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TW200816454A - Memory arrays and methods of fabricating memory arrays - Google Patents

Memory arrays and methods of fabricating memory arrays Download PDF

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Publication number
TW200816454A
TW200816454A TW096128462A TW96128462A TW200816454A TW 200816454 A TW200816454 A TW 200816454A TW 096128462 A TW096128462 A TW 096128462A TW 96128462 A TW96128462 A TW 96128462A TW 200816454 A TW200816454 A TW 200816454A
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memory array
received
gates
trenches
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TW096128462A
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TWI362743B (en
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Gordon A Haller
Sanh D Tang
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Micron Technology Inc
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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10BELECTRONIC MEMORY DEVICES
    • H10B12/00Dynamic random access memory [DRAM] devices
    • H10B12/30DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells
    • H10B12/34DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells the transistor being at least partially in a trench in the substrate
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C11/00Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/21Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
    • G11C11/34Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
    • G11C11/40Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
    • G11C11/401Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
    • G11C11/403Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells with charge regeneration common to a multiplicity of memory cells, i.e. external refresh
    • G11C11/405Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells with charge regeneration common to a multiplicity of memory cells, i.e. external refresh with three charge-transfer gates, e.g. MOS transistors, per cell
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10BELECTRONIC MEMORY DEVICES
    • H10B12/00Dynamic random access memory [DRAM] devices
    • H10B12/01Manufacture or treatment
    • H10B12/02Manufacture or treatment for one transistor one-capacitor [1T-1C] memory cells
    • H10B12/05Making the transistor
    • H10B12/053Making the transistor the transistor being at least partially in a trench in the substrate
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10BELECTRONIC MEMORY DEVICES
    • H10B12/00Dynamic random access memory [DRAM] devices
    • H10B12/30DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells
    • H10B12/48Data lines or contacts therefor
    • H10B12/488Word lines
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10DINORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D64/00Electrodes of devices having potential barriers
    • H10D64/01Manufacture or treatment
    • H10D64/025Manufacture or treatment forming recessed gates, e.g. by using local oxidation
    • H10D64/027Manufacture or treatment forming recessed gates, e.g. by using local oxidation by etching at gate locations
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10BELECTRONIC MEMORY DEVICES
    • H10B12/00Dynamic random access memory [DRAM] devices
    • H10B12/01Manufacture or treatment

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Manufacturing & Machinery (AREA)
  • Semiconductor Memories (AREA)
  • Non-Volatile Memory (AREA)

Description

200816454 九、發明說明: 【發明所屬之技術領域】 本發明係關於記憶料列及f造記Μ Ρ車列之方法。 【先前技術】 記憶體係-積體電路類型,用於在電腦系統内儲存資 料。其通常係在個別記憶體單元之一或多個陣列内製造。、 記憶體單元可為揮發性、半揮發性或非揮發性。非揮發性 «己隐體單元可在延長時間週期内儲存資料,許多實例中包 括電腦關閉時。揮發性記憶體耗散,因此需要予以刷新二 重新寫入,且許多實例中包括每秒多次。 Ο 不範性揮發性半導體記憶體係動態隨機存取記憶體 (DRAM),圖1内顯示一示範性先前技術dram單元。圖1 描述個別/單-DRAM單元1Q,其包含場效存取電晶體似 儲存電容器i 4。場效電晶體i 2包括一對源極/汲極區域 I5三I6以及一閘極17。源極/汲極區域16係描述為與儲存 電容器14連接,而源極/汲極區域15與位元線18電性連 接閘,17通常採用延長字元線形式,其形成數個形成為 列之场效電晶體之閘極。位元線18通常與形成為"行"(— 般與間極/字元線列垂直)之場效電晶體的複數個源極/沒極 區域15連接。