Patent ID: 8049268

Claim:
A dielectric structure in a nonvolatile memory device including a floating gate, the dielectric structure and a control gate, the dielectric structure comprising: a first oxide layer; a first high-k dielectric film formed on the first oxide layer, wherein the first high-k dielectric film includes a compound of materials; a second oxide layer formed on the first high-k dielectric film; a second high-k dielectric film formed on the second oxide layer, wherein the second high-k dielectric film includes a compound identical to the compound of the first high-k dielectric film; and a third oxide layer formed on the second high-k dielectric film, wherein the compound of the first high-k dielectric film is chosen from a group consisting of HfO x Al y O z , ZrO x Al y O Z and LaO x Al y O z , and x, y and z are natural numbers.