TW202238888A - 半導體裝置 - Google Patents

半導體裝置 Download PDF

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Publication number
TW202238888A
TW202238888A TW110146699A TW110146699A TW202238888A TW 202238888 A TW202238888 A TW 202238888A TW 110146699 A TW110146699 A TW 110146699A TW 110146699 A TW110146699 A TW 110146699A TW 202238888 A TW202238888 A TW 202238888A
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Taiwan
Prior art keywords
semiconductor device
lead frame
connector
conductive member
connection portion
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TW110146699A
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English (en)
Inventor
山口翔
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日商東芝股份有限公司
日商東芝電子元件及儲存裝置股份有限公司
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Publication of TW202238888A publication Critical patent/TW202238888A/zh

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    • H01L2924/181—Encapsulation

Abstract

一實施例之一半導體裝置包含一第一引線框(22)、經定位成遠離該第一引線框之一第二引線框(23A)、經安裝於該第一引線框上之一半導體晶片(21)，及一導電部件(24A)。該導電部件(24A)透過一導電黏著劑將該半導體晶片之一電極(TG)電連接至該第二引線框。該導電部件(24A)包含經定位成遠離該電極之一接合面(50)之一切割面(34T)，該導電部件係接合於該接合面(50)上。

Description

半導體裝置
本文中描述之實施例大體上係關於一種半導體裝置。
存在一已知半導體裝置，其中一引線框及一半導體晶片之一電極由例如一板形連接器電連接。藉由導電黏著劑(諸如焊料)在電極與連接器之間及在引線框與連接器之間形成機械及電連接。
一回焊爐用於藉由運用鉛焊料將矽(Si)晶片接合至一引線框及銅(Cu)連接器且藉由模製對其等進行密封而製造之一半導體封裝的一接合程序中。
存在於一回焊程序期間具有不良焊料可濕性(solder wettability)之銅連接器引起一缺陷接頭，從而在焊接接頭可靠性方面導致一缺陷產品的問題。
一實施例之一半導體裝置包含一第一引線框、定位成遠離第一引線框之一第二引線框、安裝於第一引線框上之一半導體晶片及一導電部件。導電部件透過一導電黏著劑將半導體晶片之一電極電連接至第二引線框。導電部件包含定位成遠離電極之一接合面之一切割面，導電部件接合於該接合面上。
下文參考圖式描述實施例。在本說明書中，可以複數形式描述根據實施例之組件及組件之描述。組件及其等描述係實例且不受本說明書中之表述限制。可藉由與本說明書中之名稱不同之名稱來識別組件。亦可藉由與本說明書中之表述不同之表述來描述組件。
圖1係實施例之半導體裝置之一外部正視圖。圖2係實施例之半導體裝置之一外部後視圖。圖3係實施例之半導體裝置之一外部透視圖。例如，一半導體裝置10組態為一功率裝置(功率電晶體)。半導體裝置10不限於此實例，且可為任何其他裝置。
如圖示之各者中繪示，為了方便起見，在本說明書中定義一X軸、一Y軸及一Z軸。X軸、Y軸及Z軸彼此正交。X軸係沿半導體裝置10之一寬度提供。Y軸係沿半導體裝置10之一長度(深度)提供。Z軸係沿半導體裝置10之一厚度提供。