許多實例巾,㈣場效電晶 Μ㈣性連接之共用源極/純區域15。 产已提出採用電容器之雙電晶體DRAM單元,如美國 第6,81 8,937號内所揭示。 雖然本發明目的在於解決上述問題,但並不限於此。本 123126.doc 200816454 1月/、又所附申4專利範圍的文字表述(不包括本說明書 的解釋或其他限制)及其相當原理所限制。 【發明内容】 本發明之揭示内容已提交,以促進美國專利法”促進科 • 學及有用技術進步”(第1章,第8段)的憲法目的。 I發明之方面包含記憶體陣列及製造記憶體陣列之方 可藉由任何方法製造記憶體陣列構造,而不必受限於 〇 纟文所揭示之製造記憶體陣列的方法。同樣,製造記憶體 J方法不必叉限於如本文所揭示之記憶體陣列構造。 【實施方式】 首先參考圖2說明記憶體陣列構造之示範性方面。各種 實施方案中,根據本發明製造之記憶體陣列包含形成於半 導體基板上之複數個記憶體單元。此文件之背景中,術語 半導體基板,,或,,半|體性基板,,定義成意味著任何包含半 導體性材料之結構,其包括但不限於塊狀半導體性材料, 〇 例如半導體性晶圓(單獨或在包含其他材料之組裝内),以 2,半導體材料層(單_或在包含其他材料之組裝内)。術 • 基板杉任何支撐結構,包括但不限於上述半導體性美 ^示IU生較佳半導體基板包括大容積半導體基板,例: 大容積單晶石夕。本發明之方面當然亦可用於絕緣物上半導 -、板及任何其他基板(無論是現有或待開發的),可在其 内或其上製造可操作記憶體陣列。 =憶體陣列將包含複數個記憶體單S,根據本發明之各 種實施方案的示範性個別記憶體單元—般參考圖2之數字 123126.doc 200816454 20來指示。並非記情 、“心… 所有記憶體單元具有相同構 结一 .^ 貝負上相同構造之個別記憶體 早凡0無确如何僅藉由範例, ^ ^ ^ ^ Λ ^ 圖2柄述包含半導體材料23 之半導體基板22 〇半導體姑斗立〇 把m 牛導體材枓23可包含大容積半導體材 枓’例如已採用導雷率辦% a , μ 3強雜質整體或對於較小隔離區域 及/或井加以適當背景摻雜的 作」八谷積早晶矽。當鈥可者詹 其他半導體材料及基板。僅ϋ …、了考慮 ^ 偟稭由乾例,+導體材料23之示 範性$景摻雜具有Ρ型適當劑詈 剜里//辰度,以便可在閘極活化 後形成η型場效電晶體之通道區域。 個別記憶體單元2〇包括第一場效電晶體24及第二場效電 晶體26。其各包含一閑極、-通道區域、及-對源繞 極區域。例如’將第一場效電晶體24描述為包含一閘極 28’將第二場效電晶體26描述為包含—閘極。在描述但 僅係示範性的-較佳具體實施射,纟形成於半導體基板 22之半導體材料23内的開σ 29及31内分別接收閘極28及 3〇。-項實施方案中,帛口 29及31採用延長溝渠形式,其 中接收之導電材料將形成用於多個記憶體單元之字元線/ 閘極。僅藉由範例’開口29及31之示範性開口寬度及所描 述相鄰開口間的間距較佳的係小於或等於5〇〇埃。用於所 描述溝渠開口 29及31之示範性深度自半導體材料23之最外 表面起係從100埃至500埃。用於閘極28及3〇之示範性較佳 導電材料係導電摻雜半導體材料及/或金屬。本文件之背 景中,"金屬"定義任何元素金屬、合金或元素金屬之混合 物、或導電金屬化合物。僅藉由範例,用於閘極28及3〇之 123126.doc 200816454 一較佳導電材料係氮化鈦。 將閘極介電質32描述為内層開口 29及3 1。任何適當的現 有或待開發介電質均可使用,二氧化石夕係一範例,其示範 性較佳厚度範圍係從30埃至80埃。 ' 々 每放電晶體24包含一對源極/汲極區域34及36,第 • 昜效電晶體26包含一對源極/汲極區域38及40。此可藉 由任何離子植入、擴散摻雜等以及任何其他程序(無論現 f) 有或待開發)形成。此類源極/汲極區域34、36、38及40之 不耗性較佳厚度從材料23之外表面起小於或等於5〇〇埃。 述之示範性較佳具體實施例中,該對源極/汲極區域之 一係在閘極28及30中間橫向接收,並由第一及第二電晶體 24及26共享。所描述之示範性具體實施例中,第一場效電 晶體24之源極/汲極區域36及第二場效電晶體%之源極/汲 才C戍4 0構成相同源極/汲極區域,其係由此類第一及第 一場效電晶體共享。一項實施方案中,如圖所示,在閘極 Ο 28之外橫向接收對34/36之其他源極/汲極區域34,在閘極
