TW321690B - - Google Patents

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Publication number
TW321690B
TW321690B TW083105160A TW83105160A TW321690B TW 321690 B TW321690 B TW 321690B TW 083105160 A TW083105160 A TW 083105160A TW 83105160 A TW83105160 A TW 83105160A TW 321690 B TW321690 B TW 321690B
Authority
TW
Taiwan
Prior art keywords
crystal
film
temperature
junction
area
Prior art date
Application number
TW083105160A
Other languages
English (en)
Original Assignee
Fuji Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Application granted granted Critical
Publication of TW321690B publication Critical patent/TW321690B/zh

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104Forming layers
    • H01L21/02365Forming inorganic semiconducting materials on a substrate
    • H01L21/02367Substrates
    • H01L21/0237Materials
    • H01L21/02373Group 14 semiconducting materials
    • H01L21/02381Silicon, silicon germanium, germanium
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104Forming layers
    • H01L21/02365Forming inorganic semiconducting materials on a substrate
    • H01L21/02367Substrates
    • H01L21/0237Materials
    • H01L21/0242Crystalline insulating materials
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104Forming layers
    • H01L21/02365Forming inorganic semiconducting materials on a substrate
    • H01L21/02518Deposited layers
    • H01L21/02521Materials
    • H01L21/02524Group 14 semiconducting materials
    • H01L21/02532Silicon, silicon germanium, germanium
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104Forming layers
    • H01L21/02365Forming inorganic semiconducting materials on a substrate
    • H01L21/02612Formation types
    • H01L21/02617Deposition types
    • H01L21/0262Reduction or decomposition of gaseous compounds, e.g. CVD
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104Forming layers
    • H01L21/02365Forming inorganic semiconducting materials on a substrate
    • H01L21/02612Formation types
    • H01L21/02617Deposition types
    • H01L21/02636Selective deposition, e.g. simultaneous growth of mono- and non-monocrystalline semiconductor materials
    • H01L21/02639Preparation of substrate for selective deposition
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104Forming layers
    • H01L21/02365Forming inorganic semiconducting materials on a substrate
    • H01L21/02612Formation types
    • H01L21/02617Deposition types
    • H01L21/02636Selective deposition, e.g. simultaneous growth of mono- and non-monocrystalline semiconductor materials
    • H01L21/02647Lateral overgrowth
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104Forming layers
    • H01L21/02365Forming inorganic semiconducting materials on a substrate
    • H01L21/02656Special treatments
    • H01L21/02664Aftertreatments
    • H01L21/02667Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth
    • H01L21/02675Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth using laser beams
    • H01L21/02686Pulsed laser beam
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S117/00Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
    • Y10S117/903Dendrite or web or cage technique
    • Y10S117/904Laser beam
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S117/00Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
    • Y10S117/905Electron beam
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S148/00Metal treatment
    • Y10S148/048Energy beam assisted EPI growth
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S148/00Metal treatment
    • Y10S148/071Heating, selective

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Optics & Photonics (AREA)
  • Recrystallisation Techniques (AREA)

