DEVICE MODEL AND PROCESS DESIGN KIT

PROBLEM TO BE SOLVED: To provide a device model, particularly including a split gate type non-volatile memory device, which can obtain a highly accurate simulation result.SOLUTION: According to one embodiment, a device model includes a first transistor model MSG that simulates characteristics of a s...

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Bibliographic Details
Main Authors KO RISHO, TSUNENO KATSUMI, MIYAMORI MITSURU
Format Patent
LanguageEnglish
Japanese
Published 05.07.2018
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Summary:PROBLEM TO BE SOLVED: To provide a device model, particularly including a split gate type non-volatile memory device, which can obtain a highly accurate simulation result.SOLUTION: According to one embodiment, a device model includes a first transistor model MSG that simulates characteristics of a selection gate transistor whose channel resistance varies according to a selection gate voltage Vsg applied to a selection gate, a second transistor model MMG that simulates characteristics of a memory gate transistor whose channel resistance varies according to a memory gate voltage Vmg applied to a memory gate, and a variable resistance model R0 that is set in correspondence to a gap region formed under an insulating film which insulates the selection gate and the memory gate and whose resistance value varies according to the selection gate voltage Vsg and the memory gate voltage V mg. The variable resistance model R0 is provided between the first transistor model MSG and the second transistor model MMG.SELECTED DRAWING: Figure 1 【課題】従来の素子モデルでは、特にスプリットゲート型の不揮発性メモリ素子について、精度の高いシミュレーション結果を得ることができない問題がある。【解決手段】一実施の形態によれば、素子モデルは、選択ゲートに印加される選択ゲート電圧Vsgによりチャネル抵抗が変化する選択ゲートトランジスタの特性を模擬する第1のトランジスタモデルMSGと、メモリゲートに印加されるメモリゲート電圧Vmgによりチャネル抵抗が変化するメモリゲートトランジスタの特性を模擬する第2のトランジスタモデルMMGと、選択ゲートとメモリゲートとを絶縁する絶縁膜の下部に形成されるギャップ領域に対応して設定され、選択ゲート電圧Vsgとメモリゲート電圧Vmgとに応じて抵抗値が変化する可変抵抗モデルR0と、を有し、第1のトランジスタモデルMSGと第2のトランジスタモデルMMGとの間に可変抵抗モデルR0が設けられる。【選択図】図1
Bibliography:Application Number: JP20160255157