30之外橫向接收對38/4〇之其他源極/汲極區域%。所描述 之示範性較佳具體實施例中,在閘極28及3〇中間均橫向及 在其外部正面地接收共享源極/汲極區域36/4〇。另外在所 描述之較佳具體實施例中,在閘極28及30之外正面接收其 他源極/汲極區域3 4及3 8的各區域,而一較佳實施方案中 所描述之源極/汲極區域係形成於大容積半導體材料U 内。然而,當然可考慮其他構造,包括,僅藉由範例,提 兩之源極/汲極。 123126.doc -10- 200816454 第一場效電晶體24包含通道區域42,第二場效電晶體% 包含通道區域44。組合之下,但僅為一較佳具體實施例, 此會形成所描述斷面之一般w形狀。各通道區域U、料包 含至少一個基板斷面内之可切換電流路徑仆,其在共享源 • 極7汲極區域36M〇與個別其他源極/汲極區域34或延' 伸。較佳的係如圖所示,各電流路徑46包含互連之第一及 弟二Γf '垂直段48及50。所描述之示範性具體實施例 (") 中第及第一實質上垂直段48及50分別可視為包含正面 ㈣部分52’並且—互連段56係在第―實質上垂直段辦 接近正面内端部分52之第二實質上垂直段5〇間接收。所描 述之示範性具體實施例中,互連段56係相對於所描述之一 般基板方位實質上水平地加以定向。 圖2示意性地描述導電資料線6〇,其與源極/汲極區域對 34/36及源極/汲極區域對38/4〇之其他源極/汲極區域μ、 38的每—個電性連接。—項示範性較佳具體實施例中,在 G =極28及30之外正面接收導電資料線6〇。圖2亦示意性地 描述與共享源極/汲極區域36/4〇電性連接之電荷儲存裝置 62。所描述之示範性較佳具體實施例中,電荷儲存裝置α 包含一電容器。 “圖2不意性地描述與其個別源極/汲極區域電性連接之導 電資料線60及電荷儲存裝置62,此可能發生在任何方式下 或任何實施方案内。一較佳方面中,在閘極28及30之外正 面接收電荷儲存裝置62,且—較佳方面中,在閘極^及% 之外正面接收導電資料線6〇。另外在一較佳及示範性方面 123126.doc 200816454 ’在導電資料線60之外正面接收電荷儲存裝置62,例如 在-較佳實施方案中’如以下說明所例示。另外在一較佳 實施方案中’個別記憶體單元2G包含dram單元, 料線60包含一位元線。 Ο -較佳實施方案中’導電材料分別將第一及第二電晶體 24及26之閘極28及3()電性互連。例如,圖2概略性地描述 導電材料區域或段64 ’其將導電閘極取%電性連接。一 示範性實施方案中,與閘極28及3()互連之導電材料以係在 已形成於半導體基板22内(更佳的係半導體基板Μ之半導 體材料23内)之溝渠中接收。為清楚起見,圖2内描述之概 略性透視剖視圖中未顯示材料23及接近導電材料料之可能 的周邊絕緣材料3 2。 本發明之一方面包括記憶體陣列,其包含形成於半導體 基板上之複數個圮憶體單元。記憶體單元之個別單元包括 第一及第二場效電晶體,其分別包含一閘極、一通道區 ϋ 域、及一對源極/汲極區域。第一及第二場效電晶體之閘 極係硬佈線連接在一起。導電資料線係硬佈線連接至源極 //及極區域之二者,電荷儲存裝置係硬佈線連接至除該二 者外的源極/汲極區域之至少一個。例如,僅藉由範例, 圖2概略性地描述此一記憶體陣列之個別記憶體單元的示 摩巳性較佳構造,圖3示意性地描述此一示範性個別記憶體 單元。 此方面之一較佳實施方案中,在閘極之間橫向接收源極 /汲極區域之一。一較佳實施方案中,源極/汲極區域之一 123126.doc -12- 200816454 係由第-及第二場效電晶體共享,且在一較佳方面中 儲存裝置係連接至-共享源極/汲極區域。此方面之—較 佳實施方案中,藉由在形成於半導體基板之半導體材料内乂 並在閉極間延伸的至少一個溝渠内接收的導電材料將閉極 硬佈線連接在H而’可考慮電性互相極之盆他方 面’例如藉由分離互連線或層,或藉由現有或待開發之任 何其他方式,以及針對本揭示㈣之任何方面。—較佳實 Ο Ο 施方案中,各通道區域包含在源極/汲極區域間延伸的至 =一個斷面内之一電流路徑,其包含互連之第一及第二實 質上垂直段。亦可考慮首先描述之圖2具體實施例的任何 其他示範性屬性。 僅藉由範例,圖4至6描述關於圖2之示範性額外構造, 其併入導電資料線及電荷健存裝置結構。與圖2有相似的 代表符號’不同地係採用額外數字指示額外結構。絕緣蓋 7〇係在導電問㈣、30之上接收。示範性較佳材料係氮化 矽。已在半導體材料23之外正面形成層間介電質”。示範 !生材料係二氧化石夕,其可能加以摻雜或未換雜。已透過立 =成朝向源極m極區域34及38之導電資料線接觸開: ^已將導電材料75沉積及圖案化,以形成導電資料線 °此可藉由鑲鼓類程序形成’或藉由沉積及減法圖案化 =刻程序形成’僅藉由範例。一示範性較佳方法包括沉 =或多個導電材料75,其後跟隨後圖案化及減法蚀刻。 一圖案化材料75前或後將絕緣材料76沉積於其上,以及 /儿積及隨後各向異性蝕刻相同或不同絕緣材料%,以形成 123126.doc -13 - 200816454 絕緣導電資料線側壁間物 (禾颂不)。蝕刻以形成資料線 可有效地將材料75凹陷於接觸開口以内,如圖5之斷面 :所示,隨後在其内將某一絕緣間隔物形成材料%沉積於 圖5之斷面圖内的材料75之上。
