TW201123368A - Image sensor package structure with low transmittance encapsulation - Google Patents

Image sensor package structure with low transmittance encapsulation Download PDF

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Publication number
TW201123368A
TW201123368A TW098146151A TW98146151A TW201123368A TW 201123368 A TW201123368 A TW 201123368A TW 098146151 A TW098146151 A TW 098146151A TW 98146151 A TW98146151 A TW 98146151A TW 201123368 A TW201123368 A TW 201123368A
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Taiwan
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image sensor
sensor package
package structure
low transmittance
lens
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TW098146151A
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English (en)
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TWI425597B (zh
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Hsiu-Wen Tu
Chung-Hsien Hsin
Chun-Hua Chuang
Ren-Long Kuo
Chin-Fu Lin
Young-Houng Shiao
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Kingpak Tech Inc
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Priority to TW098146151A priority Critical patent/TWI425597B/zh
Priority to EP10187114A priority patent/EP2341540A3/en
Priority to US12/947,970 priority patent/US8928104B2/en
Publication of TW201123368A publication Critical patent/TW201123368A/zh
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Publication of TWI425597B publication Critical patent/TWI425597B/zh

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201123368 六、發明說明： 【發明所屬之技術領域】 本發明係為一種具有低透射比膠體之影像感測器封裝結 構，特別為一種應用於改善影像感測效果之影像感測器封裝结 構。 … 【先前技術】 隨著各種數位影像產品的問世及普及化，應用於數位影像 產品例如數位相機、手機相機、影像電話…等的影像感測器的 需求量也逐漸增加。影像感測器的作用原理為將所接收的光訊 號轉換成電訊號，並利用外部裝置分析電訊號，以使得影像感 測器可整合於電子產品中，進而提供照相、攝影…等功能。 第1A圖係為習知之影像感測器封装結構1〇之分解示意 圖。第1B圖係為第ία圖之結合示意圖。 如第1A圖所示，習知影像感測器封裝結構l〇(Image sensor package)主要是將影像感測晶片U(Sensor chip)放置於 基板12上，並使影像感測晶片11與基板12電訊連接，以使 得影像感測晶片u <透過基板12與外部裝置進行電訊連接。 而影像感測晶片u上町設置一透鏡級13，藉以利用透鏡組13 調整光學聚焦的位置，以使得焦點恰可落在影像感測晶片11 上，進而達到較佳的影像感測效果。 如第1A圖及第1B圖所示’為了避免光線由影像感測器 封裝結構1〇的側邊入射進入影像感蜊器封裝結構10，而造成 光線在影像感測器封裝結構10中發生多重折射、反射及散射’ 201123368 進而影響影像感測效果，町藉由一遮光罩14套設於透鏡組13 之外，用以阻絕外界的光線]以維持影像感測器封裝結構1〇 的影像感測效果。而且影像感測器封裝結構丨〇可先焊接到印 刷電路基板上，以固定影像感測器封裒結構，之後再將遮光罩 14罩住影像感測器封裝結構並固定於印刷電路基板上。 雖然使用遮光罩I4可改善影像感測效果，但是在組裝遮 光罩14時卻也產生元件對位等組裳技術的問題，另外由於需 #要額外使用遮光罩14用以遮蔽外界環境的干擾光源，因此不 但增加了材料成本，而且還提高了影像感測器封裝結構1〇的 製程複雜度。 【發明内容】 本發明係為一種具有低透射比膠體之影像感測器封裝結 構，其係藉由低透射比膠體封裴影像感測器封裝結構，以利用 低透射比膠體阻隔外界光源，進而避免發生側邊漏光的現象。 鲁 本發明係為一種具有低透射比膠體之影像感測器封裝結 構，由於低透射比膠體具有不易使光線穿透之特性，因此可防 止光線由側邊漏光並入射至影像感測器中所造成的光線多重 折射、反射及散射的現象，進而達到確保影像感測品質之功效。 本發明係為一種具有低透射比膠體之影像感測器封裝結 構，其係利用低透射比膠體取代習知之遮光罩，以減少影像感 測器封裝結構所需之元件數量，進而簡化組裝之複雜度及降低 材料成本。 為達上述功效，本發明係提供一種具有低透射比膠體之影 201123368 像感測器封裝結構，其包括：一基板，其具有一承載面及一底 面，並且承載面上設置有複數個第一導電接點；一晶片，其具 有：一第一表面，其係結合於承載面上；一第二表面，其係具 有一感光區；以及複數個第二導電接點，又第二導電接點係與 第一導電接點電訊連接；一透光板，其具有一第三表面及一第 四表面，並且透光板係設置於感光區之上方以形成一氣室；以 及一低透射比膠體，其係成型設置於基板上，並且包覆住晶片 及透光板的四周。 藉由本發明的實施，至少可達到下列進步功效： 一、藉由低透射比膠體封裝影像感測器封裝結構，以避免外界 光線經由側邊漏光，進而降低影像感測成像品質的現象。 由於低透射比膠體具有不易使光線穿透之特性，因此可達 到確保影像感測成像品質之功效。 *' 任'何熟S相關枯毯去· "Γ魅·太絲'明夕ϋ ·}；!??· rin办>4«· _1占
用低透射比膠體取代習知之遮光罩，可簡化影像感測器 =裝結構的製程複雜度並可降低材料成本。
之一種具有低透射比膠體之影像感測 丨視實施例圖。第2Β圖係為第2Α圖 201123368 之俯視實施例圖。第3A圖係為本發明之一種影像感測器封裴 結構之半成品之立體分解實施例圖。第3B圖係為第3A圖中 之影像感測器封裝結構之半成品組装後，設置有攔壩80之剖 视實施例圖1 3C圖係為第3B圖中之影像感測器封農結構 之半成品成型有低透射比膠體5〇之剖視實施例圖。第4a圖（ 為本發明之另—種具有低透射比膠體之影像感測器封裝^ 之部份分解實施例圖。第4B圖係為第4A圖中
