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    • 6. 发明公开
    • Semiconductor device comprising a plurality of element separating trenches and method of manufacturing same
    • 具有多个沟槽的用于分离的部件和组件的方法的半导体器件。
    • EP0647968A2
    • 1995-04-12
    • EP94115893.3
    • 1994-10-07
    • KABUSHIKI KAISHA TOSHIBA
    • Ishimaru, Kazunari
    • H01L21/76H01L21/74H01L29/06
    • H01L29/0649H01L21/743H01L21/76237
    • A buried collector layer (2) is formed on a semiconductor substrate (1). An epitaxial layer (4) is formed on the buried collector layer (2). A plurality of element separating trenches (11) of roughly the same depth and filled with an insulating material are formed in the epitaxial layer (4). When these trenches are formed deep enough to penetrate the buried collector layer to the semiconductor substrate, an impurity region of conductivity the same as that of the buried collector layer is formed at a predetermined position of the semiconductor substrate and adjoining to at least one bottom portion of a plurality of the trenches. Further, when a separation layer is formed on the semiconductor substrate and adjoining to the buried collector layer to separate the semiconductor device from another adjacent semiconductor device, at least one of a plurality of trenches is formed on a boundary surface between the buried collector layer and the separation layer.
    • 掩埋集电极层(2)被形成在半导体衬底(1)上。 外延层(4)形成在集电极埋层(2)上。 元件分离沟槽大致相同的深度(11)和填充有绝缘材料,以形成多个在所述外延层(4)。 当合成沟槽形成足够深的穿透埋入集电极层的半导体衬底,以导电性的相同象埋入集电极层在所述半导体衬底的预定位置形成的杂质区和邻接于至少一个底部 的沟槽的多元性。 此外,当分离层是形成在半导体基片和邻接掩埋集电极层,以与另一相邻的半导体装置的半导体装置分开,沟槽中的多个的至少一个被形成在所述埋集电极层之间的边界表面 分离层。