ϋ 已沉積另-層間介電層78(圖5)。*範性較佳材料包括 雜或未摻雜—氧化石夕。已透過層間介電層Μ及Μ姓刻朝 向共享源極/汲極區域36/40之接觸開口 8〇。在其中接收導 電插入材料81。將電荷儲存褒置62描述為包含具有儲存節 點電極82之電容器,該電極與在接觸開σ8〇内接收之導電 ,塞81電性連接。在儲存節點電極82之外部及上方接收電 谷器 '電| 84,已在其上形成外導電單元板電極%。當 然對於電容器介電質84及導電電容器電極82及86可考慮任 何示範性或待開發之材料。 所榀述之圖2及圖4至6構造僅係根據本發明之各種方面 的個別5己憶體單元及記憶體陣列之示範性描述。熟習技術 人士會明白此可按多種方式中的任一種來製造,無論是現 有或待開發的。僅藉由範例,參考圖7說明製造記憶體陣 列之方法的示範性發明方面。圖7係包含(僅藉由範例)記憶 體陣列區域1〇〇之半導體基板的俯視圖。已將溝渠隔離區 域之作用面積區域及線1〇2的交替線1〇1形成於適當半導體 基板内,例如首先說明之具體實施例的基板22。已將一系 列跑道型溝渠104蝕刻成作用面積區域101及溝渠隔離區域 1 02 ’其一般與作用面積區域及溝渠隔離區域102的交替線 垂直。僅藉由範例,此可係用於製造個別記憶體單元的圖 123126.doc -14- 200816454 2之開口 29及31的形式。在該跑道型溝渠1〇4内形成導電材 料,以相對於跑道型溝渠之個別溝渠形成一對電性連接字 元線示範性較佳材料係參考閘極2 8及3 0所說明的上述材 料。相應地,並且亦在一示範性較佳具體實施例中,閘極 介電質(圖7中為清楚起見未顯示)係形成為在提供閘極材料 28/3 0前排列所描述之示範性跑道型溝渠1〇4。 可在跑道型溝渠1 04内部橫向地以及跑道型溝渠丄〇4外部 杈向地將源極/汲極區域形成於作用面積區域内。僅藉由 耗例,並參考圖2具體實施例,此類示範性橫向内部源極/ 汲極區域以36/40指定,此類示範性橫向外部源極/汲極區 域以圖7内之數字34及38指定。 將導電資料線(圖7内為清楚起見未顯示)形成為與在跑 道型溝渠外部橫向接收之源極/汲極區域電性連接,例如 其係朝向示範性圖2及4至6具體實施例之源極/汲極區域% 及38。將電荷儲存裝置(圖7内為清楚起見未顯示)形成為與 在跑道型溝渠1 〇4内部橫向接收之源極/汲極區域的個別區 域電I*生連接。例如且僅藉由範例,可相對於圖2及4至6具 體實施例之源極/汲極區域36/4〇形成電容器或其他裝置。 僅藉由範例,示範性分離導電接點110係顯示為在記憶體 陣列100外部接收,以便與導電材料(即相對於各溝渠1 之導電材料28及30)電性連接,以便存取/啟動各字元/間極 線對。 本毛明之一方面包含製造記憶體陣列之方法,其包含在 半導體基板内形成作用面積區域與溝渠隔離區域之交替 123126.doc -15- 200816454 線。圖7内僅藉由範例說明示範性此類交替線。將一系列 溝渠對姓刻成-般與作用面積區域與溝渠隔離區域之交替 線路垂直的作用面積區域及溝渠隔離區域。僅藉由範例, 圖7内所描述之示範性溝渠開口 2 9及3 1係示範性此類系列 溝渠對,而與是否形成跑道型溝渠無關。 無論如何在—實施方案中’在半導體基板内某處钱刻至 〆個互連溝渠,其將各對之溝渠的個別溝渠互連。例如 (-) 且僅藉由範例,所描述之示範性半圓/拱形溝渠區段112之 每-個係-示範性此類互連溝渠,其將個別溝渠對^及^ 互連。可僅製造或交替形成此類溝渠丨12之一,或可蝕刻 2態溝渠。另外’可同時及/或使用共同遮罩步驟钮刻示 範性溝渠對’或與遮罩步驟及/或蝕刻分離。 在溝渠對及互連溝渠内形成導電材料’以相對於溝渠對 之個別溝渠形成一對電性連接字元線。此可能包含同時或 完全不同時地在溝渠對及互連溝渠内沉積至少一些導電材 U 料。(圖2内互連材料/區域64對應於此類互連溝渠及導電材 料。) =對之溝渠的個別溝渠中間及各對之溝渠的個別溝渠 外部橫向地將源極/汲極區域形成於作用面積區域内。形 成與在各對之溝渠的個別溝渠外部接收之源極/沒極區域 電性連接的導電資料線。形成與在各對之溝渠的個別溝渠 中間接收之源極/汲極區域之個別區域電性連接的一電荷 儲存襄置。僅藉由範例,參考圖2及圖4至6之具體實施例 予以說明。 123126.doc -16- 200816454 圖2、圖4至6及圖7之上述示範性具體實施例可藉由許多 現有或待開發技術之任一技術來製造。另外,僅藉由範 二’圖2、4至6及7内描述之溝渠開口 29、31可製造成次微 衫。例如且僅藉由範例,溝渠開口輪廓可製造成第—硬遮 罩層内的最小可能之微影特徵大小。之後,可在其上沉積 額外適當薄之硬遮罩材料,以排列形成於第—硬遮罩層内 之溝渠的侧壁及基底。此可經受各向異性間隔物類姓刻,
