TWI828742B - 用於提供站對站均勻性的方法及設備 - Google Patents

用於提供站對站均勻性的方法及設備 Download PDF

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TWI828742B
TWI828742B TW108130399A TW108130399A TWI828742B TW I828742 B TWI828742 B TW I828742B TW 108130399 A TW108130399 A TW 108130399A TW 108130399 A TW108130399 A TW 108130399A TW I828742 B TWI828742 B TW I828742B
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gas
manifold
conduction valve
variable conduction
source
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TW202024386A (zh
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艾里恩 拉芙依
普爾基特 艾嘉沃
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美商蘭姆研究公司
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Abstract

本發明係提供一種基板的處理設備。提供第一氣體源。第一氣體歧管係連接至該第一氣體源。第二氣體歧管連接至該第一氣體源。第一處理站具有第一氣體出口,其中該第一氣體出口係連接至該第一氣體歧管。第二處理站具有第二氣體出口,其中該第二氣體出口係連接至該第二氣體歧管。第一可變傳導閥係沿著該第一氣體歧管而介於該第一氣體源及該第一氣體出口之間。第二可變傳導閥係沿著該第二氣體歧管而介於該第一氣體源及該第二氣體出口之間。

Description

用於提供站對站均勻性的方法及設備
本揭露內容係涉及半導體裝置的形成。具體而言,本揭露內容係關於一系統內之半導體裝置的形成,而該系統內有複數個站共享一氣體源。
在基板處理中,當不同的站共享同一氣體源時,並非總能達成站對站的均勻性。不受理論的束縛,吾人相信站與站之間的差異(例如氣流系統中的不同阻力、不同體積、不同功率或不同溫度)會導致在不同站中晶圓處理上的差異。
為了實現前述目的並根據本揭露內容的目的,在此提供了一種處理基板的設備。提供第一氣體源。第一氣體歧管係連接至該第一氣體源。第二氣體歧管連接至該第一氣體源。第一處理站具有第一氣體出口,其中該第一氣體出口係連接至該第一氣體歧管。第二處理站具有第二氣體出口,其中該第二氣體出口係連接至該第二氣體歧管。第一可變傳導閥係沿著該第一氣體歧管而介於該第一氣體源及該第一氣體出口之間。第二可變傳導閥係沿著該第二氣體歧管而介於該第一氣體源及該第二氣體出口之間。
在另一種實施中,提供了一種處理堆疊的設備。提供第一氣體源。第一氣體歧管係連接至該第一氣體源。具有第一氣體出口之第一處理站,其中該第一氣體出口係連接至該第一氣體歧管。第一可變傳導閥沿著該第一氣體歧管而介於該第一氣體源及該第一氣體出口之間。
