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TW295631B - - Google Patents

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Publication number
TW295631B
TW295631B TW085104099A TW85104099A TW295631B TW 295631 B TW295631 B TW 295631B TW 085104099 A TW085104099 A TW 085104099A TW 85104099 A TW85104099 A TW 85104099A TW 295631 B TW295631 B TW 295631B
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TW
Taiwan
Prior art keywords
yoke
electrical circuit
spatial light
light modulator
item
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TW085104099A
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English (en)
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Texas Instruments Inc
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00Optical devices or arrangements for the control of light using movable or deformable optical elements
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0816Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
    • G02B26/0833Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
    • G02B26/0841Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD the reflecting element being moved or deformed by electrostatic means

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Description

A7 B7 五、發明説明(/ ) <相關申請案交互參考> 交互參考到下列一般分派共審查中的專利申請案,其敎 導在此中被合倂參考: - 經濟部中央標準局員工消費合作社印製 序號 標題 申請曰期 08/171,303 Improved Multi-Level Digital Micromirror Device 12-21-93 08/239,497 PFPE Coatings for Micro· Mechanical Devices 05-09-94 08/373,692 Monolithic Programmable Format Pixel Array 01-17-95 08/382.566 Spatial Light Modulator with Buried Passive Charge Storage Cell Array 02-02-95 08/300,356 Pixe里 Control Circuitry for Spatial Light Modulator 09-02-94 TI18138 (法案備審) Spatial Light Modulator with Superstructure Light Shield 03-31-95 08/389,673 Single Bit Line Split Reset Memory Cell for Digital Micro-Mirror Device Display Array 02-16-95 08/396,024 Method for Creating a Digital Micromirror Device Using an Aluminum Hard Mask 02-27-95 --------〈 裝------訂------i k (請先閱讀背面之注意事項再填寫本頁)... 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 經濟部中央標準局員工消費合作社印製 295631 A7 B7 ~ 五、發明説明(>) <發明技術領域> 本發明一般而言係關於空間光調變器用於調變入射光以 形成一個光學的光影像,且更特別是關於一種數位微鏡 元件(DMD ),其有一個雙穩態的微鏡陣列裝配在定址 電器回路上· ’ <發明背景> 、Λ 空間光調變器(SLMs )在光學資訊處理,投影顯示,影 像與製圖顯示器,電視,與照像印刷等領域有極多的運 用· SLMs是以一個空間型式調變入射光以相對應於一 個電氣或者光學输入來形成一個光的影像的元件·入射 光可在它的相位,強度,極化,或方向被調變·光的調 變可被各種展示多樣的電光或磁光效果的材料與經由表 面變形來調變光的材料所達到· 一個SLM通常地包含可定址的圖素(pixels)的一個區 域或線性陣列♦來源圖素資料首先由一個通常外在於 SLM的結合的控制電路所格式化,然後一次一個畫面地 載入圓素陣列*圖素資料可被寫到圖素陣列,其使用各 種演算法,亦即,連續頂端到底部一次一個圖素行,經 由連續地交錯定址頂端到底部一次一個圖素行,諸如: 