從而在將溝渠開口 29及31敍刻成基板材料^前減小溝渠之 開放寬度,將描述之溝渠形成為次微影。另外,藉由採用 各向異性银刻之硬遮罩間隔物,其係沉積至小於當前最小 微影钕刻特徵尺寸之橫向厚度,溝渠間之硬遮罩區塊亦可 製造成類似方式之次微影。 另外無論如何,可在形成溝渠開口 29、31前沉積周邊電 路閘極材料,接著在圖案化周邊閘極材料以在周邊電路面 積内形成場效電晶體閘極前,透過陣列面積内之周邊電路 閘極材料形成溝渠開口 29、31。另外僅藉由範例,可沉積 所描述之示範性閘極介電質32及閘極材料28、3〇,並在從 陣列移除周邊閘極材料前相對於陣列内之周邊導電閘極材 料平坦化。另外僅藉由範例,記憶體陣列内之導電閘極材 料28、30的所描述示範性凹陷可與周邊閘極材料的蝕刻相 干地發生。另外僅藉由範例,形成於導電閘極材料以、3〇 上之絕緣材料70可與相對於周邊閘極構造形成的絕緣間隔 物之製造相干地形成並具有相同材料。當然也可就製造本 文所識別及主張之任何基板來考慮任何其他現有或待開發 123126.doc -17- 200816454 之處理 以及結合本文所主 方法。 張及說明的製4記憶體陣列之 I、、條例,本發明已就結構及方 予以說明。然而應明白,本㈣…特…細程度 定牿n w 本發^不限於顯示及說明的特 式:因此太揭示的構件包含實施本發明的較佳形 i内=之任何形式或修改皆屬於根據等效物教 令、田解釋的隨附巾請專利範圍之合適範缚内。 【圖式簡單說明】 以上已參考以下附圖說明本發明之較佳具體實施例。 圖1係先前技術DRAM單元之示意圖。 圖2係包含根據本發明之各種方面的記憶體單元之基板 片段的概略性透視剖視圖及部分示意圖。 圖3係根據本發明之一方面的單一 /個別記憶體單元的示 意圖。 圖4係包含圖2内所述記憶體單元之基板片段的擴大概略 性俯視平面圖。 圖5係沿圖4内線5 _ 5所取的概略性斷面圖。 圖6係沿圖4内線6-6所取的概略性斷面圖。 圖7係根據本發明之方面的基板片段之另一擴大概略性 俯視平面圖。 【主要元件符號說明】 10 DRAM單元 12 場效存取電晶體 14 儲存電容器 123126.doc -18 - 200816454 Ο 15 源極/汲極區域 16 源極/汲極區域 17 閘極 18 位元線 20 記憶體單元 22 半導體基板 23 半導體材料 24 第一場效電晶體 26 第二場效電晶體 28 閘極/導電閘極材料 29 開口 30 閘極/導電閘極材料 31 開口 32 閘極介電質/周邊絕緣材料 34 源極/>及極區域 36 源極/>及極區域 36/40 共享源極/汲極區域 38 源極/汲極區域 40 源極/汲極區域 42 通道區域 44 通道區域 46 可切換電流路徑 48 第一實質上垂直段 50 第二實質上垂直段 123126.doc -19- 200816454 52 正面内端部分 56 互連段 60 導電資料線 62 電荷儲存裝置 64 導電材料 70 絕緣蓋/絕緣材料 72 層間介電質/層間介電層 74 導電資料線接觸開口 75 導電材料 76 絕緣材料 78 層間介電層 80 接觸開口 81 導電插入材料/導電插塞 82 儲存節點電極/導電電容器電極 84 電容器介電質 86 外導電單元板電極/導電電容器電極 100 記憶體陣列區域 101 交替線 102 線/溝渠隔離區域 104 跑道型溝渠 110 導電接點 112 溝渠區段 123126.doc •20-

Claims (1)

  1. 200816454 十、申請專利範圍: 1 · 一種記憶體陣列,其包含: 複數個記憶體單元,其係形成於一半導體基板上,該 等記憶體單元之個別單元包含: • 第一及第二場效電晶體’其分別包含-閘極、一通 , 31區域、及—對源極/汲極區域;該等閘極係在形成於該 基板之半導體材料内的開口内接收,該對源極/汲極區域 f、 係在**亥專閘極中間橫向接收,並由該等第一及第二 電晶體共享’該等第一及第二電晶體之該對源極级極區 域的另一區域之每一個係在其個別閘極之外橫向接收,· 導電 > 料線,其係在該等閘極之外正面接收,並 與該對源極/汲極區域之另一區域的每一個電性連接; 以及 一電荷儲存裝置,其與共享源極/汲極區域電性連 接。 {) 2·如請求項1之記憶體陣列,其中該半導體材料包含大容 積半導體材料。 3.如請求項2之記憶體陣列,其中該大容積半導體材料包 含大容積單晶矽。 4·如請求項丨之記憶體陣列,其中在該等閘極之外正面接 收该對源極/汲極區域之一個區域。 5·如請求項1之記憶體陣列,其中在該等閘極之外正面接 收该對源極/汲極區域之該另一區域的每一個。 