在另一個實施中,提供一種處理複數堆疊的方法,於一處理系統中包含:第一氣體源; 連接至該第一氣體源的第一氣體歧管; 連接至該第一氣體源的第二氣體歧管; 具有第一氣體出口之第一處理站,其中該第一氣體出口係連接至該第一氣體歧管; 具有第二氣體出口之第二處理站,其中該第二氣體出口係連接至該第二氣體歧管; 第一可變傳導閥,其沿著該第一氣體歧管而介於該第一氣體源及該第一氣體出口之間; 第二可變傳導閥,其沿著該第二氣體歧管而介於該第一氣體源及該第二氣體出口之間; 第一混合歧管,介於該第一氣體歧管及該第一氣體出口之間,其中該第一可變傳導閥介於該第一氣體源及該第一混合歧管之間; 第二混合歧管介於該第二氣體歧管及該第二氣體出口之間,其中該第二可變傳導閥介於該第一氣體源及該第二混合歧管之間; 第三氣體歧管連接於該第二氣體源及該第一混合歧管之間; 第四氣體歧管連接於該第二氣體源及該第二混合歧管之間; 第三可變傳導閥,其沿著該第三氣體歧管而連接於該第二氣體源及該第一混合歧管之間; 第四可變傳導閥,其沿著該第四氣體歧管而連接於該第二氣體源及該第二混合歧管之間; 第五可變傳導閥,其介於該第一混合歧管及該第一氣體出口之間;以及第六可變傳導閥,其介於該第二混合歧管及該第二氣體出口之間,該方法包含:調整該第一可變傳導閥、該第二可變傳導閥、該第三可變傳導閥、該第四可變傳導閥、該第五可變傳導閥、該第六可變傳導閥,以提供該第一處理站與該第二處理站之間之較佳均勻性。
以下將在本揭露內容的詳細描述結合以下附圖來更詳細地描述本揭露內容的這些和其他特徵。
現在將參考如附圖所示之本揭露內容的一些較佳實施例來詳細描述本揭露內容。在以下描述中,闡述了許多具體細節以便提供對本揭露內容的透徹理解。然而,對於熟習本技藝者將顯而易見的是,可以在沒有一些或所有這些具體細節的情況下實施本揭露內容。在其他情況下,未詳細描述週知的處理步驟和/或結構,以免不必要地模糊本揭露內容。
圖1為一實施例的示意說明圖。在本例中,提供具有第一氣體源104和第二氣體源108的系統。第一氣體源104連接到第一可變傳導閥112和第二可變傳導閥116。可變傳導閥(variable conductance valve)是一種提供可調節流量阻力的閥。第二氣體源108連接到第三可變傳導閥120和第四可變傳導閥124。該系統更包含第一處理站128和第二處理站132。第一處理站128具有第一氣體出口136。第二處理站132具有第二氣體出口140。第五可變傳導閥144連接到第一氣體出口136。第六可變傳導閥148連接到第二氣體出口140。第一混合歧管152連接到第五可變傳導閥144。第二混合歧管156連接到第六可變傳導閥148。第一歧管160連接在第一可變傳導閥112和第一混合歧管152之間。第二歧管164連接至第二可變傳導閥116和第二混合歧管156之間。第三歧管168連接在第三可變傳導閥120和第一混合歧管152之間。第四歧管172連接在第四可變傳導閥124和第二混合歧管156之間。在此段落中,所述連接是流體連接,其允許流體從第一項目流到第二項目。例如,由於第一混合歧管152連接至第五可變傳導閥144,因此例如氣體的流體能夠從第一混合歧管152傳遞至第五可變傳導閥144。此外,由於流體可以通過第一歧管160、第一混合歧管152和第五可變傳導閥144而自第一可變傳導閥112流到第一氣體出口136,第一可變傳導閥112便連接到第一氣體出口136。
圖2是可用於實施例中之第一處理站128的處理室的示意圖。在一或多個實施例中,第一處理站128包含在腔室249內被腔室壁252包圍之呈配送板形式的第一氣體出口136以及晶圓支座208。在腔室249內,基板203位於晶圓支座208上方。邊緣環209圍繞晶圓支座208。支座溫度控制器250連接至晶圓支座208。射頻(RF)源230提供RF功率至上部電極,該上部電極在本實施例中為第一氣體出口136。在例示性實施例中,使用400 kHz、13.56 MHz以及可選地 2 MHz、27 MHz的電源來構成RF源230。