Description

321690 A7 B7 五、發明説明(1 % 乂 i f l 搿明夕背吾 本發明係關於一棰製造一多结晶半導體薄膜的方法•諸 如用作為一半導體元件之一種原始半導體材料或一種接線 材料之一多结晶矽薄膜。 舉例言之* 一棰低壓化學蒸氣沈積(CVD)方法,亦即, 稱之為一種製造一多结晶矽薄膜之方法的一種低壓情況下 之化學蒸氣沈積方法,。圖2為表示該低壓CVD方法之一概 念圖。在該圖式中,乃係將Μ其單晶矽基質11垂直設於其 上之一石英船2 3配置在被設置在一管形電爐21中之一透明 石英管22内,Κ及該石英管係被一真空排氣泵烴由一排氣 口 24及一閥門25所排氣的。而後•將該等矽基質11加熱並 經由一進入口 26及一閥門27加入矽烷(SiH4)。當將該等基 質加熱至高於該矽烷之分解.溫度的溫度時,亦即*高達 60 0至62 0*0時,才會使該矽烷在該等基質11附近之一區域 内發生熱分解,因而,將一多结晶矽薄膜沈積在該基質 11上。在本案例中,雖然於一基質加熱溫度變為4501C 時 才會使該矽烷分解,但卻係在450至600¾範圍内時才會沈 積一道非结晶矽薄膜。 然而,該項這樣生成的多结晶矽之顆粒大小乃係如此微 « 小,以致為大約為1微米或亦更小並且有一棰高密度的缺 陷存在於顆粒邊界内。如此一來,雖然僅係將它用作為一 積體雷路之一種接線材料,但它卻具有一個問題,那就是 於將它用於諸如一個二極體及一電晶體之一半導體文件之 一作用區時,亦即,當將它用於構成一接面之^種原始材 (請先閱讀背面之注意事項再填寫本頁) 装. 訂 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 83. 3. 10,000 ^21690 A7 B7 五 、發明説明( 2 料時*該元件之特性就是劣等的。該等结晶顆粒為何微小 之原因則為,由於係將作為晶體生成之起源的晶核製造在 質之各部分中,故晶體之數目頗大並當它們生成某種 大型尺寸時,由於其他晶粒的干援,故它們無法進一步生 成〇 由於上文說明,本發 半導體 可用作 為期 明之目 薄膜之方法,該半導體 的為提供一種製造一多结晶 薄膜具有一種大顆粒尺寸並 為一種供一半導體元件之一作用 經濟部令夹樣隼馬R工消f合阼社"說 導體薄 積於一 同距離 ’ Μ及 结晶區 化區之 用作為 期保持 魟外線 為矽。 於將 化區之 區域上 核心並 達成上述 膜的方法 基質上, 之多個區 藉以一種 之整個區 溫度高於 使該非结 該结晶化 照射其整 目的計 所包括 藉Μ光 域將該 化合物 域上生 該非结 晶半導 區之溫 個區域 一種根據本發 之步驟為將一非 線照射 非结.晶 氣體之 成一多 晶區之 體薄膜 度高於 。霣施 予Μ相互 半導體薄 熱分解在 结晶層, 溫度。可 施Μ部分 該非结晶 中之較佳 區的材 明製造 结晶半 分離並 膜施Κ 該结晶 同時並 將紅外 結晶化 區之溫 者為該 料。 一多结晶半 導體薄膜沈 具有大致相 部分结晶化 化區及該非 保持該结晶 線或可見光 的光線。為 度計 > 可Μ 半導體基質 (請先閲讀背面之注意事項再填寫本頁) 装 、1 該非結晶半導體薄膜施Κ结晶化同時並保持該结晶 溫度高於該非结晶區之溫度而後藉熱分解在其整個 生成一多结晶層時,一高溫之结晶化區才會變成一 可生成具有一低表面密度之晶粒之一多结晶半導體 -5 - 本紙張尺度適用中國國家標準(CNS ) A4規格(210X29*7公釐) 83. 3. 10,000 經濟部中央橾芈局員工消費合作社印裂 321690 A7 B7 五、發明説明(3 ) 薄膜,因而,可增加晶體之大型。由於該结晶化區所具有 之吸收係數就紅外線言大於非结晶區者很多’故易於保持 該结晶化區之溫度高於該非结晶區之溫度*其方法為Μ紅 外線照射其整個區域。 _忒夕簡里說明 圖1(a)至1(e)為依次表示根據本發明之一具體實例製造 一多结晶矽薄膜之步驟的斷面圖。 圖2為表示用Μ製造一多结晶矽薄膜之一種傳统式裝置 之一斷面圖。 較住亘髁管例少詳钿說明 茲將一種製造根據本發明之一多结晶半導體薄膜的方法 之較佳具體實例參照附圓詳细說明之。 圖1(a)至1(e)為表示一種根據本發明之一具體實例將一 多結晶矽薄膜製造於一透明石英玻璃基質上之方法的構想 之圖形。首先,在Μ —種諸如丙嗣或甲酵的有機溶劑冲洗 —透明石英玻璃基質1同時並予Κ施加超音波後,由去離 子化水清洗該基質並予Μ變乾。根撺圖1(a)中所表示的· 藉一種電漿化學蒸氣沈積(CVD)方法將大約0.5微米厚度之 一層非结晶矽薄膜2生成在此基質1上,按此種方法係Κ 矽烷氣體產生輝光放霣。其生成條件為基質溫度為250 Ό ,矽烷流率為每秒20cc (—種檷準狀態中之變換數值), 其反應室中之氣備壓力為50粑,以及輝光放電之功率密度 為每平方公分15毫瓦。此外,並係Μ每秒20 cc之流率(一 種標準狀態中之變換數值)加入氫作為矽烷之--種稀釋氣 -6- (請先閲讀背面之注意事項再填寫本頁) 装 訂 本紙張尺度適用中國國家標準(CNS ) Μ規格(2丨〇><297公釐) 83.3· 10,000 , > )本年月 |補充 中文 £. 6 0號專利由請案 書修正頁(8 fi年fi月) A7 B7 經濟部中央標隼局貝工消費合作社印製 五、發明説明(么) 體。