6.如請求項i之記憶體陣列,其中在該等閘極之外正面接 123126.doc 200816454 收孩對源極/汲極區域之該一個區域及該對源極/汲極區 域之該另一區域的每一個。 7·如請求項1之記憶體陣列,其中在該等閘極之外正面接 收該電荷儲存裝置。 8,如請求項1之記憶體陣列,其中在該等閘極之外正面以 及在4導電資料線之外正面接收該電荷儲存裝置。 9·如請求項1之記憶體陣列,其中各通道區域包含在該共 享源極/汲極區域與該個別另一源極/汲極區域間延伸的 至少一個斷面内之一電流路徑,其包含互連之第一及第 一貫質上垂直段。 1〇·如請求項1之記憶體陣列,其包含將該等第一及第二電 晶體之該等閘極電性互連的導電材料。 11·如請求項10之記憶體陣列,其中在形成於該半導體基板 内之一溝渠内接收該導電材料。 12.如請求項10之記憶體陣列,其中在形成於該半導體基板 之D亥半導體材料内的一溝渠内接收該導電材料。 13 ·如請求項1之記憶體陣列,其中 各通道區域包含在該共享源極/汲極區域與該個別另一 源極/汲極區域間延伸的至少一個斷面内之一電流路徑, 其包含互連之第一及第二實質上垂直段;以及 導電材料將該等第一及第二電晶體之該等閑極電性互 連。 14·如明求項i之記憶體陣列,其中該等記憶體單元包含 DRAM單元。 123126.doc 200816454 1 5 · —種記憶體陣列,其包含·· 複數個記憶體單元,其係形成於一半導體基板上,該 等記憶體單元之個別單元包含: 第一及第二場效電晶體,其分別包含一閘極、一通 道區域、及一對源極/汲極區域;該對源極/汲極區域之 一係在該等閘極中間橫向接收並由該等第一及第二電晶 體共旱’該等第一及第二電晶體之該對源極/汲極區域的 f/另〔域之母一個係在其個別閘極之外正面接收,各 通道區域包含在該共享源極/汲極區域與該個別另一源極/ 汲極區域間延伸的至少一個斷面内之一電流路徑,其包 含互連之第一及第二實質上垂直段; 一導電資料線,其與該對源極/汲極區域之該另一區 域的每一個電性連接;以及 一電荷儲存裝置,其與該共享源極/汲極區域電性連 接。 ο I6·如請求項15之記憶體陣列,其中該等第一及第二實質上 垂直^又包3正面内端部分,該一斷面内之該電流路徑包 含在接近該正面内端部分之該等第一與第二實質上垂直 段之間接收的一互連區段。 17· ^請求項15之記憶體陣列,其中該—斷面内之該電流路 4 13在6亥等第一與第二實質上垂直段之間接收的一互 連實質上水平段。 18· 士明求項15之記憶體陣列,其中在該等閘極之外正面接 收該導電資料線。 123126.doc 200816454 19·如請求項15之記憶體陣列,其中在該等閘極之外正面接 收該電荷儲存裝置。 20·如請求項15之記憶體陣列,其中在該等閘極之外正面以 及在該導|資料線之外正面接收該電荷儲存裝置。 2 1 ·如晴求項1 5之記憶體陣列,其包含將該等第一及第二電 晶體之該等閘極電性互連的導電材料。 22.如請求項15之記憶體陣列,其中該導電資料線包含一位 p 兀線’並且該等記憶體單元包含DRAM單元。 23· —種記憶體陣列,其包含: 複數個記憶體單元,其係形成於一半導體基板上,該 等記憶體單元之個別單元包含: 弟一及第一場效電晶體,其分別包含一閘極、一通 道區域、及一對源極/汲極區域;該對源極/汲極區域之 一係在該等閘極中間橫向接收,並由該等第一及第二電 晶體共享,該等第一及第二電晶體之該對源極/汲極區域 U 的另一區域之每一個係在其個別閘極之外橫向接收,導 電材料將該等第一及第二電晶體之該等閘極電性互連; 導電資料線’其與該對源極/汲極區域之該另一區 域的每一個電性連接;以及 一電荷儲存裝置,其與該共享源極/汲極區域電性連 接。 24.如印求項23之記憶體陣列,其中在形成於該半導體基板 内之一溝渠内接收該導電材料。 25·如印求項23之記憶體陣列,其中在形成於該半導體基板 123126.doc 200816454 之半導體材料内的一溝渠内接收該導電材料。 26. 如請求項23之記憶體陣列,其中在該等開極之外正面接 收該導電資料線。 27. 如請求項23之記憶體陣列,其中在該等閘極之外正面接 收該電荷儲存裝置。 28. 如請求項23之記憶體陣列,其中在該等閘極之外正面以 及在該導電資料線之外正面接收該電荷儲存裝置。