在本實施例中,晶圓支座208接地。在本實施例中,為每個頻率提供一個產生器。在其他實施例中,產生器可以是不同的RF源,或者各自的RF產生器可以連接到不同的電極。例如,上部電極可以具有連接到不同RF源的內電極和外電極。在其他實施例中可以使用RF源和電極的其他佈置。控制器235可控制地連接到RF源230、排氣泵220和支座溫度控制器250。這種腔室的一個例子是由加州弗里蒙特的Lam Research Corporation所製造的StrikerTM Oxide系統。
圖3顯示電腦系統300的高階方塊圖,電腦系統300適於實現實施例中使用的控制器235。該電腦系統可以具有許多實體形式,範圍從積體電路、印刷電路板、小型手持設備到大型超級電腦。電腦系統300包含一或多個處理器302、且還可以包含電子顯示裝置304(用於顯示圖像、文字和其他資料)、主記憶體306(例如隨機存取記憶體(RAM))、儲存裝置308 (例如硬碟)、可卸除式儲存裝置310(例如光碟機)、使用者介面裝置312(例如鍵盤、觸控式螢幕、小鍵盤、滑鼠或其他指向裝置等)以及通信介面314(例如無線網路介面)。通信介面314允許軟體和資料經由連結而在電腦系統300和外部設備之間傳輸。該系統還可以包含上述裝置/模組所連接到的通信基礎設施316(例如通信匯流排、交越帶(cross-over bar)或網路)。
經由通信介面314所傳輸之資訊可例如為下列信號形式:電子、電磁、光、或其他能經由通信連結(其可傳送信號且可使用電線或電纜、光纖、電話線、行動電話連結、射頻連結、及/或其他通信通道來實現)而被通信介面314所接收之信號。有了此類通信介面,預期一或更多之處理器302在執行上述方法步驟的過程中,可從網路接收資訊或可輸出資訊到網路。此外,本發明之方法實施例可僅於這些處理器上執行、或可在網路(如網際網路)上會同遠端處理器(其分擔一部分的處理)來執行。
用語「非暫時性電腦可讀媒體(non-transient computer readable medium)」一般用於指示如主記憶體、輔助記憶體、可卸除式儲存器、以及儲存裝置(例如硬式磁碟機、快閃記憶體、磁碟機記憶體、CD-ROM、以及其他形式之永久記憶體)之媒體,而且不應理解為涵蓋暫時性標的(例如:載波或信號)。電腦碼的例子包含:例如由編譯器產生之機器碼、以及由電腦利用直譯器所執行之含有較高階編碼的檔案。電腦可讀媒體亦可為藉由包含在載波中之電腦資料信號來傳送並代表由處理器所執行之指令序列的電腦碼。
圖4是在實施例中使用之方法的高階流程圖。在第一處理站128及第二處理站132中處理複數個基板203(步驟404)。基板203可以是測試晶圓,例如空白晶圓或用於測試之具有堆疊及/或裝置於其上的晶圓。測量已處理的基板203,以測量和判定站對站的均勻性(步驟408)。調節第一、第二、第三、第四、第五和第六可變傳導閥112、116、120、124、144和148以改變流量阻力而調節流率以改善站對站的均勻性(步驟412) 。如果需要更多的測試來檢查改變的結果(步驟416),則返回步驟404。否則,第一處理站128和第二處理站132便用於處理生產中的基板203(步驟420)。基板203可以是用於生產裝置而不是用來測試站的生產晶圓。
在上面的例示處理室中,第一處理站128和第二處理站132用於矽氧化物(SiO2 )的原子層沉積。在上述例示中,第一處理站128係與第二處理站132處於不同的處理室。在上述範例及其他類型的基板處理中,當不同的站共享同一氣體源時,並非總能達成站對站的均勻性。不受理論的束縛,吾人相信站與站之間的差異(例如氣流系統中的不同阻力、不同體積、不同功率或不同溫度)會導致在不同站中晶圓處理上的差異。出乎意料地,我們發現透過使用不同的可變傳導閥來改變氣流的阻力,可以改善站對站的均勻性,即使該不均勻性係因處理室中的不同而非因氣流系統中之阻力的不同所引起。
