Angled implant for shorter trench emitter

Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – Having insulated gate

Reexamination Certificate

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C438S524000, C438S589000

Reexamination Certificate

active

06919248

ABSTRACT:
An insulated gate trench type semiconductor device having L-shaped diffused regions, each diffused region having a vertically oriented portion and a horizontally oriented portion extending laterally from the vertically oriented portion, and a method for manufacturing the device in which the vertically oriented portion of each L-shaped diffused region is formed by directing dopants at an angle toward a sidewall of a trench to form the vertically oriented portion using the edge of the opposing sidewall of the trench as a mask.

REFERENCES:
patent: 6118150 (2000-09-01), Takahashi
patent: 6274437 (2001-08-01), Evans
patent: 6583010 (2003-06-01), Mo

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