for manufacturing a heterojunction FET includes: (a) a step of preparing a channel layer 3 and a barrier layer 4 formed on the channel layer 3, as a nitride semiconductor layer; (b) a step of forming a ZnO film 9 on the nitride semiconductor layer as an impurity diffusion source; (c) a step of forming an oxide film 10 in a region other than a region where a drain electrode 6 and a source electrode 5 are to be formed, on the ZnO film 9; (d) a step of subjecting the nitride semiconductor layer to heat treatment so that Zn and O are selectively diffused from the ZnO film 9 into the channel layer 3 and the barrier layer 4 below a region where the oxide film 10 is not formed.
    • 要解决的问题:提供:具有低电阻并且能够执行高速操作的异质结场效应晶体管(FET),而不会导致耐压特性的劣化和栅极漏电流的增加; 以及制造该FET的方法。 解决方案:异质结FET的制造方法包括:(a)制备沟道层3和形成在沟道层3上的势垒层4作为氮化物半导体层的步骤; (b)在氮化物半导体层上形成作为杂质扩散源的ZnO膜9的工序; (c)在ZnO膜9上形成除了形成漏电极6和源电极5的区域以外的区域中形成氧化膜10的工序; (d)对氮化物半导体层进行热处理以使Zn和O从ZnO膜9选择性地扩散到沟道层3和势垒层4的未形成氧化膜10的区域以下的步骤。 版权所有(C)2012,JPO&INPIT
    • 23. 发明专利
    • Semiconductor device and method of manufacturing the same
    • 半导体器件及其制造方法
    • JP2011233612A
    • 2011-11-17
    • JP2010100554
    • 2010-04-26
    • Mitsubishi Electric Corp三菱電機株式会社
    • SUITA MUNEYOSHIIMAI AKIFUMINANJO TAKUMASHIOZAWA KATSUOMIABE YUJI
    • H01L21/338H01L21/28H01L29/417H01L29/778H01L29/812
    • PROBLEM TO BE SOLVED: To provide a semiconductor device capable of improving withstand voltage and preventing short channel effect, and to provide a method of manufacturing the same.SOLUTION: The semiconductor device comprises: a buffer layer 2 formed on an SiC substrate 1 that is a semiconductor substrate; a channel layer 3 having a smaller band gap than the buffer layer 2, which is formed on the buffer layer 2; a barrier layer 4 having a larger band gap than the channel layer 3, which is formed on the channel layer 3; a source and a drain electrode 7 and 8 separately formed each other on the barrier layer 4; and an impurity region 5 extending from a bottom surface of the source and the drain electrode 7 and 8 to within the channel layer 3 through the barrier layer 4. The bottom edge of the impurity region 5 does not reach the buffer layer 2.
    • 要解决的问题:提供能够提高耐受电压并防止短沟道效应的半导体器件,并提供其制造方法。 解决方案:半导体器件包括:形成在作为半导体衬底的SiC衬底1上的缓冲层2; 与形成在缓冲层2上的缓冲层2的带隙比较小的沟道层3; 在通道层3上形成的沟道层3具有比带隙大的阻挡层4; 在阻挡层4上分别形成的源极和漏极电极7和8; 以及从源极和漏极电极7和8的底表面延伸通过势垒层4到沟道层3内的杂质区域5.杂质区域5的底边缘不到达缓冲层2.

      版权所有(C)2012,JPO&INPIT