Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – Having insulated gate
Reexamination Certificate
2005-07-19
2005-07-19
Zarabian, Amir (Department: 2822)
Semiconductor device manufacturing: process
Making field effect device having pair of active regions...
Having insulated gate
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
Francis Richard
Ng Chiu
International Rectifier Corporation
Ostrolenk Faber Gerb & Soffen, LLP
Perkins Pamela E
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