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研究生: 歐陽勳
Ouyang, Hsun
論文名稱: 新型高度微縮性之嵌入式邏輯非揮發性記憶體之研究
The Novel Highly Scalable and Reliable One Time Program Memory Transistor beyond 90nm NVM Technology
指導教授: 林崇榮
Lin, Chrong-Jung
金雅琴
King, Ya-Chin
口試委員:
學位類別: 碩士
Master
系所名稱: 電機資訊學院 - 電子工程研究所
Institute of Electronics Engineering
論文出版年: 2009
畢業學年度: 97
語文別: 中文
論文頁數: 109
中文關鍵詞: 非揮發性記憶體
相關次數: 點閱:1下載:0
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  • 隨著積體電路製程不斷微縮,在90 nm製程之後能使用於嵌入式非揮發性記憶體衍生出電容耦合,氧化層漏電,軟性崩潰等等問題,無法有效隨著製程縮小其尺寸,目前尚無真正有效的解決方法。在國際論文中,大多嘗試以新的架構取代原有的堆疊式記憶體,然而其解決方式的技術難度過高。在本篇論文中,將提出一完全符合邏輯製程步驟的新式非揮發式記憶體,此架構已經130 nm、90 nm製程世代驗證,本論文將其概念實現於45 nm與32 nm等前瞻性邏輯製程步驟,提供嵌入式非揮發性記憶體元件另一種選擇考量。
    本研究中所提出的元件,無須特殊製程與光罩步驟,採用電晶體本身既有的間隙壁結構,以兩電晶體串聯方式產生自我對準氮化矽儲存層,提供電荷儲存。元件在寫入機制上採用源極注入,可有效率的將熱電子注入儲存層中,並利用二維製程與電性模擬軟體驗證分析元件基本特性,在先進製程中,更可實現以帶對帶穿隧寫入機制達到抹除的效果,進一步達到多次寫入抹除的可能性。此記憶體結構相對於傳統記憶體,在製作成本與元件縮小性上有相當大的改進及優勢。


    章節目錄 摘要 Ⅱ Abstract Ⅲ 致謝 Ⅳ 章節目錄 Ⅴ 附圖目錄 Ⅷ 附表目錄 ⅩⅠI 第一章 緒論 1 1.1 記憶體介紹與應用 1 1.2 研究動機 2 1.2 論文大綱 2 第二章 各類嵌入式記憶體設計與機制回顧 4 2.1 電子式熔絲元件(Electrical Fuse) 4 2.2 單一複晶矽可電性寫入記憶體結構(Single Poly EPROM) 5 2.3 氧化層崩潰反向熔絲結構(Anti Fuse XPM) 5 2.4 間隙壁式氮化矽結構(SONOS Spacer) 6 2.5 各類元件特性比較總結 6 第三章 隨製程演進的SAN記憶體之結構與機制討論 15 3.1 90 nm SAN元件架構與元件隨製程演進討論 15 3.1.1 元件結構 16 3.1.2 製程介紹 16 3.1.3 先進製程演進差異性比較 17 3.2 90 nm元件載子注入機制回顧 18 3.2.1源極注入機制回顧 18 3.2.2帶對帶穿隧熱載子寫入機制回顧 19 3.2.2 N通道SAN元件以源極注入模擬 20 3.2.3 P通道SAN元件以源極注入模擬 20 3.3 元件隨製程演進下各類載子注入機制模擬 21 3.3.1 45 nm與32 nm使用源極注入機制 21 3.3.2 帶對帶穿隧熱載子寫入機制回顧 21 3.3.3 45 nm與32 nm使用帶對帶穿隧寫入機制 21 3.4 SAN元件讀取特性 22 3.5 SAN元件陣列 23 第四章 SAN記憶體元件演進之特性分析 53 4.1 90 nm製程元件特性量測結果 53 4.1.1 閘極間距調變讀取電性量測 53 4.1.2 寫入最佳化特性 54 4.1.3 讀取最佳化特性 55 4.1.4 寫入電流與功耗控制 55 4.1.5 資料儲存性 56 4.1.6 讀取干擾與寫入干擾 56 4.2 前瞻性製程元件特性量測結果 57 4.2.1 閘極間距調變讀取電性量測 58 4.2.2 以源極寫入最佳化特性 58 4.2.3 以帶對帶穿隧寫入最佳化特性 59 4.2.4 資料儲存性 59 4.2.5 讀取干擾與寫入干擾 60 4.3 二位元讀取討論 60 4.3.1 掃描不同閘極偏壓所產生的通道電流變化 60 4.3.2 第二位元讀取 61 第五章 製程演進結果討論 98 5.1 閘極間距調變差異性討論 98 5.2 寫入差異性討論 98 5.3 可靠度分析差異性討論 99 5.3.1 資料儲存性討論 99 5.3.2 讀取/寫入失真討論 99 5.4 結論 100 第六章 總結 104 6.1 各類嵌入式記憶體元件優點分析 104 6.2 結論與展望 104 參考文獻 106

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