此外，在本說明書中定義一X方向、一Y方向及一Z方向。X方向係沿X軸之一方向，且包含由X軸之一箭頭指示之一+X方向及為X軸之箭頭之相反方向之一−X方向。Y方向係沿Y軸之一方向，且包含由Y軸之一箭頭指示之一+Y方向及為Y軸之箭頭之相反方向之一−Y方向。Z方向係沿Z軸之一方向，且包含由Z軸之一箭頭指示之一+Z方向及為Z軸之箭頭之相反方向之一−Z方向。
如圖1中繪示，半導體裝置10包含一樹脂模具11、第一連接器12、第二連接器13、第三連接器14及一第四連接器15。在此組態中，第一連接器12及第二連接器13構成一第一引線框之部分。第三連接器14用作一第三引線框，且第四連接器15用作一第二引線框。第一連接器12 (在圖1之一實例中為四個)提供為各自在−X方向上從樹脂模具11延伸。第二連接器13經提供使得其等之一者在+Y方向上且另一者在−Y方向上從樹脂模具11延伸。第三連接器14 (在圖1之實例中為三個)提供為各自在+X方向上從樹脂模具11延伸。第四連接器15提供為在+X方向上從樹脂模具11延伸。
第一連接器12及第二連接器13用作一引線框，如上文描述，且從樹脂模具11曝露(如圖2中繪示)以用於半導體晶片之散熱，此將在稍後進行描述。
樹脂模具11將第一連接器12之部分密封至第四連接器15、半導體晶片、第一引線框之部分、第二引線框及一第三引線框，此將在下文進行描述。
圖4係在模製之前實施例之半導體裝置之一正視圖。半導體裝置10包含一半導體晶片21安裝於其上之一第一引線框22。
半導體晶片21係一垂直裝置，諸如一垂直金屬氧化物半導體場效電晶體(MOSFET)。半導體晶片10不限於此實例，而是可為一垂直絕緣閘雙極電晶體(IGBT)、一垂直二極體或任何其他所要半導體晶片。
半導體晶片21含有矽(Si)作為一半導體。半導體晶片21不限於此實例，而是亦可包含不同於矽之化合物半導體，諸如SiC或GaN。
在此情況中，一閘極端子TG及一源極端子TS設置於半導體晶片21之前側(定位於+Z方向上之一側)上。閘極端子TG未攜載電流，使得閘極端子TG提供為具有小於源極端子TS之一面積。
在本實施例中，閘極端子TG在平面圖中具有一矩形形狀且係沿X軸安置。
未繪示之一汲極端子設置於半導體晶片21之後側(定位於−Z方向上之一面)上。半導體晶片21之汲極端子運用用作一導電黏著劑之鉛焊料電連接至第一引線框22。因此，半導體晶片21機械地固定至第一引線框22且藉此變成一預定熱傳導狀態。此使半導體晶片21能夠透過第一引線框22消散其熱量。
第一引線框22之三個端部(在圖4之一實例中，一左端、一頂端及一底端)構成第一及第二連接器12及13，其等用作汲極端子TD。一第二引線框23A之一個端部構成用作閘極端子TG之第四連接器15。一第三引線框23B之一個端部構成用作源極端子TS之第三連接器14。
用作一導電部件之一金屬(Cu)連接器24A運用用作一導電黏著劑之鉛焊料機械地且電氣地連接至半導體晶片21之閘極端子TG與第二引線框23A之間。
類似地，用作一導電部件之一金屬(Cu)連接器24B運用用作一導電黏著劑之鉛焊料機械地且電氣地連接至半導體晶片21之源極端子TS與第32引線框23之間。
圖5係在模製之前實施例之半導體裝置之一仰視圖，即，基於圖4之半導體裝置10之一左端視圖。如圖4及圖5中繪示，金屬連接器24A包含一連接部分31、一延伸部分32、一臂部分33及一連接部分34，其等在−X方向上朝向設置半導體晶片21之閘極端子TG之一位置安置。金屬連接器24A具有一L形。
連接部分31具有一矩形形狀，且包含設置於其之後側(−Z方向)上之一第一連接面31A。延伸部分32在−Y方向上從連接部分31延伸，且接著在−X方向上延伸以連接至臂部分33。
臂部分33連接至連接部分34同時在−X方向及+Y方向上延伸以到達閘極端子TG。連接部分34包含在後側(−Z方向)上之一第二連接面36。第二連接面36機械地且電氣地連接至閘極端子TG。
在上述結構中，金屬連接器24A之連接部分34運用用作第二連接面34A上之一導電黏著劑之鉛焊料機械地且電氣地連接至閘極端子TG。稍後將詳細描述連接部分34之連接狀態。
第二引線框23A係與第一引線框22分開定位於連接部分31之後側(−Z方向)上。連接部分31之一第一連接面31A運用用作一導電黏著劑之鉛焊料機械地且電氣地連接至第二引線框23A。因此，金屬連接器24A透過鉛焊料將半導體晶片21之閘極端子TG電連接至第二引線框23A。