γ衫像感測器Μ 襄、…構之結合實施例圖。第4C圖係為本發明 . 心入另一種且右 民透射比膠體之影像感測器封裝結構之剖視實施例圖 圖係為本發明之一種基板20之底面22設置有焊勢 第5八 貫施態樣。第5B圖係為本發明之一種基板2〇夕☆ . 心展面22設晉 有焊墊62之第二實施態樣。第6A圖至6C圖分別 a夏 〜種點膠成型低透射比膠體之影像感測器封梦 I發月之 施例圖。 靴，，，之剖視實 如第2A圖所示，本實施例係為-種具有低透射比 影像感測器封裝結構’其包括··一基板2〇 ; 一曰^ " 日日片30 ; —透 圯板40 ;以及一低透射比膠體50。 如第2Α圖所示，基板20,其係為一般影像感測器封裝結 構所使用的基板20,例如可以是具有電路結構之雷° , 电略基板。又 基板20具有一承載面21及一底面22，其中承載面21係為美 板20的上表面，而底面22則為基板20的下矣而 ...... 衣面。基板20的 承載面21上設置有複數個第一導電接點211， Β, 阳在底面22上 則可植上複數個焊球61 (solder ball)。 由於在基板20中具有電路結構，並且電路姓 屯纷、，，〇構可使第一 201123368 導電接點211及焊球61電訊連接。因此，可利用焊球61使影 像感測器封裝結構再與其他的外部裝置進行電訊連接。 晶片30，其可以為一互補式金氧半導體（Complementary Metal Oxide Semiconductor，CMOS)影像感測晶片或一電荷搞 合元件（charge-coupled device, CCD)，以用以接收並感測光 線。如第2 A圖所示’晶片30具有一第一表面31及一第二表 面32’其中第一表面31係為晶片30的下表面，而第二表面 32則為晶片30的上表面。晶片30的第一表面31係與基板2〇 的承載面21相結合，也就是說晶片3〇可設置在基板2〇的承 載面21上，而且晶片30還可藉由一接著劑71黏附於基 的承載面21上。 此外，可同時參照第2A圖及第3八圖，晶片3〇的第二表 面32上具有一感光區321以及複數個第二導電接點322，其中 感光區321可由複數個感光元件所構成，而第二導電接點 則圍繞設置在感光區321的周圍，並且與感光元件電訊連接。 因此，可藉由-金屬導線33以打線之方式使晶片3()上的第二 導電接點322 *基板20上的第—導電接點211電訊連接; 而使得感光元件可間接地與焊球61電訊連接。 如第2A圖所示，透光板4〇，其係設置於晶片％ 區321的上方，可用以保護晶片3〇並防止污染物污染晶片3〇 上的感光區321，而且光線可诱鉍 八J遂射過透光板40並且入射至 30的感光區321上。透光板4〇且 Ά 、 攸40具有一第三表面41及一第四矣 面42，並且藉由一第一黏著屈一 層72將第三表面41黏附於晶μ 30的第二表面32上，進而覆荃#」 部町孓日日片 叩復盖感光區321的上方，以使得透 201123368 光板40與晶片30間形成一氣室34(如第3B圖所示）。又第一 黏著層72可以為一環氧樹脂，而且因為第一黏著層72係設置 於感光區321與第二導電接點322間，因此不會覆蓋到感光區 321，更不會影響到晶片30感測光線的功能。 如第2A圖及第2B圖所示，低透射比膠體50係成型設置 於基板20上’並且包覆住金屬導線33、晶片30及透光板40 的四周，而且低透射比膠體50可以模造成型設置於基板2〇 _ 上。由於低透射比膠體50可以是一黑色膠體，並且具有低光 線穿透率之特性，因此光線不易由侧邊入射進入影像感測器封 裝結構’所以可避免光線由側邊漏光進而造成光線多重折射、 反射及散射的現象’進而確保影像感測器封裝結構的影像感測 成像品質。 由於可以模造成型之方式製造影像感測器封裝結構，所以 可以大幅縮短製程的週期時間（Cycle Time)，進而提升單位時 間產出（throughput) ’並可大量以批次方式(batch_type)生產製造 •影像感測器封裝結構，用以降低製程成本。然而為避免模造成 型時，模具需直接施壓於透光板40上而造成影像感測器封裝 結構之4貝壞，因此可藉由設置至少一攔場g〇(Dam)於透光板4〇 上以使得攔壩80可在透光板40及模具之間作為擋牆。 如第2A圖及第2B圖所示，攔壩80係設置於透光板40 上，並且疋％繞設置於透光板40的第四表面42之邊緣(如第 2B圖所示），而且並不會覆蓋到晶片3〇的感光區321的上方（如 第2A圖所示），因此光線仍可順利地穿透過透光板4〇，並入 射至晶片30的感光區321上。而攔壩80可以為一環氧樹脂 201123368 (Epoxy)或一膠膜(Film)，而施作方式為先將環氣樹脂或膠 預先設置在預定的位置，並利用紫外光照射或㉟烤使二勝膜， 半固化，藉此使攔壩8〇可保持適度彈性，以幫助在、=化或 成型製程上模具可與攔壩8〇保持密接狀態。Μ造