本纸張尺度適用中國國家標準(CNS ) Α4規格(210X297公釐) I I I(-衣— — I I ^ I n I n —Λ ^ (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明(3) 先奇數圖素列,然後,返回到偶數圖素列等等·於陰極 射線管(CRTs >資料寫入技術名爲掃猫(rasterizing), 藉以一個高電源電子槍從左到右掃瞄越過熒光幕的圖素 基本元件,一次一行·此圖素位址資料寫入方案也同樣 適用於液晶顯示器(LCDs ) · 達拉斯德州儀器公司的一個最近的革新元件是數位微’鏡 元件或可變形鏡面元件.DMD是一個電子/機構/光學 SLM適用於顯示器,放映機與硬性複本印表機· DMD是 —個單一晶片的積體電路SLM,ϋ 一摘高密度陣列的 16微米方正的可動微鏡在17微米中心·這些鏡面被裝配 在包含一個SRAM細胞陣列與位址電極的位址電器回路 上.每個鏡面形成一個DMD陣列的圖素且是雙穩態的, 亦即說,穩定於二個位置,其中直接於鏡面陣列的光來 源將被反射於二個方向上的一個·於一個穩定的“ON” 鏡面位置,到那鏡面的入射光將被反射到一個放映機鏡 頭與聚焦在一個顯示銀幕或一個印表機的感光性基本元 件·於其它“〇 F F”鏡面位置,在鏡面的光將偏斜到一 個光吸收器.陣列的每個鏡面是個別地被控制以指引入 射光進入放映機鏡頭或到光吸收器·放映機鏡頭從圖素 鏡面最後集中焦點和擴大調變光於一個顯示銀幕並於一 個顯示器的情況產生一個影像.假如每個DMD陣列的圖 素鏡面是於“0N”位置,顯示的影像將是一個明亮圖素 陣列· 本紙張尺度適用中國國家標準(CNS ) A4规格(210X 297公釐) nn ^^^1 ^^^1 I n nn I (請先閲讀背面之注意事項再填寫本頁). 訂 A7 A7 經濟部中央標準局員工消費合作社印製 B7 五、發明説明(幺) 爲對DMD元,件有一個更詳細的討論與使用,請交互參考 美國專利 5,061,049 于 Hornbeck,標題 “Spatial Light Modu丨ator and Method”;美國專利 5,079,544 于 DeMond 等等,標題 “Standard Independent Digitized Video System” ;與美國專利 5,105,369 于 Nelson,標題 “Printing System Exposure Module Alignment Method and Apparatus of Maiuifacture'”,其每個專利都被分派到本發明的相同的 受讓人且其敎導在此中被合倂參考·形成影像的圖素灰 階是以這些鏡面的脈動寬度調變&術~來達到,諸如於專 利 S,278,652 標題爲 “DMD Architecture and Timing for Use in a Pulse-Width Modulated Display System”中所敘述,其 分派到本發明的相同受讓人,且敎導在此中被合併參 考. DMD是革命性因爲它眞得是一個數位顯示元件與一個積 體電路的解決方案· DMD的演進與變異得感謝一些一般 分派專利的讀取.DMD空間光調變器的“第一代”提供一 個可偏斜的梁(beam ),其中鏡面和梁是相同的.亦即, 一個靜電力被產生在鏡面和在下列的位址電極之間以引 起其間的歪斜,這些鏡面的歪斜可能是可變的且操作在 類比模式,且可能包含一個葉片弾簧或懸臂梁,如揭露 於一般分派美國專利4,662,746于Hornbeck,標題爲 “Spatial Light Modulator and Method”,美國專利 4,710,732 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) ---------一丨裝------訂-----ί 级 (請先閲讀背面之注意事項再填寫本頁).. 經濟部中央標準局員工消費合作社印製 A7 B7 i、發明説明(f) 于 Hornbeck,標題爲 “Spatial Light Modulator and Method”,美國專利 4,9S6,619于 Hornbeck,標題爲 “Spatia丨 Light Modulator”,與美國專利 5,172,262 于 Hornbeck,標題爲 “Spatial Light Modulator and Method”, 其每個敎導在此合倂參考· 第一代DMD也可具體化爲一個數位或雙穩態元件梁 (鏡面)能包‘含一個微鏡,其由一個扭力鉸鏈所支撐並 軸轉動二方向之一 10度,直到鏡面尖端著陸於一個著陸 墊子♦如此實施例被揭露於一般#派~美國專利5,〇61,049 于 Hornbeck 標題爲 “Spatial Light Modulator and Method” ·爲限制於鏡面尖端與著陸墊子之間的范德瓦爾 斯力(Van der Eaa丨s Forces ),著陸墊子可由一個形成 於著陸墊子的導向單層來鈍化·此單層減少了范德瓦爾 斯力並防止鏡面到電極的黏著·此技術被揭露於一般分 派美國專利5,331,454于Hornbeck,標題爲“Low Rese《 Voltage Process for DMD”,其敎導包含在此中以便參考. DMD的“第二代”被具體化於一般分派美國專利 5,083,857 標題爲 “Multi-Level Deformable Mirror Device”,與愼共審專利申請序號08/171,303標題爲 “Improved Multi-Level Digital Micromirror Device”,在 1993年12月21日申請.於此第二代元件,鏡面被提高在 一個軛之上,此軛是經由一對扭力鉸鏈懸在定址電器回 本紙張尺度適用中國國家標準(CNS ) Α4規格(210X 297公釐) (請先閱讀背面之注意事項再填寫本頁) .裝·
