^44179 九、發明說明: 【發明所屬之技術領域】 本發明係有關一種玱晶 的堆疊封裝結構。 $ $裝、,吉構,特別是一種具有屏蔽 【先前技術】 隨著電子難技_進步,麵愈多的電子元件被設計於一封裝 2叫到元件體積縮小化的目的。因此,若干元件以堆疊的方式 排列於封裝結射是解決體積辭段之—。 然而’對於高頻元件,例如軌元件而言,彼此之間會有干 擾的問題,因此於安排高頻元件喷_屏蔽設計來避免元件之間的 干擾。屏蔽設計-般最簡單的方式係期麵賊效應來達到阻絕電 磁干擾的問題。但是’對於目前的封裝製作來看,無法利用金屬屏蔽 效應來設計屏蔽伽,因此目前高頻元件_裝並不_堆叠的方袭 形式。 基於封裝結構縮小化與降低成本的寺量,堆叠的封裝結構仍_ 頻元件封裝必須發制方向之—。因此,如何讀低的成本將屏2 用設計於堆疊封裝結射是現今堆4縣技術努力的方向之— 1244179 【發明内容】 欲避免元件之間的干擾問題,於此 其形成方法,利用導電膠與連接導 有鑑於上述背景中, 提供一種堆疊封裝結構與 線介於堆疊元件之間。 封裝體積與成本,於itl ^種堆㈣裝結構與其形成方法,利科«與低以 缚形空白晶片可以提供導通與降低封裝體積的特點。 根據上述之目的,本發明之—實施例,提供一種堆疊全 裝結構與方法’提供-基板,其至少有—地線術。undlayel 於其中。兩半導體元件,其—被黏著固定於基板上,兩者之 間則存在-屏蔽結構(shielding咖伽代)並且與基板的地 線層有電性上的連I其中屏蔽結構至少由導電膠與導電錄 所組成。 【實施方式】 本發明之實施例用示意圖詳細描述如下,在詳述本發明之實施例 時,表示晶圓表面的部份會放大顯示並說明,然不應以此作為有限定 的認知。此外,在實際的晶圓表面與方法_,可以包含此結構令其他 必要的部分。 其次,當本發明之實施例圖式中的各元件或結構以單一元件或 1244179 結構描述制時’他x此作騎限定的認知,.下之說明未特別 強調數目上的限料’本發明之精神與細範财推及多數 結構並存的結構與方法上。 或 第-圖為本發明的-實施例所應用之―封裳元件的立體示意圖。 於本實施例中,高頻IC(圖上未示),例如低功耗無線電收發器的特殊 應用 IC(Application Specific Integrated Circuit ; ASIC),以四邊扁平無 接腳(Quad Flat No Lead,QFN)封裝方式封裝成為一半導體元件5,其 具有若干周圍末端接墊分布於半導體元件5 的四周邊緣與一暴露出的晶粒接塾16(exp〇sed die pad)位於半導體元件 5之表面中央範圍。然本發明之實施例並不限於此種封裝元件,其他 的封裝形式,例如岸面柵格陣列(Land LGA)元件或晶粒 (die),亦可應用於本發明之精神。 第一 A至第二E圖為根據本發明之一實施例之堆疊封裝結構的剖 面示意圖。參照第二A圖,一基板10之表面10a上分布若干導電接 墊12與一黏著層14,半導體元件5固定於黏著層14上。再者,一導 電結構20連接每一周圍末端接墊18與鄰近的一導電接墊12。於一實 施例中’基板10為一具有線路層或電源層(p0wer layei·)與地線層(获〇1111(1 layer)的一多層板(圖上未示)。導電接塾12,例如銅接墊或金接塾,以 適當的方法,例如電鍍的方式,形成於基板10之外層上。其中至少 一導電接墊12連接至基板1〇中的地線層。黏著層14,例如一絕緣環 1244179 氣黏著層,用轉半導體元件5固定於表面10a上。導電結構2〇,例 如以打線方式形成的金線,負t半導體元件5與基板ig之間的電性 連接。 參照第二B圖,依序放置一導電膠22(c〇nductive叫叫與一薄 型晶片24(mirror chip)於半導體元件5之晶粒接墊i6上。於一實 施例中’導電膠22,例如-導電銀膠,包含顆粒細小的導電粒子, 例如銀/銀飽合金分布於其中,具有導電與黏著的功用。 薄型晶片24, 例如-空白無線路或元件的晶片,可以—般方式薄形化至⑽微米厚 度’具有承載的功能。本發明之精神,利用導電膠22與薄型晶片料 取代-般的金屬# ’形錢續的賤結構,_達到堆疊結構薄型化 的優點。 參照第二c圖,另-導電結構26通過薄型晶片24之上方,兩 端與表面IGa上之兩接轉i2a ;}:目連接。於—實施例中,導電結構 26 ’例如一金線’利用打線的方式固定於接地墊12&上,接地墊12& 係與基板10中的地線層(圖上未示)有電性上的連接。 參照第二D圖,另一導電膠28形成於薄型晶片24上且將導電 結構26 E]定於導電膠28巾,並且另一半導體元件3〇固定於導電膠 28上。於-實施例中’導電膠28與導電膠22的功能相同,具有導 電與黏著的功能,因此導電膠28的材料可與導電膠22相同或類似。 1244179 僅連接一接地墊12a,導電結構26之另一端則埋入導電膠28中, 如此仍可達到金屬屏蔽的效應。可以理解的,導電結構26亦可固定 於導電膠22中。 根據上述,本發明之一實施例提供一種具有屏蔽結構的堆疊 封裝結構與其製作方法。提供一基板,其上具有至少一接地 墊。一第一半導體元件固定於基板上,一第二半導體元件則 位於第一半導體元件上。一導電膠結構固定並黏著於第一半 導體7L件與第二半導體元件之間。一第一導電結構固定於導 電膠結構中並且與接地墊有電性上的連接。一空白晶片固定 於導電膠結構中並且位於第一半導體元件與第二半導體元件 之間。 以上所述之實施例僅係為說明本發明之技術思想及特點,其目的 在使熟習此項技藝之人士能夠瞭解本發明之内容並據以實施,當不能 、之限疋本發明之專利範圍,即大凡依本發明所揭示之精神所作之均 等變化或修飾,仍應涵蓋在本發明之專利範圍内。 【圖式簡單說明】 第圖為本發明的-實施例所應用之一封裝元件的立體示意圖。 第-A至第二E_根據本發明之—實補之堆疊封裝結構的剖面八 意圖。 〇不 1244179 第三圖為本發明之另一實施例,說明另一屏蔽結構的剖面示意圖。 【主要元件符號說明】 5 半導體元件 10 基板 10a,b 表面 12 導電接墊 12a接地墊 14 黏著層 16 晶粒接塾 18 周圍末端接墊 20 導電結構 22 導電膠 24 薄型晶片 26 導電結構 28 導電膠 30 半導體元件 32 導電接墊 34 導電結構 36 封膠結構 38 導電球 12^ 44179 IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to a stacked package structure of crystal. $ $ Package, Gigabyte, especially one with shielding [Previous technology] With the advancement of electronic technology, more and more electronic components are designed in a package 2 to reduce the volume of components. Therefore, arranging several components in the package in a stacked manner is one of the solution volume phrases. However, for high-frequency components, such as rail components, there is a problem of interference with each other. Therefore, a high-frequency component spray-shield design is arranged to avoid interference between components. Shield design-the simplest way is to prevent the electromagnetic interference by using the surface thief effect. However, for the current package production, the shielding effect cannot be designed by using the metal shielding effect. Therefore, the current high-frequency components are not mounted in a stacked form. Based on the shrinking of the packaging structure and the reduction of cost, the stacked packaging structure is still in the direction of frequency component packaging. Therefore, how to read the low cost to use the screen 2 in a stacked package