之後可將已設置有攔壩80之影像感測器封裝結 、、 ασ放置在模具中（圖未示），模具可包括一上模具及一下模具成 其中下模具係用以承接基板20的底面22,並且與基板2〇的底 面22相接觸，而上模具的側壁則設置於基板2〇的承載面u 上’並與下模具31分別夾持住基板20的承載面21及底面22。 卜上模具内部的上表面係為一平面，並可與攔壩8〇的頂 面相接觸，以使得上模具與下模具間可形成一模穴。
低透射比膠體50可注入於模穴中，並將金屬導線33包覆 在其中，以及包覆住晶片30、透光板40及攔壩80的四周，而 且因為攔壩80可與透光板40及上模具一同構成類似擋牆的結 構，所以可用以阻隔低透射比膠體5〇，並防止低透射比膠體 50溢流至透光板40的第四表面42上。 如第3Α圖至第3C圖所示，其係為影像感測器封裝結構 之另一實施例。如第3Α圖至第3c圖所示，影像感測器封裝 結構進一步具有一支撐框架9〇，支撐框架9〇係為一框體，而 且支撐框架90具有一第五表面91、一第六表面92及一開口 93。如第3Β圖及第3C圖所示，支撐框架9〇的第五表面91 係以一第二黏著層73黏附於晶片3〇的第二表面32上，並且 第二黏著層73係設置於晶片30的感光區321及第二導電接點 322之間。 201123368 另外，如第3A圖所示，透光板40的第三表面41係結合 於支撐框架90的第六表面92上並覆蓋支撐框架90的開口 93，而且支撐框架90的開口 93又與感光區321相對設置，所 以感光區321可外露於支撐框架90的開口 93而不會被遮蔽。 如第3B圖及第3C圖所示，攔壩80可環繞設置於透光板 40的第四表面42的邊緣，以使得當低透射比膠體50模造成型 於基板20上，並且包覆住金屬導線33、晶片30、透光板40 及支撐框架90的四周時，可以利用攔壩80阻隔低透射比膠體 • 50，以避免外溢至透光板40的第四表面42上。 如第4A圖及第4B圖所示，其係為影像感測器封裝結構 之又另一實施例，其係根據第3A圖至第3C圖所示之實施例， 在透光板40的第三表面41及第四表面42分別再進一步結合 一第一透鏡94及一第二透鏡95,其中第一透鏡94及第二透鏡 95皆可以是一球面透鏡或一非球面透鏡，但第一透鏡94及第 二透鏡95之中必須要有至少一非球面透鏡，而另一個則可以 • 是球面透鏡或非球面透鏡。 如第4A圖所示，可在第二透鏡95與透光板40的第四表 面42間設置有一紅外線濾光層96,用以過濾光線中之紅外 線。更佳的是，在紅外線遽光層96上還可以進一步設置一遮 光層97,而遮光層97相對應於第二透鏡95處則形成有一透光 孔971，以維持光路徑不被遮光層97所遮蔽。 另外，如第4C圖所示，紅外線濾光層96亦可設置在第一 透鏡94與透光板40的第三表面41之間，而遮光層97仍可設 置在透光板40的第四表面42上，並且對應於第二透鏡95處 11 201123368 形成有透光孔971(圖未示）。 若是影像感測器封裝結構未設置紅外線濾光層96及遮光 層97時’攔壩80可直接設置在透光板4〇的第四表面42的邊 緣（圖未示）’而若是設置有紅外線濾光層96及遮光層97時， 攔壩80便可設置在遮光層97之邊緣四周，以阻隔低透射比腺 體50(如第4A圖至第4C圖所示）。 此外如第5A圖及第5B圖所示，基板20之底面22除了 可植上焊球61外，也可設置有焊墊62，並與基板20的電略妹 構電訊連接，以使得焊墊62可與基板20上的第一導電接點211 鲁 電訊連接（圖未示），以便利用焊墊62使影像感測器封裝結構可 與其他的外部裝置進行電訊連接。更佳的是，焊墊62可以環 繞設置於基板20的底面22之周緣(如第5A圖所示）’或是以 一陣列方式排列（如第5B圖所示）。 如第6A圖至第6C圖所示，除了可以模造成型的方式設 置低透射比膠體50外，也可以利用點膠(dispensing)成型的方 式使低透射比膠體50設置於基板20上。