、1T A7 295631 B7 五、發明説明(厶) (請先閲讀背面之注意事項再填寫本頁).. 路上·如描述於圖3c的此運用,一個靜電力被產生於一 個提髙鏡面與提高電極之間·當轉動時,此轭與一個著 陸電極接觸,藉以鏡面尖端從不與任何結構接觸·軛的 較短矩手臂,大約鏡面的50%,允許能量更有效率地被 結合進入鏡面,其經由重置脈動,由於鏡面尖端是自由 移動的事實·應用共振重置脈動到鏡面以幫助旋軸結構 自著陸電極離開是被揭露於一般分派美國專利 ’ 5,096,279 標題爲 “Spatial Light and Method”,與美國尊利 5,233,456 標題爲 “Resonant Mirror and Method of -;Λ
Manufacture” ·然而,產生在鏡面和’提高的位址電極之間 的部份位址扭矩相對應於第一代元件是被犧牲了,因爲 軛稍變小了位址電極的面積· 需要提供一種改善的DMD,其有一個更有效率的重置作 用,與發展一個元件有更多位址扭矩,鎖存器扭矩,與 位址握持扭矩·此改善的元件將最好是使用基線裝配流 程來裝配· <發明槪要> 經濟部中央樣準局員工消費合作社印製 本發明達到的技術優勢如一個DMD空間光調變器,其經 由側延伸轭於一個平行這些鉸鏈的方向,因此軛重疊第 一對位址電極的一個實質部份·第二對提高位址電極被 提供在轭的側邊且在由軛所支撐的一個提高鏡面下·位 -8 - 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 經濟部中央標準局員工消費合作社印製 A7 B7_ 五、發明説明(7") 址扭矩於第一對位址電極與軛之間與於提高的第二對位 址電極與提高鏡面之間被達到•轭比鏡面關於提高的位 址電極是被空出而較近在下列的位址電極·既然於對立 部件之間每單位面積的力與一除距離正方成比例ρ在軛 和在下列的第一對位址電極之間的每單位面積力是達到 於鏡面與提高的第二對位址電極之間的每單位面積力的 4倍·本發明比較早一代產品有優越的位址扭矩,氣存 器扭矩,位址握持扭矩與重置力,且處理流程不變· 本發明包含一個包含一個基片的i間1調變器·包含一 個第一個部份的定址電器回路被提供而鄰接基片,並也 包含提高在基片之上的第二個部份·有一個轭被支撐在 定址電器回路的第一個部份上·至少一個鉸鏈被連接到 軛並支撐轭,其鉸鏈允許軛歪斜在定址電器回路第一個 部份上·一個圖素被提高在轭上且由轭所支撐,此圖素 是位在提高的定址電器回路第二個部份上·定址電器回 路的第一和第二部份彼此電氣連接,藉以提供給第一和 第二部份的一個電位產生一個靜電力於二個地方·首 先,一個靜電力被產生於轭與定址電器回路第一個部份 之間,其次是於提高的圖素與提高的第二個部份之間· 在轭和第一個部份之間的距離大約是定義於圖素和提高 的第二個部份之間的距離的一半·軛與位址電器回路第 一個部份的對立面積實行一個定址扭矩,其比產生於提 -9 - 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) (請先閱讀背面之注意事項再填寫本頁). -裝‘ 訂 經濟部中央標準局員工消費合作社印製 A 7 B7五、發明説明(?) 高的圖素和提高的第二個電極之間的定址扭矩大於大約 4倍·淨値的位址扭矩是添加的,且大體而言是大於早 一代DMD元件所產生的位址扭矩· 軛最好有一個像蝴蝶的外形*有一對軛尖端在一個軛軸 的每個邊·當轉動時,一對軛尖端著陸於一個著陸墊子, 藉以支撐與提高的圖素鏡面依然是自由的任何結構/如 此,重置脈動能被提供給鏡面,最好.在一個鏡面的共^ 頻率以達到一個好的重置作用·轭最好大體而言是與這 些鉸鏈相同平面且可使用單一蝕漁流’程來裝配,以便這 些鉸鏈是形成來用於精確的對齊與平衡· 空間光調變器更進一步地包含連接到定址電器回路的控 制電器回路·此控制電器回路提供位址資料到定址電器 回路的第一和第二個部份兩者以引起圖素的歪斜·最 好,定址電器回路第一個部份,其包含一個墊子,被提 供在旋轉圖素軸的每個邊,而一個分開的定址電器回路 的第二個部份是提供在此軛軸的圖素每個邊之下·控制 電器回路提供位址資料到一個這些定址部份組的任一個 以引起軛與鏡面的歪斜向定址部份來引起軛與鏡面的歪 斜向定址的第一和第二個部份·最好,圖素是一個鏡面, 有一個長方形的外形對於鉸鏈有幾何學45度的導向端以 最小化沿著這些暗場光學所感受的圖素端產生的繞射項 目. -10- (請先閲讀背面之注意事項再填寫本頁).. -裝- -一° _(泳 本紙張尺度適用中國國家標準(CNS ) A4規格(2丨0X297公釐) A7 B7 經濟部中央標準局員工消費合作社印製 五、發明説明(叉) 有一個軛懸在一對位址電極上並支撐一個在一個第二對 位址電極上的提髙的鏡面的DMD元件對於位址電極與可 樞軸結構(換句話說,即軛與鏡面)之間的吸引區域達 到一個顯著的增加·在下列的位址電極在基片上,包含 金屬3,被小心地設計以最大化吸引區域,而允許軛尖 端著陸在有與鏡面與軛相同電位的著陸電極•用於裏面 的提高的位址電極已經被從第二代元件更改了以容納¥ 發明的延伸的軛,而維護能被產生於鏡面與提高電極之 間的大部份扭矩·任何由於提高^極’1的減少區域而失去 的扭矩是超過用於經由軛延伸叠覆位址電極的補償,這 些位址電極比鏡面到提高的電極是被位在從軛的一半距 離·與第二代元件相比,其能被產生的淨値位址扭矩幾 乎是二的因素大•本發明也達到一個較大的鎖存器扭矩 和位址握持扭矩· <圖示簡述> 圖1是一個根據本發明的一個空間光調變器的較佳實施 例的方塊圖,包含列位址與欄資料載入電器回路用於控 制一個包含微鏡的圖素陣列; 圖2是一個顯示於圖1的DMD圖素陣列的一個爆炸遠視 圖,包含一個提高的微鏡被裝配於一個可偏斜的軛上, -11- 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) ---------1 .裝------訂 (請先閲讀背面之注意事項再填寫本頁).. 經濟部中央標準局員工消費合作社印製 2956^1 A7 B7