    U 29. 如請求項23之記憶體陣列,其中該電荷储存裝置包含一 電容器。 3 0 · —種記憶體陣列,其包含·· 複數個記憶體單元’其係形成於大容積半導體基板 上’該等記憶體單元之個別單元包含: 第一及第二場效電晶體,其分別包 道區域、及-對源臟極區域’·該等間極係=成= 基板之大容積半導體材料内的溝渠内接收,該對源極/沒 極區域之一係在該等閉極中間的大容積半導體材料内橫 向接收,並由該等第一及第二電晶體共享,該等第一及 第二電晶體之該對源極/汲極區域的另一區域之每一個係 在其個別閘極之外的大容積半導體材料内橫向接收,導 電材料將該等第-及第二電晶體之該等閘極電性互連, 各通道區域在該共享源極/没極區域與該個別另一源極/ 汲極間延伸的至少—個斷面内包含A容積半導體材料内 之—電流路徑,其包含互連之第一及第二實質 段; 、土且 123126.doc 200816454 ‘電 > 料線’其係在該等閘極之外正面接收,並 與該對源極/汲極區域之該另一區域的每一個電性連接; 以及 一電荷儲存裝置,其與該共享源極/汲極區域電性連 接’並且係在该導電資料線之外正面接收。 3 1 ·如請求項30之記憶體陣列,其中該導電材料包含金屬。 32·如請求項3 1之記憶體陣列,其中該金屬包含TiN。 3 3 · —種記憶體陣列,其包含: 複數個記憶體單元,其係形成於一半導體基板上,該 等記憶體單元之個別單元包含: 弟一及弟一場效電晶體,其分別包含一閘極、一通 道區域、及一對源極/汲極區域;該等第一及第二場效電 晶體之該等閘極係硬佈線連接在一起; 一導電資料線,其係硬佈線連接至該等源極/汲極區 域之兩個;以及 一電荷儲存裝置,其係硬佈線連接至除該等兩個以 外的该等源極/汲極區域之至少一個。 34·如請求項33之記憶體陣列,其中在該等閘極間橫向接收 該一個區域。 35·如請求項33之記憶體陣列,其中該等源極/汲極區域之一 係由該等第一及第二場效電晶體共享,該電荷儲存裝置 係連接至該一個共享源極/汲極區域。 36·如請求項33之記憶體陣列,其中藉由在形成於該半導體 基板之半導體材料内並在該等閘極間延伸的至少一個溝 123126.doc 200816454 渠内接收的導電材料將該等閘極硬佈線連接在一起。 37. 如請求項33之記憶體陣列’其中藉由在形成於料導體 基板之半導體材料内並在該等閘極間延伸的至少兩個溝 渠内接收的導電材料將該等閘極硬佈線連接在一起。 38. 如請求項33之記憶體陣列,其中在嗜犛 * ,、τ隹通寺閘極之外正面接 收該電荷儲存裝置。 39. 如請求項33之記憶體陣列,其中在該等間極之外正面接 ^ 收該導電資料線。 ’復如請求項33之記憶體陣列,其中各通道區域包含在源極/ 汲極區域間延伸的至少一個斷面内之一電流路徑,其包 含互連之第一及第二實質上垂直段。 41 · 一種製造一記憶體陣列之方法,其包含: 在一半導體基板内形成作用面積區域與溝渠隔離區域 之交替線; 將一系列跑道型溝渠蝕刻成一般與作用面積區域與溝 c, 渠隔離區域之該等交替線垂直的該等作用面積區域及溝 渠隔離區域; 在該跑道型溝渠内形成導電材料,以相對於該等跑道 型溝渠之個別溝渠形成一對電性連接字元線; 在該等跑道型溝渠内部橫向以及在該等跑道型溝渠外 部橫向形成該等作用面積區域内的源極/汲極區域; 形成與在該等跑道型溝渠外部橫向接收之該等源極/汲 極區域電性連接的導電資料線;以及 形成與在該等跑道型溝渠内部橫向接收之該等源極/汲 123126.doc 200816454 極區域之個別區域電性連接的一電荷儲存裝置。 42. —種製造一記憶體陣列之方法,其包含: 在-半導體基板内形成作用面積區域與溝渠隔離區域 之交替線; 冑一系列溝渠對蝕刻成-般與作用面積區域與溝渠隔 離區域之該等交替線垂直的該等作用面積區域及溝渠隔 離區域, 將至少一個互連溝準巍如+ c 蝕刻成互連各對之該等溝渠的個 別溝渠之該半導體基板; 在溝渠對及該互連溝渠内形成導電材料,以相對於該 等溝渠對之個別溝渠形成—對電性連接字元線; 在各對之該等溝渠的個別溝渠中間及各對之該等溝渠 的個別溝渠外部橫向形成該等作用面積區域内之源極/汲 極區域; 形成與在各對之該等溝渠的個別溝渠外部橫向接收之 I 該等源極/汲極區域電性連接的導電資料線;以及 形成與在各對之該等溝渠的個別溝渠中間接收之該等 源極/汲極區域之個別區域電性連接的—電荷儲存裝置。 43·如.月求項42之方法,其中钱刻該等系列溝渠對及钱刻該 互連溝渠包含一共同遮罩步驟。 牧如請求項42之方法,其中姓刻該等系列溝渠對及敍刻該 互連溝渠包含一共同蝕刻步驟。 45.=求項42之方法,其中形成該導電材料包含在該等溝 木對及邊互連溝渠内同時沉積至少—些導電材料。 123126.doc 200816454 46. 如請求項42之方法,其包含僅蝕刻用於各對之一個互連 溝渠。 47. 如請求項42之方法,其包含僅蝕刻用於各對之兩個互連 溝渠。 48. 如請求項42之方法,其包含蝕刻用於各對之多個互連溝 渠0 〇 ϋ 123126.doc
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