而且，因為使用點膠鲁 成型的方式時不需要在影像感測器封裝結構上設置攔壩8〇,所 以可降低影像感測器封裝結構整體的高度，進而有效縮小影像 感測器封裝結構整體的體積。 藉由上述各實施例之説明可知，無論是何種形式的影像感 測器封裝結構，都可以藉由利用低透射比膠體50作為封裝膠 體，以利用低透射比膠體50具有低光線穿透率之特性，以避 免光線由影像感測器封裝結構之側邊進入影像感測器封裝結 構，以防止光線在影像感測器封裝結構中多重折射、反射及散 12 201123368 射的現象’因此可達到防止外界光線干擾影像感測器封裝結構 的影像感測成像的功效。 惟上述各實施例係用以說明本發明之特點，其目的在使熟 習該技術者能瞭解本發明之内容並據以實施，而非限定本發明 之專利範圍，故凡其他未脫離本發明所揭示之精神而完成之等 效修飾或修改’仍應包含在以下所述之申請專利範園中。 【圖式簡單說明】 第1A圖係為習知之影像感測器封裝結構之分解示意圖。 第1B圖係為第1A圖之結合示意圖。 第2A圖係為本發明之一種具有低透射比膠體之影像感測器封 裝結構之部份分解剖視實施例圖。 第2B圖係為第2A圖之俯視實施例圖。 第3A圖係為本發明之一種影像感測器封裝結構之半成品之立 體分解實施例圖。 % 第圖係為第3A圖中之影像感測器封裝結構之半成品組麥 後，設置有攔壩之剖視實施例圖。 第3C圖係為第3B圖中之影像感測器封農結構之半成品模造 成型有低透射比膠體之剖視實施例圖。 第4A圖係為本發明之另一種具有低透射比膠體之影像烕測器 封裝結構之部份分解實施例圖。 第4B圖係為第4A圖中影像感測器封裝結構之結合實施例圖。 第4C圖係為本發明之又另一種具有低透射比膠體之影像感測 器封裝結構之剖視實施例圖。 13 201123368 第5A圖係為本發明之一種基板之底面設置有焊墊之第一實施 態樣。 第5B圖係為本發明之一種基板之底面設置有焊墊之第二實施 態樣。 第6A圖至6C圖分別為本發明之一種點膠成型低透射比膠體 之影像感測器封裝結構之剖視實施例圖。 【主要元件符號說明】 10 ................習知之影像感測器封裝結構 11 ................影像感測晶片 12 ................基板 13 ................透鏡組 14 ................遮光罩 20 ................基板 21 ................承載面 211..............第一導電接點 22 ................底面 30 ................晶片 31 ................第一表面 32 ................第二表面 321 ..............感光區 322 ..............第二導電接點 33 ................金屬導線 34 ................氣室 14 透光板 第三表面 第四表面 低透射比膠體 焊球 焊墊 接著劑 第一黏著層 第二黏著層 攔壩 支撐框架 第五表面 第六表面 開口 第一透鏡 第二透鏡 紅外線濾光層 遮光層 透光孔 15

Claims (1)

  1. 201123368 七、申請專利範圍： 1. 一種具有低透射比膠體之影像感測器封裝結構，其包括： 一基板，其具有一承載面及一底面，並且該承載面上設置 有複數個第一導電接點； 一晶片，其具有：一第一表面，其係結合於該承載面上； 一第二表面，其係具有一感光區；以及複數個第二導電 接點，又該些第二導電接點係與該些第一導電接點電訊 連接； 一透光板，其具有一第三表面及一第四表面，並且該透光 板係設置於該感光區之上方以形成一氣室；以及 一低透射比膠體，其係成型設置於該基板上，並且包覆住 該晶片及該透光板的四周。 2. 如申請專利範圍第1項所述之影像感測器封裝結構，其中 該基板係為一電路基板。 3. 如申請專利範圍第1項所述之影像感測器封裝結構，其中 該晶片係為·一互補式金氧半導體影像感測晶片。 4. 如申請專利範圍第1項所述之影像感測器封裝結構，其中 該晶片係為一電何耗合元件。 