五、發明説明(/W 此轭接著是經由一對鉸鏈支撐,灰斜的區域舉例說明在 提高鏡面和提高位址電極之間,與在軛和包含金屬3於 基片的在下列的位址電極之間的靜電吸引地區; 圖3是一個於鏡面與提高的位址電極之間與於耜與在下 列的位址電極之間的靜電吸引力的說明,軛和鏡面是電 氣連接到一個偏離/重置匯流排並有相同的電壓偏離; 圖4是從顯示於圖1的陣列的一個3 X3圓素陣列的一個 剖面圖,其這些軛的一些部份,ώ高:的位址電極,與鉸 鏈支撐突片被移去以舉例說明定義基片水平位址電極與 基片水平偏離/重置型式的金屬層3,也舉例說明被移去 的部份提高鏡面以描述重疊在下列的基片水平位址電極 的一部份的提高的軛; 圖5是一個顯示於圖4的圖素鏡面的二個穩定偏斜狀態 的說明,其用於偏斜入射光到二個方向中的一個; 圖6是圖1沿著鉸鏈軸取之的一個DMD陣列的圖素的橫 斷面視圖以舉例說明提高的鏡面位址電極和被支撐在一 對基片位址電極上的轭; 圓7也是一個橫斷面視圖諸如圖6,以轭和支撐在上面的 鏡面一起轉動到一個穩定的狀態,藉以軛尖端著陸於一 -12- 本紙張尺度適用中國國家標準(CNS ) Α4規格(210Χ297公釐) ---------1 ,裝------訂------{沐 (請先閲讀背面之注意事項再填寫本頁).. 經濟部中央標準局員工消費合作社印製 A7 B7____ 五、發明説明(//) 對分別的著陸墊子,而提高的鏡面依然鄰接但從提高的 鏡面位址電極空出; 圖8-13連續地舉例說明半導體材料的多樣層,其使用傳 統健全的半導體處理技術來處理以裝配圖2的圖素; 圖14是本發明的另一個選擇的較佳實施例的一個爆#遠 視圓,藉以軛只有一個唯一的著陸尖端定義扭力軸的每 個邊; 圖15還是本發明的另一個選擇的較佳實施例的一個爆炸 遠視圖,藉以軛在扭力軸的每個邊有單一著陸尖端,且 其中軛被平行到扭力軸而延伸超過在下列的基片位址電 極. <較佳實施例詳述> 現在參考圖1,一個包含一個數位微鏡元件(DMD )的 空間光調變器被一般地顯示在10. DMD10是一個單晶 片積體電路包含一個864 X 576微鏡陣列12 .陣列12是 單片地裝配在一個864 X 36記憶體細胞陣列16上.於此 36個形成記憶體細胞陣列16的記憶體細胞列的每個記憶 體細胞結合並控制一個十六個圖素18的專注群*顯示於 圖2·每個記憶體細胞包含一個主要的1位元靜態隨機存 -13- 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公嫠) I-------^ -裝------訂-----4泳 (請先閱讀背面之注意事項再填寫本頁): 經濟部中央榡準局員工消費合作社印製 A7 B7 i、發明説明(/ >) 取記憶體(SRAM)細胞,與一個經由主要細胞饋入的 第二個1位元SRAM細胞.有864個位元線BL0-BL863連 接到記憶體細胞的每一個864欄中一個·櫊圖素資料經由 結合的位元線BL0-BL863被載入編址主要記憶體細胞列 MRn ·主要記憶體細胞藉分別地致能結合列的寫或讀致 能線(WDn或者RDn )來編址,藉以WPe被連接到列MRn 的每個主要細胞的致能輸入·此圖素資料是經由致-通 用的控制線MXFRB從主要的細胞鎖存進入分別的第二 個細胞,MXFRB線被連接到陣列16的全部第二個細胞 的致能输入.第二個記憶體細胞未質"上操作爲一個陰影 鎖存器,藉以資料能從主要的記憶體細胞被載入第二個 記憶體細胞,允許主要的記憶體細胞然後後來可被重載 入新的圖素資料而不影響第二個記憶體細胞的內容·對 於陰影鎖存器的另外討論技術,請交互參考一般分派共 審查專利申請案,序號08/389,673標題爲“Spatial Light Modulator Having Single Bit-Line Dual-Latch Memory Cells”,於1995年2月16日申請,其敎導在此中被合併 參考·對於控制電器回路的更詳細討論,包含載入電器 回路和DMD10的測試控制,請交互參考一般分派共審査 中專利申請案,序號:08/373,692標題爲“Monolithic Programmable Format Pixel Array** » 於 1995 年 1 月 17 日 申請,其敎導在此中被合倂參考. 現在參考圖2,顯示鏡面陣列12的一個圖素18 ♦第二個 -14- 本紙張尺度適用中國國家標準(CNS ) A4規格(2丨0X297公釐} ---------1 "裝--—---訂------{ ^ (請先閲讀背面之注意事項再填寫本頁)‘ 經濟部中央標準局員工消費合作社印製 A7 B7 __ 五、發明説明(/3) 記憶體細胞的資料被提供給一對補充的位址電極線,每 個線輪流被連接到裝配在陣列12的每個圖素18之下並與 之結合的二個位址電極26和28中一個.圖素18包含一 個方正鏡面30經由一個支撐突片34被支撐並提高在一個 軛之上,一般而言顯示爲32 .支撐突片34從鏡面中心延 伸往下,並如顯示沿著一個扭力軸附上封軛32的中心, 以平衡鏡面30的質量中心於軛32上.軛32 —般而言’有 —個蝴蝶外形’,稍後將更詳細地談論,並沿著一個中心 軸經由一對扭力鉸鏈4〇被軸支撐·每個扭力鉸鏈40的其 它端附上到一個鉸鏈支撐突片蓋争並由其所支撐,其 被定義在一個分別的鉸鏈支撐突片44的頂端•一對提高 的鏡面位址電極50和52被分別的位址支撐突片54與56 所支撐· 位址支撐突片54與S6與鉸鏈支撐突片44支撐位址電極 50與52,扭力鉸鏈40與軛32以離開一個偏離/重置匯流 排60與基片水平位址電極墊子26和28對並在其上·當 鏡面30與軛32對於扭力軛的軸被一起轉動,其由這些鉸 鏈40,一對軛尖端58在軛32側面所定義,軛32在著陸 位置62偏斜著陸並接合偏離/重置匯流排60 · 現在參考圖2會同圖3,根據本發明的較佳實施例的圖素 I8的一個技術優勢將會被相當詳細地談論·鏡面30與軛 32的旋轉能夠在二個方向中一個被達到,以達到—個雙 -15· 本紙張尺度適用中國國家標準(CNS ) A4規格(21〇X297公釐) (請先閱讀背面之注意事項再填寫本頁)._ 裝· 訂 經濟部中央標準局員工消費合作社印製 A7 B7_ 五、發明説明(/冬) 穩態的狀態並調變入射光如顯示於圖5且即將被談論· 一個位址電壓經由結合的電極支撐突片S4與56被提供給 二個位址電極墊子26或28中一個與一個相對應的提高鏡 面位址電極50或S2 .