TWO-BIT FLASH MEMORY
First Claim
1. A flash memory comprising:
- a substrate having a protrusion extending from a top face of the substrate;
a control gate, formed on the protrusion of the substrate and extendedly covering two opposite sidewalls of the protrusion;
two floating gates, formed on top of the protrusion and being on two opposite sides of the control gate respectively; and
a dielectric layer, sandwiched by the control gate and each of the two floating gates.
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Accused Products
Abstract
A flash memory includes a substrate with a protrusion, a control gate, two floating gates, and a dielectric layer. The protrusion extends from a top face of the substrate. The control gate is formed on the protrusion of the substrate and extendedly covers opposite sidewalls of the protrusion. The floating gates are respectively formed on top of the protrusion and being on two opposite sides of the control gate. The dielectric layer is sandwiched the control gate and each of the two floating gates. Because of the arcuate control gate used in the flash memory, the controllability of the control gate is increased and the memory cell window is enhanced.
223 Citations
14 Claims
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1. A flash memory comprising:
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a substrate having a protrusion extending from a top face of the substrate; a control gate, formed on the protrusion of the substrate and extendedly covering two opposite sidewalls of the protrusion; two floating gates, formed on top of the protrusion and being on two opposite sides of the control gate respectively; and a dielectric layer, sandwiched by the control gate and each of the two floating gates. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A flash memory comprising:
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a substrate, having a channel region; a source and a drain respectively formed on a first set of two opposite sides of the channel region in the substrate; a control gate, formed on top of the channel region to cover a portion of a second set of two opposite sides of the channel region; two floating gates, respectively formed on two opposite sidewalls of the control gate and on top of the channel region; an insulating layer, sandwiched by each of the two floating gates and the channel region; and a dielectric layer, sandwiched by the control gate and the floating gates. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification