Non-volatile memory device with a floating gate having a tapered protrusion
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United States of America Patent
Stats
-
Nov 18, 2003
Grant Date -
Feb 14, 2002
app pub date -
Jun 5, 2001
filing date -
Jul 19, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A non-volatile memory device includes a floating gate formed over a semiconductor substrate. At one end of the floating gate, there is a tapered protrusion having a horn-like or bird's beak shape. A control gate covers the floating gate except for the tapered protrusion. Sidewall spacers are formed adjacent to the floating gate and the control gate. An erasing gate is formed over the tapered protrusion of the floating gate.
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- Non-US Classification not provided for expired patents
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