此位址電屋可以是5伏特―其和 CMOS邏輯電器回路是相容的,但也能包含其它層次假如 需要的話·同時,+15伏特偏離電壓被提供給偏離/重置 匯流排60,並如此經由支撐突片44,突片蓋子42,’與 鉸鏈40到軛32,和經由支撐34到鏡面30 ·本發明達到 技術優勢是經由提供一個靜電力於在由陰影區域所舉例 說明於圖2的二個位置的對立表命之~間:這些靜電吸引 力也被舉例說明在圖3的70,76,80與82 . 經由例子,當+S伏特被提供在補充的位址線V»時,假如 鏡面30與軛32將被轉動計數器位址線Va ·此後,一個 + 1S伏特電位被提供在偏離線Vb到偏離/重置匯流排60 以提供一個+15伏特電位在轭32與鏡面30上.一個從2〇 伏特差額的靜電吸引力被產生於位址電極26與軛32在此 基片位址電極之上的部份之間,此力一般而言被顯示在 70·懸垂編址電極26的軛32的相對應部份被陰影部份所 顯示在74 ·相反地,假如鏡面是被轉動在一個順時針方 向,一個0伏特電位將被提供給補充位址電極28以產生 一個吸引力在76,以懸垂位址電極28的轭32的相對應 部份被以陰影地區在78來顯示· -16- 本紙張尺度適用中國國家標準(CNS ) A4規格(210X 297公釐) I — — — — — I I I 訂 ^1 . I 九·^ (請先閲讀背面之注意事項再填寫本頁). 經濟部中央標準局員工消費合作社印製 A7 _B7_ 五、發明説明(/夕) 當一個靜電吸引力是被產生在7〇於軛的一半與在下列的 位址電極26,之間時,一個靜電吸引力也正產生於提高的 位址電極50與鏡面30之間如顯示於圖3中80·此靜電吸 引力被產生於鏡面30的顯示在82在提高位址電極· S0之 上的部份之間的電壓電位所產生·鏡面30懸垂位址電極 S2的部份被顯示在84 ·所以,經由定址一個位址電極26 或28,其接著提供一個位址電壓到相對應的提高位0:電 極50或52,靜電吸引力被產生在二個地方,顯示在70 與80或在76或82. —旦+1S伏特電位被應用到偏離匯 流排60,並後來到軛32與鏡面3〇 ',~選捧性地應用此0 伏特位址電位到二個位址電極26或28中一個決定了鏡面 30與轭32因此將轉動的途徑· 參照圖3,能看出提高的位址電極50和52 —般而言是與 軛32共平面的,其每個是空出在位址電極26與28之上 距離約1微米·鏡面30在提高的位址電極50和S2之上的 分離大約是此距離兩倍,或大約2微米·既然於對立表 面之間的吸引力的變化直接是一個一除以對立表面之間 距離的平方的函數,產生於轭32與位址電極26與28之 間每單位面積的靜電吸引力是產生於鏡面30與相對應的 提高位址電極S0與52之間的吸引力的四倍大.這些產生 在扭力軸的每個邊的力是添加的,與一起引起鏡面30與 軛32在向著位址電極的方向轉動· -17· 本紙張尺度適用中國國家標準(CNS ) A4規格(2丨0X297公釐) --------〃裝------訂------ (請先閲讀背面之注意事項再填寫本頁).. 經濟部中央標準局員工消費合作社印製 A7 B7_ 五、發明説明(/彡) 於一個另一個選擇實施例,提高電極50與52與它們相對 應的支撐突片能被消除*於此實施例,在軛32之上的鏡 面30的高度只有約1微米以達到一個強的吸引力以電極 26與28的在下列的末梢部圓形突出·當偏斜時,鏡面30 將轉動向,但將仍然不與之接合,位址電極26與28的相 對應的末梢部圓形突出·於此實施例,包含這些突片44, 軛32與鏡面30的提高結構是所有都相等電位且一個Μ路 的風險被避免了 •如此,對於一組提.高電極的限制將不 被推論· '' · ··· 位址扭矩(Τβ)是由位址電壓獨自與軛32與鏡面30產 生的扭矩·此位址扭矩是顯著地大於由先前一代DMD元 件所產生用於類似位址電壓和偏離電位的位址扭矩·本 發明如此有一個改善的位址邊際,其被定義爲當偏離電 壓被應用時,位址電壓V·和需要來保証鏡面轉動在適合 方向的電位之間的差別· 本發明的圖素也有一個增加的鎖存扭矩(ΙΊ),其被定 義爲有一個位址電壓傾向轉動鏡面到相對狀態時由偏離 電壓所產生的鎖存扭矩的一個測量·本發明另外的大量 改善的性能參數是一個增加的地址握持扭矩(Th),其 被定義爲於偏離電壓關閉期間在重置後位址電壓握持鏡 面於它的著陸狀態的能力的一個測量·本發明的另外改 善是一個增加的重置力(Fr),其被定義爲由單一脈動 -18- 本紙張尺度適用中國國家標準(CNS ) A4規格(210X 297公釐〉 ---------( 裝---I--訂------^ ^ (請先閲讀背面之注意事項再填寫本頁).. 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明(//) 重置與經由鉸鏈頂端產生的恢復力的結合所產生的尖端 反應力的一個測量· 全部這些四個性能參數大體而言經由本發明被改善而超 過先前一代DMD元件,因爲軛32的設計產生一個靜電吸 引力於在下列的位址電極,並結合被產生於提高的鏡面 和提高的位址電極之間的靜電吸引力·由於可旋轉的’軛 的接近在位址電極之上,與其間一個.本質對立的面積: 所有上面論及的性能參數能被顯著地增加,且對於機電 DMD元件的效率增加有貢獻·特鈿¥,對於鉸鏈仍然不 變,比先前一代元件有一個1·8倍的較高位址扭矩·鎖存 扭矩被改善而超過先前一代元件2.6倍·產生的重置力是 前一代DMD元件的8.8倍·以所有改善的性能參數,用 於裝配本發明流程,其即將被敘述,幾乎是與先前一代 元件相同,如此對於先前一代元件而言提供一個“似無卻 有”的優點· 本發明的DMD元件意含包含如上述較大的位址邊際,對 於位址倒轉有校低的感受性,較低的重置電壓需求,與 較高交換的速度,交換速度於如一個空間光調變器的元 件的操作是重要的·以現今的設計,非線性的鉸鏈甚至 可以被合併,假如需要的話可以更硬的鉸鏈,因爲有改 善的位址邊際與鎖存邊際· •19- 本紙張尺度適用中國國家標準(CNS ) Α4規格(210Χ297公釐) (請先閲讀背面之注意事項再填寫本頁): 裝· 、1Τ 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明(/<?) 