在這些條件下,其非结晶矽之生成率為每秒0 . 3 n m。 而後,將包含此種這樣生成非结晶矽薄膜之樣本配置在 X Y雙軸之一可動级上。根據圖1 ( b )中所表示的,雖然係K 箭頭3之方向及Μ與其垂直之方向移動該基質1 ,但卻係 甬一光束4來照射它,該光束為一 Q開關脈衝振盪型Y AG 雷射之二次詣波(波長ό . 5 3 2微米)之一光學脈波,此種雷 射係被一凸彫透鏡所凝聚並通過一隙縫,因而,使相互分 離之禊數之1 0微米X 1 0微衆之區域5结晶為長度及寬度各 為5 0微衆。該雷射波束之照射條件為其強度為每平方公分 2焦耳i .Π,其哌波寬為1 45塵秒(n s ),Μ及其重覆頻率為 7千赫。 其次,才將包含圖1 ( b)所示該部分结晶化區5之樣本予 Μ插入一紅外光燈加熱爐內,並K來自圖1 ( c)所示之一紅 外光燈的紅外線6用氣體壓力1 0 0粑的矽烷照射其整個表 面。波長為1 . 2微米之該紅外線的光吸收係數就該结晶化 區5之多结晶矽言為1 0 2 c m - 1,而就其他區域2之非结晶 矽言它為1 c πΤ 1或者更小,後者的光吸收係數小於前者達 兩個等級或者更大,因而,才會將該等结晶化區5施Κ選 擇性加熱並Μ自其所來之熱傳導將該非结晶矽區2加熱。 藉利吊該非结晶矽薄膜之紅外線的光吸收係數Κ及該多结 晶矽薄_之紅外線的光吸收係數計算所產生之熱量並根據 該熱量解答一導熱方程式時,所曾發現的,那就是藉具有 此穐強度之紅外線所達成之該结晶化區的溫度才會成為大 約β 3 (ΓΠ ,而藉此種強度所達成之基質及非结晶區之溫 本紙張尺度適用中國國家標準(CNS ) A4規格(210><297公釐) n - - - - - m ^ I 訂 (請先閲讀背面之注意事項再填寫本頁) 321690 A7 _____B7 五、發明説明(5 ) 度則係成為大約5 50 Ό 。實際上,根據圖1(d)中所表示的 ,在該非结晶區之溫度成為大約5001C之條件下,所已察 覺的,那就是一層多结晶矽薄膜7係由一種部分熱化學蒸 氣沈積所生成。並且在該等區域5中觀察到該棰熱化學蒸 氣沈積,該等區域係由來自該YAG雷射之光學脈波所结晶 化的。也就是說,所已察覚的,為曾發生過選擇性晶體生 成,同時並曾將3亥等结.晶化區充作為晶體生成之核心。當 該項多结晶矽生成時,該非结晶矽之面積會減少以及多结 晶矽之面積埔加,因而,使該樣本所得之紅外線的平均吸 收量增加Μ及該基質之溫度增加。如此一來,測量該基質 溫度之方法為利用一紅外光福射溫度計,因而,使該紅外 線之強度受到反饋控制。根據圖1(e)中的表示,大約50微 米厚度之多结晶矽薄膜7才..會以此種方法生成在該非结晶 矽薄膜2之整個表面上。該多结晶矽薄膜7係由一光學顯 微鏡所察費的,並曾觀察到其平均顆粒大小為大約50微米 之極大晶體顆粒。亦即,所曾發現的,那就是根據本發明 *與傅统方法比較時,會顯著增加該多结晶矽薄膜之顆粒 大小0 在上文具體實例中,所使用的為透明石英基質1 。不過 观 經濟部中央標準局員工消費合作社印製 ,如係它並無其表面上之Si晶核,其熱膨脹係數係接近矽 之熱瞭脹係數,以及熱傳導係數為低小時,則可採用其化 基質。舉例說吧,即使該基質為如此情形,Μ致一道二氧 化矽(Si02)薄膜係藉熱化學蒸氣沈積所構成在一單晶矽基 質上或者將一道二氧化矽(Si 〇2)薄膜由熱化學蒸氣沈積製 83. 3.10,000 (請先閲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(210 X 297公釐) 經濟部中央揉準局員工消費合作社印製 A7 ____ B7 五、發明説明(6 ) 造在一金靡層矽基上時,仍可獲得相同结果,該金屬層矽 基質此一半導體層矽基質在純度上低得很多但卻便宜多了 。然而,由於該結晶化區與非结晶區之間的溫度差就具有 一低吸收量之紅外線的基質言可為頗大,愛用的方式為挨 用單晶矽基質。 而且,作為用以使該非结晶矽薄膜施κ部分结晶化之光 學脈波時,即使照樣,或者在將它截斷予Μ變為間敗性射線 Μ後採用來自一連縝波型雷射的可見光,例如,來自一氬 離子雷射之波長為515 nm的可見光或者比前者更短且波長 為488 nn的可見光時,仍可獲得相同结果。在此種案例中 ,根據該連續射線,與上述具體實例相反的,為將該非結 晶矽層施Μ線性結晶化。無須說明的,那就是一柱用過的 雷射波束之波長為如此方式,即該非结晶區處之光吸收係 數頗大。 不用圖1 (c)中所示紅外線6的照射時,可將一能量波束 部分地加至該結晶化區5 ,以使該區加熱。在此種情形中 ,由於係加大該结晶化區5 ,故必須延伸照射區。 根據本發明,係將一非结晶半導厢薄膜藉光線照射施Μ 部分结晶化,Μ及將該结晶化區施以選擇性加熱至超過一 焦 種原始材料化合物氣賭之熱分解溫度Μ上的溫度*以進行 該選擇性熱化學蒸氣沈積,因而,可獲得由Κ該结晶化區 之核心所生成之大型多晶si所構成之一層半導體薄膜。如 此一來,才可製造可予Μ用作為一半導體元件之一作用區 之一種原始材料之一道多结晶半導體薄膜。 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 83.3.10,000 装-- .( (請先閱讀背面之注意事項再填寫本頁) .tx 旅