在其他實施例中,不同數量的站可以分享共用的氣體源。在一些實施例中,一個腔室中可以有一個以上的處理站。其他實施例可以具有不同數量的氣體源。例如,一個實施例可以具有用於兩個或更多個處理站的單一個氣體源。另一個例示可以具有用於兩個或更多個處理站的三個或更多個氣體源。
在一些實施例中,可變傳導閥可以是被設計成調節可變傳導閥中之阻力的蝶形閥。在其他實施例中,可以使用一系列不同尺寸的孔來調節阻力以提供可變傳導閥。在一些實施例中,可變傳導閥可以被機械式地調節。在其他實施例中,可變傳導閥可以被電子式地調節。可以透過控制器235來調節電子調節的可變傳導閥。對基板的處理、測量經處理之基板、透過控制器235來調節可變傳導閥、然後處理額外基板,提供了反饋迴路。第一氣體源104可以具有質量流量控制器。第二氣體源108可具有質量流量控制器。由於質量流量控制器係設定為提供流率,而可調節之可變傳導閥提供可調節的流量阻力,因此可變傳導閥與質量流量控制器係分離且不同的。
在另一例中,單一處理站可以連接到一或多個氣體源,並且在單一處理站和一或多個氣體源之間具有可變傳導閥。在此例中,即使該單一處理站不與其他單個處理站共享氣體源,可變傳導閥的存在也可用於改善站對站的均勻性。對於處理可以提供一配方。該配方可用於多個站。如果上述站的容積不同或未正確量測加熱器,所提供之配方將與另一站的結果不同。吾人相信,調節可變傳導閥可用於補償例如容積或溫度的差異。這樣的補償會讓該處理站針對給定的配方提供與其他處理站更均勻的結果。
在另一實施例中,四個處理站可以在單一處理室中共享氣體源。圖5A是具有四個處理站之處理室500的俯視剖視圖。處理室500具有腔室壁504。圖5B為該腔室的剖視側視圖。腔室壁504內有四個基板508位於處理室500內之四個處理站。每一處理站包含用於支撐基板508的基座512、用於提供氣體至基板508的氣體出口516以及將氣體出口516連接到可變傳導閥和混合歧管(未示出)的歧管520。
圖6是可用於圖5之處理室500的氣體輸送系統600的示意圖。在此例中,氣體輸送系統600具有第一氣體源604和第二氣體源608。第一氣體源604係與四個可變傳導閥612流體連接,因為在此例中,第一氣體源604是在四個處理站(未示出)的四個氣體出口516之間共享。第二氣體源608係與四個可變傳導閥616流體連通。如圖所示,四個氣體出口516中的每一個係透過歧管520而連接至可變傳導閥620及混合歧管624。每個混合歧管624係透過歧管628而連接到與第一氣體源604流體連通的可變傳導閥612,並且透過歧管632而連接到與第二氣體源608流體連通的可變傳導閥616。
此實施例可讓連接到相同氣體源的四個處理站改善站對站的均勻性。吾人已經發現在這種系統中,站對站的不均勻性是最顯著的不均勻性來源。
雖然已經根據幾個較佳實施例描述了本揭露內容,但是仍有著落入本揭露內容範圍內的變更、修改、置換和各種替代等效物。 吾人亦應注意到有許多實現本揭露內容的方法和裝置的替代方式。 因此意圖將以下所附之申請專利範圍解釋為包含落入本揭露內容之真實精神及範圍內的所有此等變動、修改、置換和各種替代等效物。