爲減少由於范德瓦耳斯力而黏附的可能性,著陸電極 60,特別是在地區62相對應於從轭32的尖端58的接觸 點,可被鈍化·經由鈍化著陸電極,軛32附著或黏附的 趨勢能被減少·黏附是一個禁止力其需要大的重置電壓 被應用以重置鏡面到一個平的狀態,或轉換鏡面到對立 可偏斜的雙穩態的狀態·鈍化著陸電極的方法被揭露於 —般分派美國專利案號5,331,454于Hornbeck,標題’爲 “Low Reset Vo 丨 tage Process for DMD” r 與於一般分派共審 査中專利申請案序號:08/239,497,標題爲“PFPE Coating - .· for Micro-Mechanical Devices”,'1.994.年 5..月 9_ 日申請, 其每個敎導在此合倂參考·爲達到重置鏡面,且引起鏡 面的歪斜到其它雙穩態的狀態,偏離/重置線可以一個相 對應於鏡面的共振頻率的頻率而被電壓脈動,其通常是 大約5 ΜΗΖ,諸如揭露於一般分派美國專利5,096,279 標題爲 “Spatial Light Modulator and Method**,其敎導在 此中被合併參考· 現在參考圖4,陣列12的一個3 X3陣列部份的部分遠 視圖被顯示以舉例說明於矽基片上金靥層3的裝配,此 金屬層3定義於矽基片上的位址電極與偏離/重置匯流 排·也被舉例說明的是提高的鏡面位址電極,突片蓋子, 與這些在金屬層3之上支撐軛32的鉸鏈.鏡面支撐突片 是由分別的軛沿著圖素的扭力軸所支撐· -20- 本紙張尺度適用中國國家標準(CNS ) A4規格(210 X 297公釐) ---------< ' 裝------訂------^ ^ (請先閱讀背面之注意事項再填寫本頁),. 經濟部中央標準局員工消費合作社印製 Α7 Β7 五、發明説明(/f) 現在參考圖5,顯示一個光學簡要圖藉以入射光線被調 變並偏斜到二個方向中一個,視鏡面是於“Ο N”或“0 F F ”狀態而定·當鏡面30是於〇 N狀態,入射光被反射到 一個包含放映機鏡頭的光學,並於一個前面或後方的銀 幕放映機的情況下最後集中焦點於一個顯示銀幕,或於 一個電子照像印表機的情況下集中焦點於一個感光性表 面·當鏡面30是於OF F位置,入射光被反射到一_光 吸收器並從暗場光學離開·於鏡面30的雙穩態的狀_ i 間的20度旋轉達到反射入射光的一個40度擺幅·如此, 本發明達到一個高對比比率的空ή光‘影像,其對於暗場 光學系統的使用是重要的,本發明的空間光調變器即被 意圖用於暗場光學系統· 現在參考圖6與7,顯示採.自圖2線Α-Α圖素18的剖面 圖但支撐突片未顯示.如顯示於圖6,以軛32與鏡面30 於未偏斜(平坦)的狀態,轭32 —般而言是與提高的位 址電極50與S2共平面,約在金屬層3之上距離1微米且 包含位址電極26和28與重置/偏離匯流排60.鏡面30被 提高在此對提高的位址電極50和52上大約2微米,其大 約是分開軛64與基片的距離的兩倍· 參照圖7,當軛32與鏡面30被編址且在一個順時針方向 方向轉動如顯示,編址軛32 —半的著陸尖端58對著陸在 重置/偏離匯流排60的部份62 .然而,提高鏡面30,當 -21- 本紙張尺度適用中國國家標準(CNS ) Α4規格(210X297公釐) (請先閲讀背面之注意事項再填寫本頁),. •裝· 訂 295631 A7 _ B7 五、發明説明(>幻 隨其轉動時,保持從相對應的提高的位址電極S2分開並 空出在其上:如顯示,轭32的力矩臂關於扭力軸大約是 鏡面30力矩臂的一半·與鏡面3〇相比著陸轭32的較短 空間減少需要來重置一個黏住鏡面的扭矩,但使用太短 的著陸軛會造成另外的應力在扭力鉸鏈·這些力的較好 理解被敘述於一般分派共審查中專利申請案序號·. 08/171,303 標題爲 “Multi-Level Digital Micromirror”, H93年12月21日申請,其敎導在此中被合倂參考.旣長 軛32著陸於一對對立的尖端58並被對稱設計,一個大區 域的位址電極26和28能被定義在~轭i2之下如顯示於圖 2 ·此外,減少黏附力於軛與著陸電極部份62之間已經 被觀察到了,如此當改變或重置鏡面狀態時,需要應用 一個較低的重置電壓· 現在參考圖8-13,將敘述一個詳細討論關於半導體裝配 流程來實行裝配一個圖素18 ·於每一個圖中,爲說明與 明確的目的,剖面圖是取自圖2線B-B,雖然那不是以一 定的比例· 經濟部中央標隼局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 首先,參照圖8,一個砂基片64被處理以便形成在下列 的位址電器回路,其包含記憶體細胞I6的陣列,列位址 電器回路20,與欄資料載入電器回路30 ·此後,基片64 被覆蓋著一個保護的氧化物層1〇2·接著,一個第三個金 屬化的層,一般歸爲M3 ’噴射置放於部份處理的晶圓並 -22- 本紙張尺度適用中國國家標準(CNS ) A4規格(210X 297公釐) 經濟部中央標準局員工消費合作社印製 A7 ___ ___B7_ 五、發明説明(>/) 顯示在104 ·此第三個金屬化層被蝕刻並定義位址電極 26與28和偏離/重置匯流排60如顯示於圖2與圖4·接 著,一個鉸鏈間隔元件層106被灑散積存在位址電器回路 上且最好包含有1微米厚度的正光阻.