design is the direction of the current four-county technical efforts — 1244179 [Summary of the Invention] To avoid the problem of interference between components, the formation method here uses conductive In view of the above background, a glue and a connection guide provide a stacked package structure and a wire interposed between the stacked elements. Packaging volume and cost, in terms of itl stack mounting structure and its forming method, Ricoh «and low-blank blank chip can provide the characteristics of conduction and reduce packaging volume. According to the above-mentioned object, an embodiment of the present invention provides a stacked full structure and method'providing-substrate, which at least has -grounding. undlayel in it. Two semiconductor components, which are adhered and fixed on the substrate, are in between-a shielding structure (shielding) and are electrically connected to the ground layer of the substrate. The shielding structure is at least made of conductive adhesive and Composed of conductive records. [Embodiment] The embodiment of the present invention is described in detail with a schematic diagram as follows. When the embodiment of the present invention is described in detail, the part showing the surface of the wafer will be enlarged and explained, but it should not be used as a limited recognition. In addition, the actual wafer surface and method can include other necessary parts of this structure. Secondly, when each element or structure in the embodiment of the present invention is described by a single element or a 1244179 structure description, 'he x this is a limited cognition, the following description does not particularly emphasize the number of material restrictions' The spirit and fine Fancai push on the structure and method that coexist with most structures. Or Figure-is a schematic perspective view of a Fengshang element applied to an embodiment of the present invention. In this embodiment, a high-frequency IC (not shown in the figure), such as an Application Specific Integrated Circuit (ASIC) for a low-power radio transceiver, has a quad flat no lead (QFN). The package is packaged into a semiconductor device 5, which has a plurality of peripheral end pads distributed on the peripheral edges of the semiconductor device 5 and an exposed die pad 16 located at the center of the surface of the semiconductor device 5. However, the embodiment of the present invention is not limited to such a packaged component, and other packaging forms, such as a land grid array (Land LGA) element or a die, can also be applied to the spirit of the present invention. The first A to the second E are schematic cross-sectional views of a stacked package structure according to an embodiment of the present invention. Referring to FIG. 2A, a plurality of conductive pads 12 and an adhesive layer 14 are distributed on the surface 10a of a substrate 10, and the semiconductor element 5 is fixed on the adhesive layer 14. Furthermore, a conductive structure 20 connects each peripheral end pad 18 to an adjacent conductive pad 12. In one embodiment, the 'substrate 10 is a multilayer board (not shown in the figure) with a circuit layer or a power layer (p0wer layei) and a ground layer (not shown). The conductive connection 12, For example, copper pads or gold pads are formed on the outer layer of the substrate 10 by a suitable method, such as electroplating. At least one conductive pad 12 is connected to the ground layer in the substrate 10. The adhesive layer 14, such as An insulating ring 1244179 is a gas-adhesive layer, and is fixed on the surface 10a by the semiconductor element 5. The conductive structure 20, for example, a gold wire formed by wire bonding, is electrically connected between the semiconductor element 5 and the substrate ig. In Figure 2B, a conductive adhesive 22 (conductor called and a thin