Semiconductor device and fabrication method thereof

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United States of America Patent

PATENT NO 6777254
SERIAL NO

09610217

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Abstract

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A p channel TFT of a driving circuit has a single drain structure and its n channel TFT, an LDD structure. A pixel TFT has LDD structure. A pixel electrode disposed in a pixel unit is connected to the pixel TFT through a hole bored in at least a protective insulation film formed of an inorganic insulating material and formed above a gate electrode of the pixel TFT, in an inter-layer insulation film disposed on the insolation film in close contact therewith. These process steps use 6 to 8 photo-masks.

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Patent Owner(s)

Patent OwnerAddress
SEMICONDUCTOR ENERGY LABORATORY CO LTDJAPAN'S KANAGAWA PREFECTURE ATSUGI CITY ATSUGI-SHI KANAGAWA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Arai, Yasuyuki Kanagawa, JP 452 18532
Koyama, Jun Kanagawa, JP 1634 57063
Yamazaki, Shunpei Tokyo, JP 7534 239327

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