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    • 3. 发明授权
    • Charged balanced devices with shielded gate trench
    • 带屏蔽栅极沟槽的均衡器件
    • US09356134B2
    • 2016-05-31
    • US14312687
    • 2014-06-24
    • François Hébert
    • François Hébert
    • H01L21/336H01L29/78H01L29/10H01L29/06
    • H01L29/7813H01L29/0615H01L29/0623H01L29/0634H01L29/0696H01L29/0878H01L29/0886H01L29/1095H01L29/41766H01L29/4236H01L29/66734
    • This invention discloses a semiconductor power device disposed on a semiconductor substrate includes a plurality of deep trenches with an epitaxial layer filling said deep trenches and a simultaneously grown top epitaxial layer covering areas above a top surface of said deep trenches over the semiconductor substrate. A plurality of trench MOSFET cells disposed in said top epitaxial layer with the top epitaxial layer functioning as the body region and the semiconductor substrate acting as the drain region whereby a super junction effect is achieved through charge balance between the epitaxial layer in the deep trenches and regions in the semiconductor substrate laterally adjacent to the deep trenches. Each of the trench MOSFET cells further includes a trench gate and a gate-shielding dopant region disposed below and substantially aligned with each of the trench gates for each of the trench MOSFET cells for shielding the trench gate during a voltage breakdown.
    • 本发明公开了一种设置在半导体衬底上的半导体功率器件,包括具有填充所述深沟槽的外延层的多个深沟槽和覆盖半导体衬底上的所述深沟槽的顶表面之上的区域的同时生长的顶部外延层。 设置在所述顶部外延层中的多个沟槽MOSFET单元,顶部外延层用作主体区域,并且半导体衬底用作漏极区域,由此通过深沟槽中的外延层之间的电荷平衡和 半导体衬底中的与深沟槽横向相邻的区域。 每个沟槽MOSFET单元还包括沟槽栅极和栅极屏蔽掺杂剂区域,其设置在用于每个沟槽MOSFET单元的每个沟槽栅极的下方并基本对齐,用于在电压击穿期间屏蔽沟槽栅极。