chip 24 (mirror chip) is placed on the die pad i6 of the semiconductor element 5. In one embodiment, the conductive adhesive 22, for example- Conductive silver glue contains small conductive particles, such as silver / silver-saturated alloys, which have the function of conductivity and adhesion. Thin wafers 24, such as wafers for blank wireless circuits or components, can be thinned to ⑽Micron thickness' has the function of carrying. This In the spirit of the invention, the conductive glue 22 and the thin wafer material are used instead of the metal-like base structure to achieve the advantages of thinning the stacked structure. Referring to the second figure c, the conductive structure 26 passes the thin wafer 24 Above, the two ends are connected to the two on the surface IGa, i2a;}: mesh connection. In the embodiment, the conductive structure 26, such as a gold wire, is fixed to the ground pad 12 & It is electrically connected to the ground layer (not shown) in the substrate 10. Referring to the second diagram D, another conductive adhesive 28 is formed on the thin wafer 24 and the conductive structure 26 E] is determined to be conductive. Adhesive 28, and another semiconductor element 30 is fixed on the conductive adhesive 28. In the embodiment, 'the conductive adhesive 28 has the same function as the conductive adhesive 22, and has the function of conducting and adhering, so the material of the conductive adhesive 28 can be combined with The conductive adhesive 22 is the same or similar. 1244179 is only connected to a ground pad 12a, and the other end of the conductive structure 26 is buried in the conductive adhesive 28, so that the effect of metal shielding can still be achieved. It can be understood that the conductive structure 26 can also be fixed to the conductive胶 22。 According to the above An embodiment of the present invention provides a stacked package structure with a shielding structure and a manufacturing method thereof. A substrate is provided with at least one ground pad thereon. A first semiconductor element is fixed on the substrate, and a second semiconductor element is located on the first On the semiconductor element, a conductive adhesive structure is fixed and adhered between the first semiconductor 7L and the second semiconductor element. A first conductive structure is fixed in the conductive adhesive structure and is electrically connected to the ground pad. A blank chip It is fixed in the conductive adhesive structure and located between the first semiconductor element and the second semiconductor element. The embodiments described above are only for explaining the technical idea and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand The content of the present invention is also implemented according to it. When it is impossible, the scope of the patent of the present invention, that is, all equal changes or modifications made according to the spirit disclosed by the present invention, should still be covered by the patent scope of the present invention. [Brief description of the drawings] FIG. 1 is a schematic perspective view of a package component applied to an embodiment of the present invention. Sections -A to E_ According to the present invention-the cross-section of the stacked package structure according to the present invention. 〇 不 1244179 The third figure is another schematic view of another embodiment of the present invention, illustrating a schematic cross-sectional view of another shielding structure. [Symbol description of main components] 5 Semiconductor element 10 Substrate 10a, b Surface 12 Conductive pad 12a Ground pad 14 Adhesive layer 16 Die pad 18 Surrounding pad 20 Conductive structure 22 Conductive glue 24 Thin wafer 26 Conductive structure 28 Conductive glue 30 Semiconductor element 32 Conductive pad 34 Conductive structure 36 Seal structure 38 Conductive ball 12