TW567594B - Method of packaging microchip devices, the interposer used therefor and the microchip device packaged thereby - Google Patents

Method of packaging microchip devices, the interposer used therefor and the microchip device packaged thereby Download PDF

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Publication number
TW567594B
TW567594B TW091107069A TW91107069A TW567594B TW 567594 B TW567594 B TW 567594B TW 091107069 A TW091107069 A TW 091107069A TW 91107069 A TW91107069 A TW 91107069A TW 567594 B TW567594 B TW 567594B
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Taiwan
Prior art keywords
interposer
microchip
opening
gap
outside
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TW091107069A
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English (en)
Inventor
Chuen Khiang Wang
Original Assignee
Chuen Khiang Wang
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Priority claimed from SG200100220A external-priority patent/SG94734A1/en
Application filed by Chuen Khiang Wang filed Critical Chuen Khiang Wang
Application granted granted Critical
Publication of TW567594B publication Critical patent/TW567594B/zh

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    • H01L21/04Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
    • H01L21/50Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
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    • H01L23/3107Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
    • H01L23/3114Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed the device being a chip scale package, e.g. CSP
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Description

567594 五 發明說明(l) 晶ί發:t及半導體元件製造領域’更具體地說,涉及微 件中ί用二2 f ’該元件帶有在諸如印刷電路板的電子元 汁T使用的積體電路晶片。 一 _Μ 求業!對:ί本低、性能高的更小電子元件的需 t線通信領域尤其重要。具體地說, 小以及每晶片面積的電子功能元件方:u曰曰片尺寸的減 的微晶片封裝存在很強的需求。 X的增大,對非常小 微晶片元件的傳統封裝的子 和四邊引線扁平封裝(QFp)此封Λ、小外形封裝(TS0P) 數量具有固定的封裝尺寸,這此ϋ相對外部電觸點的 晶片元件與其週邊電路連接。。電觸點用於使經封裝的微 心著微晶片尺寸減小,對於微 以提高。尤其是,電信號路徑長戶二技術要求也得 電信號傳輸中的延遲。 a心m可此小以避免高速 通常,微晶片元件包括位於 點。利用非常小的引線(”引Λ曰曰片表面的非常小的焊 自動焊,ΤΑΒ )將這些電焊點鱼,=)或條帶(例如載帶 公知的。在這兩種情況下,這此&的外部觸點相連接是 械缺陷。此外,提供銷或球=二,體非常纖細並要防止機 外側與被封裝的微晶片電接觸。卩電觸點’以實現從封裝 在某些封裝系統中,電焊曰 π微晶片表面上的觸點,該 C:\2D-CODE\91-06\91107069.ptd 第5 頁
567594
觸點排列成一定的佈局,從而適於特定的封裝方法。包含 這種技術的一類封裝方法被稱作晶片尺寸封裝(chip size packaging)(CSP)。根據互連與封裝電子電路學會 (Institute for Interconnecting and Packaging Electronic CircUlts)(IPC)給出的csp的定義,所形成的 封裝表面積不大於微晶片表面積的丨· 5倍。此外,所形成 的封裝可以通過在封裝表面上外露的外部觸點而容易接 觸0 在CSP的-個新的子類中’具有多個外部觸點的内插器 (interposer)被用於封裝。外部觸點位於該内插器的外 側,該内插器具有從其外側穿過内插器延伸的縫隙。尤其 是,該縫隙具有視窗或框的形狀(視窗晶片級封裝 ^ (window chip scale packaging),wCsp) ’ 但是 ^ 也可以 在其-個或多個橫向側面開π。内插器鄰近微晶片元件佈 置或佈置在其附近’以便微晶片纟面上的電觸點可以通過 縫隙從外側觸&。此後’微晶片表面上的觸點利用 與内插器外側上的外部觸點電連接。至少一些導體在^ 内延伸,並且此後被電絕緣材料密封。csp的這種新的子' 類具有以下優點:
-用於將微晶片表面上的電觸點與外部觸點連 長度可以保持非常短,尤其在縫隙的邊緣定位於微晶I肚 件表面上的觸點附近的情況下。 凡 —在連接步驟中,内插器外側上的外部觸點將從盘 片表面上的觸點相同的一側連接,因此,佈置可以非g g
I、 凑 明(3) 〜等體由密封材料 外,^裳的外部觸點 允微晶片元件位於 i向外界的最大可 ^ ffn , ^ , 行。W,内插器相對 镇壤ίϋ,從所需位 用於也。此外,如 對内以電絕緣材料密 發二插器和微晶片元 的一個目的 許大規模生 的另一目的 4晶片元件 的另一目的 的微晶片元 提出了以下 該方法包 仏一種具有第一 供一種内插器, 插器延伸的縫隙 内插器佈置在微 保護。 可以直接連接到電路板的觸點上。此 封裝的相對表面上或該表面附近,以 能的散熱。 微晶片元件的定位必須非常精確地進 置極小的偏離會導致接觸故障和/咬 果轉移模塑(transfer moulding)被 封導體,則為了給轉移模塑作車 件進行加工會導致接觸失效=而 是提供一種封裝微晶片元件的方法, 產中的小的廢品率。 是在轉移模塑步驟過程中和之後使對 的加工更容易。 ^提供一種相應的内插器和一種相應 件。 的封裝微晶片元件的方法 電觸點的微晶片元件; 該内插器帶有第二電觸點、從外側穿 、以及從外側延伸到内插器内的分隔 日日片7L件附近’使得第一電觸點可以