如圖4及圖5中繪示，金屬連接器24B包含一連接部分41、一延伸部分42、一臂部分43及一連接部分44，其等係以在−X方向上朝向設置半導體晶片21之源極端子TS的位置安置。
金屬連接器24B具有一L形。連接部分41包含在後側(−Z方向)上之一第一連接面。延伸部分42在+Z方向上從連接部分41延伸，且接著在−X方向上延伸以連接至臂部分43。
臂部分43連接至連接部分44，同時在−X及+Y方向上延伸以到達源極端子TS。連接部分44包含在後側(−Z方向)上之一第二連接面。第二連接面係機械地且電氣地連接至源極端子TS。
在上述結構中，第三引線框23B之連接部分44運用用作一導電黏著劑之鉛焊料機械地且電氣地連接至源極端子TS。
第三引線框23B係與第一引線框22分開地定位於連接部分41之後側(−Z方向)上。連接部分41之第一連接面運用用作一導電黏著劑之鉛焊料機械地且電氣地連接至第三引線框23B。
下文描述實施例之優點。首先，將描述一習知問題。圖6係在模製之前一習知半導體裝置之問題之一說明圖。在圖6中，相同符號用於與圖5中相同零件。
在一習知金屬連接器24AP中，一連接部分31、一延伸部分32、一臂部分33及一連接部分34P係以在−X方向上朝向設置一半導體晶片21之一閘極端子TG的位置安置。連接部分31包含在後側(−Z方向)上之第一連接面。延伸部分32在−Y方向上從連接部分31延伸，且接著在−X方向上延伸以連接至臂部分33。
臂部分33連接至連接部分34同時在−X方向及+Y方向上延伸以到達閘極端子TG。連接部分34P在−X方向上沿X−Z平面筆直延伸。在連接部分34P中，機械地且電氣地連接至閘極端子TG之一第二連接面設置於連接部分34P之後側(−Z方向)上。
根據上文描述之習知結構，金屬連接器24AP之連接部分34P沿著沿X−Z平面安置之閘極端子TG延伸。連接部分34P定位於連接部分34P運用用作一導電黏著劑之鉛焊料電連接至閘極端子TG之一位置處。同時，大體上藉由在一單一程序中運用一壓機進行衝壓及彎曲而處理金屬連接器24AP。連接部分34P之大部分(尤其第二連接面)係一軋製面，而連接部分34P之一尖端部分34PT係一切割面。
因此，連接部分34P之尖端部分34PT具有大於軋製面之一粗糙度。因此，不僅在尖端部分34PT中，而且在包含由圖6中之一圓圈AR繪示之尖端部分34PT附近之區域中，用作一導電黏著劑之鉛焊料之潤濕性較差。因此，當執行回焊處理時，存在圖6中之圓圈AR之區域中出現鉛焊料之一缺陷接頭，從而導致一缺陷產品的可能性。
圖7係在模製之前實施例之半導體裝置之一側視圖。圖8係在模製之前實施例之半導體裝置之一外部透視圖。在實施例之金屬連接器24A中，如圖7及圖8中繪示，連接部分31、延伸部分32、臂部分33及連接部分34在−X方向上朝向設置半導體晶片21之閘極端子TG之一位置安置。
連接部分31包含在後側(−Z方向)上之第一連接面31A。延伸部分32在−Y方向上從連接部分31延伸，且接著在−X方向上延伸以連接至臂部分33。
臂部分33連接至連接部分34，同時在−X方向及+Y方向上延伸以到達閘極端子TG。連接部分34包含在後側(−Z方向)上之一第二連接面36。第二連接面36機械地且電氣地連接至閘極端子TG。
在上述結構中，金屬連接器24A之連接部分34沿閘極端子TG安置，即，在於X軸方向上延伸之一狀態下安置。連接部分34定位於其運用用作一導電黏著劑之鉛焊料電連接至閘極端子TG之一位置處。
如在上文描述之習知情況中，大體上藉由在一單一程序中藉由一壓機進行衝壓及彎曲而處理金屬連接器24A，且連接部分34之一尖端部分34T係一切割面。然而，在實施例之連接部分34中，尖端部分34T在與作為一待接合電極之閘極端子TG分離之一方向上逐漸彎曲，即，在+Z方向上逐漸彎曲。
圖9係金屬連接器24A之接頭之一放大圖。如圖9中繪示，連接部分34相對於臂部分33透過一彎曲部分35在圖9中逐漸向上(在Z方向上)彎曲。在此結構中，連接部分34之尖端部分34T安置成遠離閘極端子TG之一接合面50，連接部分34在接合面50上與作為一導電黏著劑之鉛焊料連接。更明確言之，連接部分34逐漸向上(在+Z方向上)彎曲，使得尖端部分34T安置於鉛焊料之表面張力不會影響尖端部分34T之一位置，即，鉛焊料未到達尖端部分34T之一位置處。
臂部分33之一下面37係由用於形成臂部分33及彎曲部分35之彎曲程序產生之一軋製面。
相對於接合面50在與尖端部分34T相反之一方向上提供彎曲部分35。彎曲部分35在閘極端子TG形成於其上之半導體晶片21之一形成面21A之一垂直方向(+Z方向)上彎曲，使得連接部分34與形成面21A分離。
