A split gate NAND flash memory structure is formed on a semiconductor
substrate of a first conductivity type. The NAND structure comprises a
first region of a second conductivity type and a second region of the
second conductivity type in the substrate, spaced apart from the first
region, thereby defining a channel region therebetween. A plurality of
floating gates are spaced apart from one another and each is insulated
from the channel region. A plurality of control gates are spaced apart
from one another, with each control gate insulated from the channel
region. Each of the control gate is between a pair of floating gates and
is capacitively coupled to the pair of floating gates. A plurality of
select gates are spaced apart from one another, with each select gate
insulated from the channel region. Each select gate is between a pair of
floating gates.