C:\2D-CODE\91-O6\91107069.ptd 第7頁 567594 五、發明說明(4) 通過縫隙從外側觸及 =轉觸點電連接;以及 從-方向供給,以在f充縫隙,其中,絕 域: m縫隙之前穿過分_口的= "亥刀隔開口相對於 開口可以是不穿過内°。、方位穩定轉移模塑步驟 陷。首先,該分^二=:或者穿過内插器延伸“ ?-數量的材料進入縫= =料的容器。結果,在 會吸引位於分隔開料:,已經進入縫隙的材料 夠流量,即使來自材料货ί枓。攸而,會有進入縫隙的足 緣材料以過高的速度;其次,如果絕 個反射防護屏。對:圪2:,則分隔開口作用類似於— 材料將穿過該分隔開:應的-種解釋為:第-,絕緣 在該分隔開σ中。此後t至少—部分絕緣材料暫時儲存 分儲存的材料從該分::夕二材料到達時,至少—部 動。除此之外Z *滿忍的流量密度但速度適中的产 緣材料填充,其中以:應允許其他空腔或空間:絕 流動的Μ上。4額外的空腔或空間可以位於#料 titbit ^ a 5 ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ 牙/次被日曰片凡件的外部區域,尤其是沿内插] 第8頁 \\312\2d-code\91-06\91107069.ptd 五、發明說明(D 小或微晶片元件 v 一部分内插器和/$ =卜邊緣的橫向區域。這允許密封至 下,該分隔開口形成3微晶片元件。較佳地,在這種情況 過程中,絕緣材料在2需尺寸並被佈置,使得在轉移模塑 晶片元件的外部流動了到達縫隙之前沿著内插器和/或微 分隔開口的橫剖面、 形、方形或矩形Y 可以為任何形狀,例如圓形、狹槽 者製備多個分隔開口外,分隔開口可以再劃分,並且/或 較佳地,分隔開D式„ 佳地還有要措* t 攻開口成形並定位,使得縫隙、且較 充。 二L的相鄰部分用絕緣材料完全填 所出白ή Υ共、 分隔開口籍二刀同開口的方法的兩個主要優點為:由於 塑,並山心疋了絕緣材料的流動,從而便於進行轉移模 读立Μ a此便於加工内插器和微晶片元件;以及作為令人 二ζ、移杈塑的結果,可以保護最終的封裝免受損壞, 亚可以容易地加工該封裝。 々在一較佳實施例中,提供了至少一個電導體,以電連接 第和第二觸點。該導體從微晶片元件通過縫隙延伸,並 進一步延伸到内插器外側上的縫隙外部。在這個實施例 中’至少在縫隙外側,導體通過轉移模塑以絕緣材料密 封。在轉移模塑過程中,内插器可以至少局部由模具覆 盖’從而形成用於絕緣材料的空腔,該絕緣材料將被注入 到該空腔中。較佳地,該空腔包括開口 ,並另外還包括在 開口的所述外側上的空間’以提供完全密封至少一個導體
C:\2D-CODE\91-06\91107069.ptd $ 9頁 567594 五、發明說明(6) 的足夠空間 隔縫隙或分p : C I :夕個要用電絕緣材料填充的分 從而形縫隙區域,其巾’各孔或各區域排列成串, 且,另一2 ί移模塑過程中電絕緣材料通過的通道’並 間。所述另:t開口沿該通道佈置在兩個縫隙或區域之 入第二Μ ^ 分隔開口以與上述相似的方式使絕緣材料進 一 4隙的流動穩定。 另—Αλ ^ 縫隙自該側* :施例中’縫隙形成了沿内插器外側(即, 道允許絕浐牙過内插器延伸)延伸的至少一個通道。該通 在這個實t材料被供給到縫隙的内部或穿過縫隙的内部。 置介今二^例中,分隔開口位於通道起始處附近。這個位 i;:縫隙的特別穩定的流動。 道或多個二=例中,具有多個分隔開口,每個開口位於通 通道终二的起始處或終結處附近。 充。對此的:種i ϊ ί隔開口也有利於縫隙或空腔的完全 口用作記憔辟,*、為,材料進入該分隔開口 ,該分隔開 後續材料的速产诘偏轉後續的材料。從而,通道終結處的 此外,建噹、ΐ 1小,而材料在該區域内的沈積將增加。 楛供且:丁如下的步驟: 提供内插哭,节内#觸的微晶片元件; 點並具有從外側穿2 r在内插器外側具有多個第二電觸 桩相斟沾r =過内插器延伸的崚隙,庄中,縫隙被連 接相對的縫隙邊緣的跨 π的縫丨糸-τ 將内插器佈置在微曰=成至少兩個開口; 、 曰日片TL件附近,從而第一電觸點可以