一對經由(vias)llO 被打開經過光阻層106以幫助形成鉸鏈支撐突片,然後光 阻層106在一個高溫被深XIV硬化以防止於隨後的處理步 驟期間的流動與水泡· ’ 現在參考圖9,一個金屬化的薄鉸鏈層112被噴射置放在 光阻層106上並進入經由U0如示鉸鏈層112最好有 一個厚度大約是500埃,與能包含鋁,鋁屬,鎢,與其它 適合本發明的傳導性材料·鉸鏈支撐突片44被定義於此 步驟如顯示,並電氣連接到偏離/重置匯流排60 ·同樣於 此步驟期間,定義了電極支撐突片54和56對,雖然其未 被顯示,藉以層112是噴射存放在一對相對應成型於光阻 106的經由,這些經由是已形成於當經由110被打開時的 先前步驟期間·如此,電極支撐突片和鉸鏈支撐突片是 很類似的·光阻間隔層106的厚度決定鉸鏈的空氣間隙, 並如此決定由於軛32的角自由度的鏡面旋轉角度直到它 接合著陸電極· 現在參考圖10,一個第一個氧化物罩幕是電漿積存並在 鉸鏈40的外形被型式•然後,一個鋁屬厚金屬層,大約 3,000埃厚,被置放· 一個第二個氧化物罩幕是電漿積存 -23- 本紙張尺度適用中國國家標準(CNS ) Α4規格(210Χ297公釐) --------ί 袭------、订------{ ^ (請先閱讀背面之注意事項再填寫本頁),._ Α7 Β7 五、發明説明(>>) 然後在軛32,提高電極54與56與鉸鏈支撐蓋子42的外 形被型式·薄鉸鏈層112與較厚金屬層然後被蝕刻以定義 .位址電極50與52,鉸鏈支撐蓋子42與這些鉸鏈40如顯 示·單一電漿蝕刻被使用來定義這些結構·此二個氧化 物層功能如蝕刻停止器並保護在它們下的金屬層·在電 漿蝕刻流程完成之後,氧化物蝕刻停止器被從薄金屬鉸 鏈,較厚金屬支撐突片蓋子42,這些電極50與Μ舆這 些鉸鏈40移去,如顯示於圖10 . . ’ 現在參考圖U,一面厚鏡面間隔%'伴層122被灑散積存 在這些鉸鏈,電極和鉸鏈支撐蓋子上,且最好包含大約 有2微米厚度的正光阻·一個經由124在此光阻間隔元件 層122被打開以提供一個開口在軛32之上如顯示,然後 光阻層122被深UV硬化· 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁): 參照圖12,一個鏡面金屬層,包含一個鋁屬並有反射性 質,然後被噴射積存到一個厚度大約4,000埃·此層形成 鏡面支撐突片34與鏡面30兩者·一個罩幕氧化物層然後 被電漿積存於鏡面層上,且在長方形的鏡面外形被型 式.鏡面金屬層然後被電漿蝕刻以形成鏡面30與支撐突 片34如顯示.罩幕氧化物層通常留在適合的地方而晶圓 後來被處理和鋸以獲得鑄模·參照圖13 ’這些晶片被放 置於一個電漿蝕刻室’那裡罩幕氧化物層與間隔元件層 106和122兩者被電漿蝕刻掉’留下鉸鏈空氣間隙在鉸鏈 • 24· 本紙張尺度適用中國國家標準(CNS ) Α4規格(21〇X297公楚〉 A7 B7 五、發明説明 40與軛32之下和一個鏡面空氣間隙134在提高鏡面30 下. 現在參考圖14,一個本發明的另一個選擇實施例的遠景 爆炸視圖被一般顯示在200·圖素200很類似如談論於圖 1-13中的圖素18,其中類似數字參照類似的基本元件· 然而,圖素200有一個軛202,其稍被修改而有單一著陸 尖端204在扭力軸的每個邊如顯示·當轉動時,軛202# 的一個尖端204將被轉動直到它接合並著陸於一個相對 應的著陸電極208 ·軛202大體而言重·疊從在基片上金屬 層3形成的每對位址墊子210和212·產生靜電吸引力的 對立表面的相對應地區被顯示而在214,216,218與 220陰影區域如顯示•鉸鏈222從鉸鰱突片224支撐轭 202 ·提高的位址電極228和230是與軛202共平面. 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 現在參考圖15,仍是本發明的另外一個選擇的較佳實施 例被顯示在300 ·圖素300很類似於顯示於圖200的實施 例與顯示於圖1-13的圖素18,其中類似數字參照類似基 本元件·圖素300,如顯示,也有單一著陸尖端提供在扭 力軸的每個邊,類似於圖14的實施例· 一個軛302大體 而言平扭力軸被延伸並超過在下列的位址電極,那裡一 對位址電極304與306被提供在軛302的一面,而另外一 對位址電極310和312被提供在偏離/重置匯流排320的另 外一邊,其有一個X型式如顯示·此二個位址電極304 -25- 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 295631 A7 B7 — " 五、發明説明(2#) 和3〇6是電氣彼此連接,且其它對位址電極310和312是 電氣連接在一起·這些位址電極對經由一個相對應的支 撐突片336被電氣連接到提高的鏡面位址電極330與332 如顯示·靜電吸引區域被顯示在陰影區域350,352, 354,356,358與360·鉸鏈362從突片364支撐軛302 · 於此實施例,偏離/重置匯流排320有一個X外形,且分 叉位址電極對如顯示·以一個X外形,偏離/重置匯流排 能被容易地與方便地互連到於矽基片上金屬層3的鄰接* 圖素·此可產生一個想要的佈面(layout)用於以一個共用 的偏離/重置匯流排來控制圖素的多:數個列,且也幫助分 開重置技術諸如揭露於一般分派美國專利申請案序號: 08/300,356 標題爲 “Pixel Control Circuitry for Spatial Light Modulator”,申請日期2/16/9S,其敎導在此中被合併參 考·軛尖端的著陸邊沿著偏離/重置匯流排被提供如顯示 在 340 ♦ 經濟部中央標準局員工消費合作社印裝 (請先閲讀背面之注意事項再填寫本頁) 扼要如下,揭露一種DMD類型的空間光調節器,其有靜 電力產生在二個位置以引起圖素鏡面的歪斜·首先,一 個吸引力被產生於軛與一個在下列的基片位址電極之 間·其次,一個靜電力也被產生於提高的鏡面與一個提 高的位址電極之間·這些靜電力是添加的,且實行了改 善的性能參數而優於先前一代DMD元件·既然軛被分開 在基片位址電極之上一個距離相等於在鏡面和提高的位 址電極之間空出的一半,可達到每單位面積吸引力是在 •26- 本紙張尺度適用中國國家標準(CNS ) A4規格(210 X 297公釐) A7 五、發明説明(25) 鏡面和提高的電極之間所產生的力的4倍大.