104:第一氣體源 108:第二氣體源 112:第一可變傳導閥 116:第二可變傳導閥 120:第三可變傳導閥 124:第四可變傳導閥 128:第一處理站 132:第二處理站 136:第一氣體出口 140:第二氣體出口 144:第五可變傳導閥 148:第六可變傳導閥 152:第一混合歧管 156:第二混合歧管 160:第一歧管 164:第二歧管 168:第三歧管 172:第四歧管 203:基板 208:晶圓支座 209:邊緣環 220:排氣泵 230:射頻(RF)源 235:控制器 249:腔室 250:支座溫度控制器 252:腔室壁 300:電腦系統 302:處理器 304:電子顯示裝置 306:主記憶體 308:儲存裝置 310:可卸除式儲存裝置 312:使用者介面裝置 314:通信介面 316:通信基礎設施 404:步驟 408:步驟 412:步驟 416:步驟 420:步驟 500:處理室 504:腔室壁 508:基板 512:基座 516:氣體出口 520:歧管 600:氣體輸送系統 604:第一氣體源 608:第二氣體源 612:可變傳導閥 616:可變傳導閥 620:可變傳導閥 624:混合歧管 628:歧管 632:歧管
本揭露內容係透過舉例而非限制的方式來說明,且所附圖示中相同的參考號碼指稱相似的元件,其中:
圖1為一實施例的示意說明圖。
圖2是可以在一實施例中使用之處理室的示意圖。
圖3是可用於實現實施例之電腦系統的示意圖。
圖4是一實施例的流程圖。
圖5A是另一實施例的俯視剖視圖。
圖5B為圖5A所示之實施例的剖視側視圖。
圖6為用於圖5A所示之實施例中之氣體系統的示意說明圖。
104:第一氣體源
108:第二氣體源
112:第一可變傳導閥
116:第二可變傳導閥
120:第三可變傳導閥
124:第四可變傳導閥
128:第一處理站
132:第二處理站
136:第一氣體出口
140:第二氣體出口
144:第五可變傳導閥
148:第六可變傳導閥
152:第一混合歧管
156:第二混合歧管
160:第一歧管
164:第二歧管
168:第三歧管
172:第四歧管

Claims (14)

  1. 一種基板的處理設備,其包含:第一氣體源;第一氣體歧管,連接至該第一氣體源;第二氣體歧管,連接至該第一氣體源;具有第一氣體出口之第一處理站,其中該第一氣體出口係連接至該第一氣體歧管;具有第二氣體出口之第二處理站,其中該第二氣體出口係連接至該第二氣體歧管;第一可變傳導閥,其沿著該第一氣體歧管而介於該第一氣體源及該第一氣體出口之間;第二可變傳導閥,其沿著該第二氣體歧管而介於該第一氣體源及該第二氣體出口之間;第一混合歧管,其沿著該第一氣體歧管而介於該第一可變傳導閥及該第一氣體出口之間;第二混合歧管,其沿著該第二氣體歧管而介於該第二可變傳導閥及該第二氣體出口之間;第二氣體源;第三氣體歧管,連接於該第二氣體源及該第一混合歧管之間;第四氣體歧管,連接於該第二氣體源及該第二混合歧管之間;第三可變傳導閥,其沿著該第三氣體歧管而連接於該第二氣體源及該第一混合歧管之間;第四可變傳導閥,其沿著該第四氣體歧管而連接於該第二氣體源及該第二混合歧管之間; 第五可變傳導閥,其介於該第一混合歧管及該第一氣體出口之間;以及第六可變傳導閥,其介於該第二混合歧管及該第二氣體出口之間。
  2. 如申請專利範圍第1項之基板的處理設備,其更包含:第五氣體歧管,連接至該第一氣體源;第六氣體歧管,連接至該第一氣體源;第七氣體歧管,連接至該第二氣體源;第八氣體歧管,連接至該第二氣體源;具有第三氣體出口之第三處理站;具有第四氣體出口之第四處理站;第三混合歧管,連接於該第五氣體歧管、第七氣體歧管及該第三氣體出口之間;第七可變傳導閥,介於該第一氣體源及該第三混合歧管之間;第八可變傳導閥,介於該第二氣體源及該第三混合歧管之間;第四混合歧管,連接於該第六氣體歧管、第八氣體歧管及該第四氣體出口之間;第九可變傳導閥,連接於該第一氣體源及該第四混合歧管之間;第十可變傳導閥,介於該第二氣體源及該第四混合歧管;第十一可變傳導閥,介於該第三混合歧管及該第三氣體出口之間;以及第十二可變傳導閥,介於該第四混合歧管及該第四氣體出口之間。