C:\2D-C0DE\91-06\91107069.ptd 第10頁 567594 五、發明說明(7) 通過開口中 的至少第 在第一電觸點和第 開口而從外側觸及;以及 電觸點的相應觸點之間形成電連 接。 這種方案 化了縫隙區 述至少兩個 工的影響。 電觸點連接 的縫隙相比 二電觸點的 晶片元件與 較佳地, 其中第一開 施例 使得 倍, 較 移模 根 插器 在 微晶 從 少兩 中,跨 它們的 較佳地 佳地, 塑用絕 據本發 ,該内 内插器 片元件 外側延 開口 , 便於内插器 域内的内插 開口的尺寸 尤其是在兩 時,與具有 ,穩定性明 尺寸保持不 外部裝置( 跨接盡可能 口限定了用 接和連接區 距離比連接 小2倍。 和微晶 器。至 是不變 個開口 相同或 顯提高 變。因 如電路 地靠近 於定位 域内最 區域内 片元件 少在靠 的,並 都用於 相似橫 。同樣 此,可 的力口工 近跨接 且不會 將第一 咅J面或 ,内插 以減小 板)接觸的故 第一電觸點定 電導體的連接 靠近的一個電 各導體之間的 ,因為 的區域 受到内 電觸點 尺寸的 器外側 將經封 障率。 位。因 區域的 導體被 平均距 跨接強 内,所 插器加 與第二 未分割 上的第 裝的微 此,在 較佳實 定位, 離小3 在接觸第一電觸點之後,至少第一開口通過轉 緣材料填充。 明,還提出提供一種用於封裝微晶片元件的内 插器包括: 外側上的多 ,並從而與 伸到内插器 並且,開口 個電觸點,其用於電接觸經封裝的 微晶片元件電連接; 内的縫隙,其中,該縫隙被分成至 中的至少第一開口從外側穿過内插
C:\2D-CODE\91-06\91107069.ptd 第11頁 567594 五、發明說明(8) 器延伸’允許連接到微晶片元件上_ 交佳地,遺縫隙被連接相對的縫隙邊# + 步較佳的是,具有多個縫= =接分割。 攸而形成在轉移模塑步驟中从隙排列成串, =提供沿通道位於兩個縫隙 仗外侧延伸到内插器之内。 "中,έ玄開口 根據本發明,還提供了 一種疏 括: 徑、、工封衣的微晶片元件,包 具有多個第一電觸點的微晶片元件; 内插器,該内插器具有多個第二 插器延伸的縫隙、以及從 ·^ =占、從外側穿過内 口;以及 I伸到内插器内的分隔開 電導體,該導體將第一電觸 點電連接, ”、、/、弟一電觸點中相應的觸 J:二插器黏接在微晶片元件上; 個在縫隙内延伸;以及 、,逢隙和为隔開口至少部分 少一個導體被固定到内插器上、 電絕緣材料,從而至 發明之具艚眚口口 在圖1到8中,相同的元 的部分和特徵。 、’扁號用於具有相同或相似功能 圖1示出貫穿具有矜曰 _ 元件1帶有内插器7和V封樹元二:的:”橫剖面’微晶片 2 7固定到微晶片元件!上。1曰。内插器7用一層黏結劑 。微晶片元件1的寬度大於内插器 m C:\2D-C0DE\91-06\91J07069.ptd 苐12頁 五 、發明說明(9) 7:寬度’從而微晶片元件1的、., 佈置的兩側突出。在微a 邊緣在微晶片元件/内插器 設置了晶片焊點3,在此%凡件1面對内插器7的表面上, 面。這些晶片焊點3用作 ^ ’内插器7沒有覆蓋該表 並電連接到内插器7上。 二,以允許微晶片元件1接觸 面(在内插器7 ”外側"丨〇上)上母個晶片焊點3,在内插器表 )。這些觸點位於圖1中内 具有至少一個電觸點(未示出 晶片焊點3和内插器表面益面向下的表面上。這意味著 晶片焊點3通過導線5電連 蜀點面向相同的方向。每個 外,每個觸點通過電連接(崎些觸點中的—個上。此 接觸球9電連接。這些電不出)與相同内插器表面上的 9用作電觸點,以允;經 插器7一的-部分。接觸球 i/t 44 、勺诚晶片元件1的電連接。導 、尿ΰ被饮封到樹脂25中,植 j电逆莜导 揾供,士、甘θ J月曰2 5可以通過任何適宜的方法 ΐ 過灌封、調配、印刷和/或轉移模塑。樹 =不^封導線5,而且密封微晶片元件i和内插器7的 曰峰從而在機械上穩定封裝,並從而覆蓋並電絕緣晶片 知點3以及内插器表面上靠近側部邊緣的觸點(未示出)。 根據圖1的封裝設計代表被稱作輸入端設計(f an — i η design)的一類CSP(晶片級封裝)。與圖2所示的佈置對應 的设計代表另一類c S P,被稱為輸出端設計(f a η - 0 u t des i gn)。輸入端設計與輸出端設計的不同在於微晶片元 件1和内插器7表面上要通過導線5或其他適宜裝置電連接 的觸點的佈置。在輸入端設計中,兩組觸點在靠近微晶片 元件1或内插器7側邊緣的表面區域上分佈。在輸出端設計