Claims (1)

  1. ^ Λ· 中文由請專 利申請p 引範圍修正本(86年β月) Α8 Β8 C8 D8 六、申請專利範圍 經濟部中央標準局員工消費合作社印褽 為 離施 结個 表晶 之 膜照 膜線 瞑該。 驟 距膜 在等 個结 體 薄之 薄光 薄持度 步 同薄 成該;整非 氣 體線 體見 體倮溫 之 相體 生持度之別 物 導外 導可 導來之 括 ·,致導 層保溫區個 合半紅 半一 半區區 包 上大半 晶並之晶等 化 晶一 晶藉 晶化晶 所 質段晶 结時區结該 該 结藉 结膜 结晶结 , 基一结 多同晶非於 於 多膜 多薄 多结非 法 一有非 道,结該高 高 一薄 一體 一等別 方 在具該 一上非與度 度 造體 造導 造該個 之 積並將 將面別區溫 溫 製導 製半 製射等 膜 沈離區 解表個化之 之 述半 述體 述照該 薄 膜分膜 分個等晶區 區 所晶 所晶。所束於 體薄互薄 熱整該结化 化 項结 項结的項波高 導 體相髑 之一於該晶 晶 1 非。1 非化 1量度 半導以導及體之高射结 结 第該的第該晶第能溫 晶半予半以氣區度照別 別 圍將化圍將结圍 1 之 结 晶射晶.,物晶溫線個 涸。範係晶範係分範將區 多结照结'化合结之外等 等度利中結利中部利_化 I 非線非晶化非區紅該;該溫專其分專其以專係晶 造層光該结種與化一持度持解請,部請,施請-结 製 I 將菀分一區晶將俘溫保分申法以申法射申法別 種將藉多部藉化结藉來之藉熱據方胞撺方照撺方個 一: 之以 晶別 面區 一根之射根之之根之等 (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 ) Α4規格(210X297公釐) 六、申請專利範圍 5 6 A8 B8 C8 D8 膜 薄 體 導 半 晶 结。 多成 一 製 造矽 製由 述係 所瞑 項薄 1 體 第導 圍半 範該 利中 專其 請 ’ 申法 據方 根之 膜 薄 體 導 半 晶 结 。 多成 一 製 造烷 製矽 述由 所體 項氣 1 物 第合 圍化 範該 利中 專其 請 , 毕法 撺方 根之 (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部中央標準局貝工消費合作社印製 本紙張尺度適用中國國家標準(CNS〉A4規格(210X297公釐)
TW083105160A 1993-06-16 1994-06-07 TW321690B (zh)

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