因此，待接合至接合面50之連接部分34之第二連接面36及連接部分34之一下面38係由用於形成彎曲部分35之彎曲程序產生之軋製面。此容許連接部分34之第二連接面36及下面38具有遠小於連接部分34之尖端部分34T之一粗糙度。
因此，連接部分34之第二連接面36及下面38具有高可濕性。因此，運用鉛焊料之表面張力及毛細管作用，連接部分34之第二連接面36及下面38牢固地接合至閘極端子TG之接合面50。在第二連接面36及接合面50之正視圖中之形狀各自為一矩形形狀，其中連接部分34之一延伸方向係一縱向方向。運用鉛焊料之表面張力，此使得可抑制連接部分34之旋轉以甚至在回焊處理期間仍固定於一預定位置中。
此外，彎曲部分35之一下端35T上之下面38亦為由用於形成彎曲部分35之彎曲程序產生之一軋製面，且其安置於在距閘極電極TG之端部之一預定距離內(在圖9中，在−X方向上)之一側上，使得鉛焊料之表面張力引起鉛焊料到達圖9中之金屬連接器24A之左側上之閘極電極TG的表面，且金屬連接器24A可更牢固地接合，從而使得可改良金屬連接器24A之抗裂性。
如上文描述，本實施例可在不改變一製程的情況下控制回焊處理期間金屬連接器24A的行為，且抑制金屬連接器之缺陷接頭及金屬連接器之接合位置的失準。
另外，可運用用作完全散佈於第二連接面36及閘極端子TG之接合面50上方之一導電黏著劑的鉛焊料進行接合，使得可改良抗裂性。
在上文描述中，第二連接面36及接合面50之正視圖形狀各自為一矩形形狀，但從抑制金屬連接器之缺陷接頭的角度來看不限於此。
例如，任何所要形狀可被應用於第二連接面36及接合面50，諸如方形、圓形、卵形、菱形或類似者。從防止金屬連接器之回焊處理期間之旋轉的角度來看，具有一大深寬比之一形狀(例如，橢圓形、菱形等)係所要的。
在上文描述之金屬連接器24A中，彎曲部分35經提供以使連接部分34在垂直方向(+Z方向)上逐漸彎曲遠離閘極電極TG之形成面21A，且藉此切割面(34T)與接合面(50)分離。在另一實施例中，金屬連接器(24A)可被構造成不具有彎曲部分35。在此一金屬連接器中，例如，連接部分34係提供為在一水平方向(在圖7之實例中，沿X−Y平面之−X方向)上延伸，且尖端部分34T附近之區域之厚度係藉由壓緊來薄化，以在+Z方向上將尖端部分34T與接合面50分離。
此結構亦容許接合面50在其上僅具有金屬連接器24之軋製面，從而改良用作一導電黏著劑之鉛焊料的可濕性。
雖然已描述特定實施例，但此等實施例僅係藉由實例來呈現，且不意欲限制本發明之範疇。實際上，可以多種其他形式具體實施本文中描述之新穎實施例；此外，可在不脫離本發明之精神的情況下進行本文中描述之實施例之形式上的各種省略、置換及改變。隨附發明申請專利範圍及其等效物意欲涵蓋如將落在本發明之範疇及精神內之此等形式或修改。
10:半導體裝置 11:樹脂模具 12:第一連接器 13:第二連接器 14:第三連接器 15:第四連接器 21:半導體晶片 21A:形成面 22:第一引線框 23A:第二引線框 23B:第三引線框 24A:導電部件/金屬(Cu)連接器 24AP:金屬連接器 24B:金屬(Cu)連接器 31:連接部分 31A:第一連接面 32:延伸部分 33:臂部分 34:連接部分 34P:連接部分 34PT:尖端部分 34T:切割面/尖端部分 35:彎曲部分 35T:下端 36:第二連接面 37:下面 38:下面 41:連接部分 42:延伸部分 43:臂部分 44:連接部分 50:接合面 AR:圓圈 TD:汲極端子 TG:閘極端子/閘極電極 TS:源極端子
圖1係一實施例之半導體裝置之一外部正視圖； 圖2係實施例之半導體裝置之一外部後視圖； 圖3係實施例之半導體裝置之一外部透視圖； 圖4係在模製之前實施例之半導體裝置之一正視圖； 圖5係在模製之前實施例之半導體裝置之一仰視圖； 圖6係在模製之前一習知半導體裝置之一問題之一說明圖； 圖7係在模製之前實施例之半導體裝置之一側視圖； 圖8係在模製之前實施例之半導體裝置之一外部透視圖；及 圖9係一金屬連接器之一接頭之一放大圖。
10:半導體裝置
12:第一連接器
15:第四連接器
21:半導體晶片
21A:形成面
23A:第二引線框
24A:導電部件/金屬(Cu)連接器
31:連接部分
31A:第一連接面
32:延伸部分
33:臂部分
34:連接部分
34PT:尖端部分
36:第二連接面
TD:汲極端子
TG:閘極端子/閘極電極
TS:源極端子