C:\2D-CODE\91-06\91107069.pid 第13頁 567594 五、發明說明(ίο) 1 " 中’這些觸點設置在内插器7或微晶片元件丨的位於橫别面 中心區域内的表面區域上。輪入端設計與輸出端設計的結 合是可能的。 圖3示出一種輸出端設計的變型,其中微晶片元件}的側 邊緣和背面(圊3中面朝上)由樹脂2 5覆蓋。因此,微晶 片元件1由樹脂25密封。這種結構導致非^穩定的封裝。 與此相反,與圖2設計對應的樹脂2 5不覆蓋微晶片元件1的 背面。此外,在圖2的實施例中,四周樹脂2 5的側邊緣與 内插器7的側邊緣對齊。 本發明不限於參照圖1到3所描述的設計。 圖4示出内插器7的透視圖,内插器7位於多個微晶片元 件1附近以允許這些微晶片元件1在一個程序中同時或並行 地封裝。與圖4對應的佈置包括至少9個要封裝的微晶片元 件1 ’如標有虚線的封裝輪廊8所示。該佈置右手側上的部 分已經被切除,以示出該佈置的剖面。 圖4佈置的内插器7為單一部分。這有利於内插器的加 工,並加快多個封裝的生產。然而,可以用由多個部分構 成的内插器取代。内插器7包括具有若干個縫隙區域的縫 隙1 1,其中每個縫隙區域對應一個微晶片元件1的封裝區 域。在每個封裝區域内具有一個細長的第一開口 1 5,該開 口橫剖面為細長矩形,該矩形具有倒圓的角部。第一開口 1 5從外側(圖4中的上側)通過内插器7延伸到對應微晶片 元件1的表面上。作為一個例子,對於所有微晶片元件1 ’ 以及對於這個特定微晶片元件1表面上的其他區域,在圖4
C:\2D-CDDH\91-06\91107069.ptd 第 14 頁 567594 五、發明說明(11) 的中心封裝的封裝區域的左手側上示出了八個晶片輝點 。内插器7位於微晶片元件表面上,從而允許從外 c 一開口 15觸及晶片焊點在將内插器 二 J曰曰“件!附近之後,言免置導線5或其他適 】 ,,並將其連接到晶片焊點3以及 電内 ' 土,從而將晶片焊點3中的每—個與一個内插器焊二6 :。=焊f 6位於内插器7的面向所述外側的表面4 ί哭Π” 點6電連接(連接裝置未示出)到内 插σ。表面上的母一個接觸球g上。 内 在圖4所示的實施例中,蝻险] 從而内插器焊點6所」:表= 臺階形, 域位於不同高度上。尤豆是—:接觸球9所處的表面區 從而縫隙1】可以被填充至接觸球^焊1高^低, 而,本發明不限於這個特定實、、區域的向度。然 他臺階形剖面是可以的,該臺階J面:f地,内插器的其 高度。也可以提供一種内插器,二使付具有不同的表岛 點或觸點位於與接觸球或苴 二,插器中,内插器埤 度上…嫩圖⑴以:,觸點 縫隙區域的不同的第二二中5:, :跨接18分隔。每個跨接以包::::7 隙11的一側延伸到相對的一側接條19,它們從縫 伸的相對的縫隙邊緣13。在每個接沿第-開口15延 間,具有第二開口丨6, 8的兩個連接條1 9之 通過内插器7延伸到微晶片元件丨白、也坆内插器7的外側 、表面向度處。在替換實 [ΛΙ C:\2D-CQDE\91-06\91107069.ptd 第15頁 567594 五、發明說明(12) t Ί:f苐二開口中的至少-個不延伸穿過内插哭, 門:1 6 :作二]延伸到内插器内。在這兩個實施例中,第、 開口 1 b用作穩定奘罟, *、 τ 弟一 動,該絕緣材料被傳遞H液體或炫融絕緣材料的流 二條19用作縫隙11的橫支柱。因此匕Η 口 1 5的尺寸和在縫隙丨丨相對弟開 變,並且便於加工内插器7。的接觸球9之間的距離D不 縫隙1 1形成用於將密封材料丘Α it K 4 ^ t ..J m ^ ^ -系列後續的縫隙區域構成。°一為·,.田長的’並且由 内插器/微晶j:; ; & & @ 中。圖5示出接^ # Q .、另一個實施例示於圖5和圖6 内插器7:Γ二二佈置的接觸表面的俯視圖。 置。該佈置鱼之山成,為兩個微晶片元件1的封裝而設 的兩個封裝在二 以,而所形成的微晶片元件1 開。縫隙u為細ΐί =f ”廓8將其分隔而分 (圖5中的Λ Λ延/申。縫隙11被位於縫隙11的開口端 部的連接條1、9 Λ 圖6中的前部和後部)之間的中 度伸向接觸球9田刀。連接條1 9不從微晶片元件1的表面高 示Μί::ΓΛ的内插器7外側的表面高度(如圖6所 一令声,_連接條19從微晶片70件1的表面高度伸向 差^分大約在内插器7外側上的表面高度的高ΐ 在㈣從縫。的!或密封材料 1 個開口立而七、、七4牙過連接條1 9。此 第16頁 C:\2D-CODE\9I-06\91107069.ptd 567594