5. 如申請專利範圍第1項所述之影像感測器封裝結構，其中 該些第二導電接點與該些第一導電接點係利用打線之方式 以一金屬導線電訊連接。 6. 如申請專利範圍第1項所述之影像感測器封裝結構，其中 該感光區係由複數個感光元件所構成。 7. 如申請專利範圍第1項所述之影像感測器封裝結構，其中 16 201123368 該低透射比膠體係模造成型設置於該基板上。 8. 如申請專利範圍第！項所述之影像感測器封裝結構，其中 該低透射比膠體係點膠成型設置於該基板上。 、 9. 如申凊專利範圍第！項所述之影像感測器封裝結構，其 該低透射比膠體係為—黑色膠體。 10·如申請專利範圍第丨項所述之影像感測器封裝結構，其進 -步具有至少-攔壩，其係環繞設置於該第四表面之邊 _ 緣，以阻隔該低透射比膠體。 U·如申請專利範圍第1項所述之影像感測器封裝結構，其中 該第三表面係以-第一黏著層黏附於該第二表面上，並且 該第一黏著層係設置於該感光區及該些第二導電接點 間。 12. 如申請專職圍第丨項所述之影像感㈣封裝結構，其進 :步具有一支撐框架，其具有一第五表面、一第六表面及 開口，其中該第五表面係以一第二黏著層黏附於該第二 t I面上’而該第三表面係結合於該第六表面上以覆蓋該開 口，又該開口係與該感光區相對設置，並且該第二黏著層 係设置於該感光區及該些第二導電接點之間。 13. 如申請專利範圍第12項所述之影像感測器封裝結構，其中 該低透射比膠體進一步包覆該支撐框架的四周。 14. 如申請專利範圍第12項所述之影像感測器封裝結構，其進 一步具有至少一攔壩，其係環繞設置於該第四表面之邊 緣’以阻隔該低透射比膠體。 15如由太 •申請專利範圍第12項所述之影像感測器封裝結構，其進 17 201123368 一步具有：一第一透鏡，其係結合於該第三表面；以及一 第二透鏡，其係結合於該第四表面。 16. 如申請專利範圍第15項所述之影像感測器封裝結構，其中 該第一透鏡及該第二透鏡中至少一為一非球面透鏡。 17. 如申請專利範圍第15項所述之影像感測器封裝結構，其中 該第一透鏡係為一球面透鏡或一非球面透鏡。 18. 如申請專利範圍第15項所述之影像感測器封裝結構，其中 該第二透鏡係為一球面透鏡或一非球面透鏡。 19. 如申請專利範圍第15項所述之影像感測器封裝結構，其進 一步具有至少一攔壩，其係環繞設置於該第四表面之邊 緣，以阻隔該低透射比膠體。 20. 如申請專利範圍第15項所述之影像感測器封裝結構，其中 該第二透鏡與該第四表面間設置有一紅外線濾光層。 21. 如申請專利範圍第20項所述之影像感測器封裝結構，其進 一步設置一遮光層於該紅外線濾光層上，並且該遮光層對 應於該第二透鏡處係形成有一透光孔。 22. 如申請專利範圍第21項所述之影像感測器封裝結構，其進 一步具有至少一攔壩，其係環繞設置於該遮光層之邊緣， 以阻隔該低透射比膠體。 23. 如申請專利範圍第15項所述之影像感測器封裝結構，其中 該第一透鏡與該第三表面間設置有一紅外線濾光層。 24. 如申請專利範圍第23項所述之影像感測器封裝結構，其進 一步設置一遮光層於該第四表面上，並且該遮光層對應於 該第二透鏡處係形成有一透光孔。 201123368 25. 如申請專利範圍第24項所述之影像感測器封裝結構，其進 一步具有至少一攔壩，其係環繞設置於該遮光層之邊緣， 以阻隔該低透射比膠體。 26. 如申請專利範圍第1項所述之影像感測器封裝結構，其進 一步包括複數個焊球，其係設置於該底面，並使該些焊球 藉由該基板中之電路結構與該些第一導電接點電訊連接。 27. 如申請專利範圍第1項所述之影像感測器封裝結構，其進 一步包括複數個焊墊，其係設置於該底面，並使該些焊墊 藉由該基板中之電路結構與該些第一導電接點電訊連接。 28. 如申請專利範圍第27項所述之影像感測器封裝結構，其中 該些焊墊係環繞設置於該基板之底面之周緣。 29. 如申請專利範圍第27項所述之影像感測器封裝結構，其中 該些焊墊係以一陣列方式排列。
    19
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