Patent ID: 7928498

Claim:
A gate structure comprising: a tunnel insulation layer on a substrate; a floating gate on the tunnel insulation layer; a dielectric layer pattern on the floating gate; and a control gate on the dielectric layer pattern, which includes: a first conductive layer pattern on the dielectric layer pattern; a metal ohmic layer pattern on the first conductive layer pattern; a diffusion reduction layer pattern on the metal ohmic layer pattern; an amorphous layer pattern on the diffusion reduction layer pattern; and a second conductive layer pattern on the amorphous layer pattern, wherein the floating gate comprises: an additional first conductive layer pattern on the tunnel insulation layer; an additional metal ohmic layer pattern on the additional first conductive layer pattern; an additional diffusion reduction layer pattern on the additional metal ohmic layer pattern; an additional amorphous layer pattern on the additional diffusion reduction layer pattern; and an additional second conductive layer pattern on the additional amorphous layer pattern.