| 摘要 |
Embodiments of the present invention include a method of manufacturing a trench polysilicon diode. The method includes forming a N- (P-) type epitaxial region on a N+ (P+) type substrate and forming a trench in the N- (P-) type epitaxial region. The method further includes forming a insulating layer in the trench and filling the trench with polysilicon forming a top surface of the trench. The method further includes forming P+ (N+) type doped polysilicon region and N+ (P+) type doped polysilicon region in the trench and forming a diode in the trench wherein a portion of the diode is lower than the top surface of the trench.
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