  3. 如申請專利範圍第2項之基板的處理設備,其中更包含一處理室,其中該第一處理站、該第二處理站、該第三處理站、以及該第四處理站均位於該處理室中。
  4. 如申請專利範圍第3項之基板的處理設備,其中更包含一RF源,以提供RF功率至該處理室。
  5. 如申請專利範圍第1項之基板的處理設備,其中更包含一處理室,其中該第一處理站、該第二處理站均位於該處理室中。
  6. 如申請專利範圍第5項之基板的處理設備,其中更包含一RF源,以提供RF功率至該處理室。
  7. 如申請專利範圍第1項之基板的處理設備,其中該第一及該第二可變傳導閥提供可調整之流量阻力。
  8. 如申請專利範圍第7項之基板的處理設備,其中更包含可控地連接至該第一及該第二可變傳導閥的控制器,其中該控制器係適於調整該第一及該第二可變傳導閥之流量阻力。
  9. 如申請專利範圍第1項之基板的處理設備,其中該第一及該第二可變傳導閥為蝶形閥。
  10. 一種堆疊的處理設備,其包含:第一氣體源;第一氣體歧管,連接至該第一氣體源;具有第一氣體出口之第一處理站,其中該第一氣體出口係連接至該第一氣體歧管;第一可變傳導閥,其沿著該第一氣體歧管而介於該第一氣體源及該第一氣體出口之間;第一混合歧管,其沿著該第一氣體歧管而介於該第一可變傳導閥及該第一氣體出口之間;第二氣體源;第三氣體歧管,連接於該第二氣體源及該第一混合歧管之間;第三可變傳導閥,其沿著該第三氣體歧管而連接於該第二氣體源及該第一混合歧管之間;及 第五可變傳導閥,其介於該第一混合歧管及該第一氣體出口之間。
  11. 如申請專利範圍第10項之堆疊的處理設備,其中更包含:一處理室,其中該第一處理站係位於該處理室中;以及一RF源,以提供RF功率至該處理室。
  12. 一種處理複數堆疊的方法,於一處理系統中包含:第一氣體源;連接至該第一氣體源的第一氣體歧管;連接至該第一氣體源的第二氣體歧管;具有第一氣體出口之第一處理站,其中該第一氣體出口係連接至該第一氣體歧管;具有第二氣體出口之第二處理站,其中該第二氣體出口係連接至該第二氣體歧管;第一可變傳導閥,其沿著該第一氣體歧管而介於該第一氣體源及該第一氣體出口之間;第二可變傳導閥,其沿著該第二氣體歧管而介於該第一氣體源及該第二氣體出口之間;第一混合歧管,其沿著該第一氣體歧管而介於該第一可變傳導閥及該第一氣體出口之間;第二混合歧管,其沿著該第二氣體歧管而介於該第二可變傳導閥及該第二氣體出口之間;第二氣體源;第三氣體歧管,連接於該第二氣體源及該第一混合歧管之間;第四氣體歧管,連接於該第二氣體源及該第二混合歧管之間;第三可變傳導閥,其沿著該第三氣體歧管而連接於該第二氣體源及該第一混合歧管之間;第四可變傳導閥,其沿著該第四氣體歧管而連接於該第二氣體源及該第二混合歧管之間;第五可變傳導閥,其介於該第一混合歧管及該第一氣體出口之間;以及第六可變傳導閥,其介於該第二混合歧管及該第二氣體出口之間,該方法包含:調整該第一可變傳導閥、該第二可變傳導閥、該第三可變傳導閥、該第四可變傳導閥、該第五可變傳導閥、該第六可變傳導閥,以提供該第一處理站與該第二處理站之間之較佳均勻性。
  13. 如申請專利範圍第12項之處理複數堆疊的方法,其步驟更包含:於該第一處理站與該第二處理站中處理測試晶圓之基板;測量該等基板;以及 判定該第一處理站與該第二處理站之間的站對站均勻性。
  14. 如申請專利範圍第13項之處理複數堆疊的方法,其步驟更包含於該第一處理站與該第二處理站中處理生產晶圓之基板。
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