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    • 38. 发明授权
    • Method for fabricating a vertical transistor in a trench, and vertical transistor
    • 在沟槽中制造垂直晶体管的方法和垂直晶体管
    • US07208370B2
    • 2007-04-24
    • US10484562
    • 2002-07-08
    • Albert BirnerJoern Luetzen
    • Albert BirnerJoern Luetzen
    • H01L21/8242
    • H01L27/10864H01L27/10841H01L27/10867H01L27/10876H01L29/66666
    • To fabricate a vertical transistor, a trench is provided, the side wall of which is formed by a semiconductor substrate in single crystal form and the base of which is formed by a polycrystalline semiconductor substrate. A transition region is arranged between the side wall and the base. A semiconductor layer is deposited so that an epitaxial semiconductor layer grows on the side wall and a semiconductor layer grows on the base, with a space remaining between these layers. The semiconductor layers are covered with a thin dielectric, which partially limits a flow of current, and the space is filled. During a subsequent heat treatment, dopants diffuse out of the conductive material into the epitaxial semiconductor layer, where they form a doping region. The thin dielectric limits the diffusion of the dopants into the semiconductor substrate and prevents the propagation of crystal lattice defects into the epitaxial semiconductor layer.
    • 为了制造垂直晶体管,设置沟槽,其沟槽由单晶形式的半导体衬底形成,其基底由多晶半导体衬底形成。 过渡区域设置在侧壁和底座之间。 沉积半导体层,使得外延半导体层在侧壁上生长并且半导体层在基底上生长,并且在这些层之间保留空间。 半导体层被薄的电介质覆盖,其部分地限制了电流,并且填充了空间。 在随后的热处理期间,掺杂剂从导电材料扩散到外延半导体层中,在其中它们形成掺杂区域。 薄电介质限制掺杂剂到半导体衬底中的扩散,并防止晶格缺陷向外延半导体层的传播。
    • 40. 发明授权
    • Memory cell and method for fabricating it
    • 记忆单元及其制造方法
    • US07144770B2
    • 2006-12-05
    • US10980069
    • 2004-11-03
    • Albert BirnerMatthias FoersterThomas HechtMichael StadtmuellerAndreas Orth
    • Albert BirnerMatthias FoersterThomas HechtMichael StadtmuellerAndreas Orth
    • H01L21/8242
    • H01L29/66181H01L29/945
    • The invention provides a method for fabricating a memory cell, a substrate (101) being provided, a trench-type depression (102) being etched into the substrate (101), a barrier layer (103) being deposited non-conformally in the trench-type depression (102), grain elements (104) being grown on the inner areas of the trench-type depression (102), a dielectric layer (202) being deposited on the surfaces of the grain elements and the inner areas of the trench-type depression, and a conduction layer being deposited on the dielectric layer, the grain elements (104) growing selectively on the inner areas (105) of the trench-type depression (102) in an electrode region (301) forming a lower region of the trench-type depression (102) and an amorphous silicon layer continuing to grow in a collar region (302) forming an upper region of the trench-type depression (102).
    • 本发明提供了一种用于制造存储单元的方法,提供了一种衬底(101),蚀刻到衬底(101)中的沟槽型凹陷(102),在沟槽中非保形地沉积的阻挡层(103) 型凹陷(102),在沟槽型凹部(102)的内部区域上生长的晶粒元素(104),沉积在晶粒元素的表面上的介电层(202)和沟槽的内部区域 型凹陷,并且导电层沉积在电介质层上,晶粒元素(104)选择性地生长在形成下部区域的电极区域(301)中的沟槽型凹陷(102)的内部区域(105) 的沟槽型凹陷(102)和在形成沟槽型凹陷(102)的上部区域的凸缘区域(302)中继续生长的非晶硅层。