567594 五、發明說明(14) 17,它 兩個微 所有 1的表面上。此外’内插器7總共包括三個分 們在供給方向上位於第一微晶片元件封裝的;崎口 晶片元件封裝之間、以及第二微晶片元件封^面: 的分隔開口 1 7都從内插器7的外側通過内插哭1 t後 開口 1 7穩定了從材料源2 2通過供應路經2 3供^ ^伸分隔 動。此外,内插器Y的加工和尺寸整濟μ 士’、、、、σ的材料的流 穩定,每個連接條1 9位於第一開口 1 5中的—An 条9 Π中的-個之間。 的-個與分隔開口 當來自材料源2 2的材料通過供應路經供6入n 士 1、而0可,材料.苴 到達第一前側空腔24並在其到達第一開口 ! R ^ ^ 於供應路徑23端部附近的分隔開口。因并,姑士 " ^ 1 ^此,填充材料部分 地填充這個分隔開口 17 ’並使其他填充材料能在第— 得到 15完全填滿之前到達周圍空腔2丨。因此,在轉移模塑^程 中’周圍空腔21可以被供給足夠的材料以在其橫向側穷封 微晶片元件1和内插器7。類似的效果通過兩個對齊的ς曰曰曰 片元件1之間的分隔開口 1 7實現。然而,應指出的是,;1這03 個特定的分隔開口 1 7的長度大於微晶片元件1之前和彳饮曰 片元件1之後的分隔開口 1 7的長度。通過調整分隔開t ^ 的長度,並且選擇性地或替換性地調整第一開口丨^的長 度,所有要被填充的空腔1 5、2 1、24、2 6的填充可以、 控制,以獲得滿意的填充效果。 元件編號之說明 1 微晶片元件 3 電觸點
567594 五、發明說明(15) 5 密封導線 6 内插器焊點 7 内插器 9 接觸球 11 縫隙 13 縫隙邊緣 15 第一開口 16 第二開口 17 分隔開口 18 跨接 19 連接條 21 周圍空腔 22 材料源 23 供應路徑 24 前側空腔 2 5 樹脂 26 後側空腔 27 黏結劑
\\312\2d-code\91-06\91107069.ptd 第19頁 567594 圖式簡單說明 將僅借助非限定性實例,並請參照所附的示意圖,描述 本發明,其中: 圖1 、圖2及圖3示出橫貫不同的經封裝的微晶片元件的 橫剖面; 圖4示出定位在多個微晶片元件上的内插器的一部分的 透視圖; 圖5示出佈置在兩個微晶片元件附近的内插器接觸表面 上的視圖, 圖6示出沿線V I - V I穿過圖5的佈置的橫剖面; 圖7示意性示出用於通過轉移模塑形成微晶片封裝的密 封材料的佈置;以及 圖8是圖7中的佈置的一部分的橫剖面圖。 Μ 1
II 118 C:\2D-CODE\91-06\91I07069.ptd 第20頁

Claims (1)

  1. 567594 六、申請專利範圍 内插器(7 )内。 1 1. 一種經封裝的微晶片元件,包括: 具有多個第一電觸點(3 )的微晶片元件(1 ); 内插器(7 ),該内插器具有多個第二電觸點(9 )、從外側 穿過内插器(7)延伸的縫隙(11 )、以及從外側延伸到内插 器(7 )内的分隔開口( 1 6、1 7 );以及 電導體(5 ),該導體將第一電觸點(3 )與第二電觸點(9 ) 中相應的觸點電連接, 其中,内插器(7 )黏接在微晶片元件(1 )上; 導體(5 )中的至少一個在縫隙(1 1 )内延伸;以及 縫隙(1 1 )和分隔開口( 1 6、1 7)至少局部地填充有電絕緣 材料(2 5 ),從而至少一個導體(5 )固定到内插器(7 )上。
    C:\2D-CODE\91-06\91107069.ptd 第23頁
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