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    • 6. 发明授权
    • BeTe-ZnSe graded band gap ohmic contact to p-type ZnSe semiconductors
    • BeTe-ZnSe分级带隙欧姆接触到p型ZnSe半导体
    • US5422902A
    • 1995-06-06
    • US87307
    • 1993-07-02
    • Piotr M. Mensz
    • Piotr M. Mensz
    • H01L33/00H01L29/225H01L29/45H01S5/00H01S5/042H01S5/327H01S5/347H01S3/19
    • B82Y20/00H01L29/225H01L29/45H01S5/0421H01S5/327H01S5/347
    • The present invention relates to semiconductor devices with ohmic contact to ZnSe-based layers and lasers derived therefrom wherein BeTe is used in a graded band gap layer. Preferably, an ohmic contact layer of BeTe-containing graded composition is used which consists essentially of Be.sub.x Zn.sub.1-x Te.sub.x Se.sub.1-x wherein x is within the range of 0 and 1 selected so as to provide substantial lattice matching to the lattice structure c the substrate. Specifically, Be.sub.x Zn.sub.1-x Te.sub.x Se.sub.1-x graded gap semiconductor layers are provided for application as ohmic contacts to p-type ZnSe, ZnS.sub.x Se.sub.1-x, Zn.sub.1-x Cd.sub.x S, Zn.sub.1-x Cd.sub.x S.sub.y Se.sub.1-y, Zn.sub.1-x Mg.sub.x S.sub.y Se.sub.1-y (wherein x and y are a number selected from 0 to 1) and other II-VI compound semiconductors used in lasers grown on GaAs substrates. Due to the close lattice match to GaAs substrate, graded (BeTe).sub.x (ZnSe).sub.1-x contact allow for the entire device structure to be grown within the pseudomorphic limit.
    • 本发明涉及与ZnSe基层和从其衍生的激光器欧姆接触的半导体器件,其中BeTe用于渐变带隙层。 优选地,使用包含BeTe的渐变组合物的欧姆接触层,其基本上由BexZn1-xTexSe1-x组成,其中x在0和1的范围内被选择,以便为衬底的晶格结构c提供实质的晶格匹配。 具体地说,提供BexZn1-xTexSe1-x渐变间隙半导体层作为与p型ZnSe,ZnSxSe1-x,Zn1-xCdxS,Zn1-xCdxSySe1-y,Zn1-xMgxSySe1-y(其中x和y为 选自0至1的数字)和用于在GaAs衬底上生长的激光器中的其它II-VI化合物半导体。 由于与GaAs衬底紧密的晶格匹配,渐变(BeTe)x(ZnSe)1-x接触允许整个器件结构在伪晶界内生长。