Fabricating dual gate thin film transistors
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United States of America Patent
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Nov 30, 1993
Grant Date -
N/A
app pub date -
Mar 2, 1992
filing date -
Mar 2, 1992
priority date (Note) -
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Abstract
A method for fabricating a dual gate thin film transistor using a power MOSFET process having a first gate area (22) made from a monocrystalline silicon. A dielectric layer (25) is formed over the monocrystalline silicon. A first gate electrode (58) contacts the first gate area (22). A thin film transistor is fabricated on a first island of polysilicon (29) over the dielectric layer (25). The thin film transistor has a second gate electrode (55), and drain and source electrodes (56, 57) wherein the drain and source electrodes (56, 57) contact different portions of the first island of polysilicon (29). Preferably, the first gate electrode (58) is coupled to the second gate electrode (55).
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