本發明的 設計達到較高的位址扭矩,較高鎖存扭矩,較高重置力, 與較大的位址邊際·圖素對於位址倒轉較不敏感,需要 的重置電壓較低,且可消除共振重置與多數重置脈動的 必要·達到較高的交換速度,藉以非線性與較硬的鉸鏈 能被提供,其是由於上述之改善的性能參數.圖素陣列 能從基線流程的小修改來裝配·如此,本發明的空間·光 調變器達到的改善的性能參數之優於先前產品是一個/ “似無卻有”的設計· - •, ·* .. 雖然本發明已藉一個特定的較佳實施例被敘述了,很多 變異和修正對於那些熟練於此技術的人士在硏讀本申請 案後將變成是明顯的·所以以習知技‘術觀之,附加的申 請專利範圍的用意應盡可能廣泛解釋以包含全部如此的 變異與修正· (請先閲讀背面之注意事項再填寫本頁) 裝. 、11 經濟部中央標準局員工消費合作社印裝 -27- 本紙張尺度適用中國國家標準(CNS)A4規格(2丨0x297公釐)

Claims (1)

  1. 經濟部中央標準局員工消費合作社印裝 Α8 Β8 C8 D8 夂、申請專利範圍 1 . 一種空間光調變器,包含: a ) —個基片; b) 定址電器回路包含一個提供在鄰接該基片的第一個部 份和一個提高在該基片之上的第二個部份; - c) 一個軛被支撐在該定址電器回路的第一個部份上; d) 至少一個鉸鏈連接到該軛並支撐該軛,該鉸鏈允許該 軛的歪斜;與 ’ e) —個提高在上並由該軛所支撐的圓素,該圖素位在ά 提高的定址電器回路的第二個部份上· 2 ·如申請專利範圍第1項之空間光調變器包含一對該 鉸鏈沿著一個軛軸而在軸方向支撐該軛· 3 ·如申請專利範圍第1項之空間光調變器,其中該軛 的寬度少於該圖素的寬度且該圖素重疊該軛· 4 ·如申請專利範圍第2項之空間光調變器,其中該軛 有一對轭尖端在該軛軸的每個邊· 5 ·如申請專利範圍第4項之空間光調變器,其中該軛 有一個蝴蝶外形* 6 ·如申請專利範圍第1項之空間光調變器,其中一個 第一個空出是定義於該軛與該定址電器回路第一個部份 -28- 本紙張尺度適用中國國家標準(CNS ) Α4規格(210Χ297公釐) (請先閲讀背面之注意事項再填寫本頁) 裝. 訂 經濟部中央標準局員工消費合作社印製 A8 B8 C8 D8 々、申請專利範圍 之間,與一個第二個空出是定義於該圖素與該定址電器 回路第二個部份之間,其中該第一個空出是小於該第二 個空出♦ 7 ·如申請專利範圍第1項之空間光調變器,其中該軛 是大體而言與該定址電器回路第二個部份在相同的平 面. ' 8 ·如申請專利範圍第2項之空間光調變器*其中一個 第一對對立面積被定義於該轭與該定址電器回路第一個 部份之間,與一個第二對對立面積被定義於該圖素與該 定址電器回路第二個部份之間,該第二對對立面積對於 該軛軸比該第一對對立面積定義了較‘大的側距離· 9 ·如申請專利範圍第1項之空間光調變器,更進一步 地包含一個偏離/重置匯流排建造在該基片上並電氣連接 到該圖素· 10 ·如申請專利範圍第1項之空間光調變器,其中該鉸 鏈大體而言與該軛在相同的平面· 11 ·如申請專利範圍第1項之空間光調變器,更進一步 地包含控制電器回路被耦合於該定址電器回路,該控制 電器回路提供位址資料到該定址電器回路第一個部份與 -29- 本紙張尺度適用中國國家標準(CNS ) A4%^· ( 210X297公釐) (請先閲讀背面之注意事項再填寫本頁) -裝· 、1T A8 B8 C8 D8 六、申請專利範圍 該第二個部份以引起該圖素的歪斜· 12 .如申請專利範圍第2項之空間光調變器,更進一步 地包含控制電器回路被耦合於該定址電器回路,該控制 電器回路提供位址資料到該定址電器回路的第一個部份 之一以引起該軛的歪斜向該編址的第一個部份· * 13 .如申請專利範圍第1項之空間光調變器,更進一步~ 地包含一個支撐突片連接到該鉸鏈並支撐該鉸鏈· 14 .如申請專利範圍第1項之空間光調變器,其中該定 址電器回路第一個部份和該第二個部份是電氣互相連接 的. 15 .如申請專利範圍第1項之空間光調變器,其中該圖 素是一個鏡面· 16 .如申請專利範圍第15項之空間光調變器,其中該鏡 面有一個長方形外形· 經濟部中央標準局員工消費合作社印装 I 1 n n 訂 (請先閱讀背面之注意事項再填寫本頁): 17 .如申請専利範圍第16項之空間光調變器’其中該鏡 面的邊對於該鉸鏈呈幾何45度· 18 . —種空間光調變器,包含: -30- 本紙張尺度適用中國國家標準(CNS > A4規格(210X297公釐) A8 B8 C8 D8 々、申請專利範圍 a) —個基片; b) 定址電器回路包含一個提供在鄰接該基片的第一個部 份和一個駐在一個由該第一個部份所定義的平面之上的 第二個部份; . c) 一個軛被支撐在該定址電器回路的第一個部份上; d) 至少一個鉸鏈連接到該軛並支撐該軛,該鉸鏈允許該 轭的歪斜;與 · e) —個提高在上並由該軛所支撐的_素,該圖素位在会 提高的定址電器回路的第二個部份上· ---------^--- (請先閲讀背面之注意事項再填寫本頁)·. 訂 ·" 經濟部中央標準局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS > A4規格(210X297公釐}
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EP0738910B1 (en) 2005-01-26
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DE69634222T2 (de) 2006-01-05
CA2173637C (en) 2007-07-17
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US5535047A (en) 1996-07-09

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