Claims (8)

  1. 一種半導體裝置(10)，其包括： 一第一引線框(22)； 一第二引線框(23A)，其經定位成遠離該第一引線框； 一半導體晶片(21)，其經安裝於該第一引線框上；及 一導電部件(24A)，其透過一導電黏著劑將該半導體晶片之一電極(TG)電連接至該第二引線框， 其中該導電部件(24A)包含經定位成遠離該電極之一接合面(50)之一切割面(34T)，該導電部件係接合於該接合面(50)上。
  2. 如請求項1之半導體裝置，其中 該切割面(34T)係該導電部件(24A)之一個端部，及 該導電部件係在該導電部件之一軋製面處接合至該電極(TG)。
  3. 如請求項1或2之半導體裝置，其中該導電部件(24A)包含用於引起該切割面(34T)定位成遠離該接合面(50)之一彎曲部分(35)，該彎曲部分係相對於該接合面在與該切割面相反之一方向上提供。
  4. 如請求項3之半導體裝置，其中該彎曲部分(35)係在與該電極(TG)經設置於其上之一形成面(21A)垂直分離的一方向上彎曲。
  5. 如請求項1之半導體裝置，其中該接合面(50)在一正視圖中具有一矩形形狀，其中該導電部件(24A)之一延伸方向係一縱向方向。
  6. 如請求項2之半導體裝置，其中該接合面(50)在一正視圖中具有一矩形形狀，其中該導電部件(24A)之一延伸方向係一縱向方向。
  7. 如請求項3之半導體裝置，其中該接合面(50)在一正視圖中具有一矩形形狀，其中該導電部件(24A)之一延伸方向係一縱向方向。
  8. 如請求項4之半導體裝置，其中該接合面(50)在一正視圖中具有一矩形形狀，其中該導電部件(24A)之一延伸方向係一縱向方向。
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