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JP2005109306A - Electronic component package and manufacturing method thereof - Google Patents

Electronic component package and manufacturing method thereof Download PDF

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Publication number
JP2005109306A
JP2005109306A JP2003342995A JP2003342995A JP2005109306A JP 2005109306 A JP2005109306 A JP 2005109306A JP 2003342995 A JP2003342995 A JP 2003342995A JP 2003342995 A JP2003342995 A JP 2003342995A JP 2005109306 A JP2005109306 A JP 2005109306A
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Prior art keywords
layer
electronic component
plating
component package
sealing body
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Inventor
喜久 ▲高▼瀬
Yoshihisa Takase
Shigeki Yamada
茂樹 山田
Masaaki Hayama
雅昭 葉山
Masaaki Katsumata
雅昭 勝又
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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    • H10W42/20
    • H10W42/276
    • H10W72/0198

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  • Chemically Coating (AREA)
  • Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

【課題】電子部品パッケージのシールド性向上に対応し、電子機器の小型化、低背化、軽量化、高周波化に十分なシールド効果を実現する電子部品パッケージとその製造方法を提供することを目的とするものである。
【解決手段】グランドパターン3を有する回路基板1と、この回路基板1の上面に実装した電子部品からなる実装部品5と、この実装部品5を封止する無機質フィラーを含有するエポキシ樹脂からなる封止体6と、この封止体6の表面に形成される第1層7としての無電解銅めっき層と、第2層8としての電解銅めっき層と、第3層9としての銅の酸化を防止する皮膜層からなるシールド層からなり、このシールド層を前記グランドパターン3に接地した。
【選択図】図2
An object of the present invention is to provide an electronic component package and a method of manufacturing the electronic component package that realizes a shielding effect sufficient to reduce the size, height, weight, and frequency of an electronic device in response to an improvement in shielding performance of the electronic component package. It is what.
A circuit board having a ground pattern, a mounting part made of an electronic component mounted on the upper surface of the circuit board, and an epoxy resin containing an inorganic filler for sealing the mounting part. Stop body 6, electroless copper plating layer as first layer 7 formed on the surface of sealing body 6, electrolytic copper plating layer as second layer 8, and oxidation of copper as third layer 9 The shield layer was made of a coating layer that prevents the film from being grounded, and the shield layer was grounded to the ground pattern 3.
[Selection] Figure 2

Description

本発明は、各種電子機器、通信機器等に用いられる電子部品パッケージおよびその製造方法に関するものである。   The present invention relates to an electronic component package used in various electronic devices, communication devices, and the like, and a manufacturing method thereof.

従来、この種の電子部品パッケージは、図5に示されるような構成を有していた。   Conventionally, this type of electronic component package has a configuration as shown in FIG.

図5は従来の電子部品パッケージの斜視図である。   FIG. 5 is a perspective view of a conventional electronic component package.

図5において、回路基板20の上面にグランドパターンと導通する接地用電極パターン21を形成し、前記回路基板20に実装部品22を実装し、これらの実装部品22をエポキシ樹脂による封止体23で封止し、前記封止体23の表面にニッケルめっき層24を接地用電極パターン21と導通させるように形成して電子部品パッケージの電磁波シールドを行っていた。   In FIG. 5, a ground electrode pattern 21 that is electrically connected to the ground pattern is formed on the upper surface of the circuit board 20, mounting components 22 are mounted on the circuit board 20, and these mounting components 22 are sealed with an epoxy resin sealing body 23. Sealing was performed, and the nickel plating layer 24 was formed on the surface of the sealing body 23 so as to be electrically connected to the grounding electrode pattern 21 to shield the electromagnetic wave of the electronic component package.

なお、この出願の発明に関する先行技術文献情報としては、例えば、特許文献1が知られている。
特開平11−163583号公報
As prior art document information relating to the invention of this application, for example, Patent Document 1 is known.
Japanese Patent Laid-Open No. 11-163583

しかしながら、近年、電子部品パッケージが小型化、低背化、軽量化、高周波化する中で、従来の電子部品パッケージに採用されているニッケルめっき皮膜では電磁波を十分にシールドしていくことが困難となってきている。そこで、ニッケルめっき皮膜の厚さを厚くすることでシールド性を向上させることで対応しているが、ニッケルめっき皮膜を厚くすることで多くの不具合が発生している。例えば、ニッケルめっき厚が3μm以上になると加熱時にクラックが発生する。あるいは封止樹脂とニッケルめっき皮膜の膨張係数が大きく違うため電子部品パッケージをマザーの回路基板にはんだ接合するのに、リフロー炉を通すとニッケル皮膜が封止樹脂から浮く、膨れるなどの不具合が発生する。   However, in recent years, as electronic component packages have become smaller, lower, lighter, and higher in frequency, it is difficult to sufficiently shield electromagnetic waves with the nickel plating film employed in conventional electronic component packages. It has become to. Therefore, this is dealt with by improving the shielding performance by increasing the thickness of the nickel plating film, but many problems are caused by increasing the thickness of the nickel plating film. For example, when the nickel plating thickness is 3 μm or more, cracks occur during heating. Or, the expansion coefficient of the sealing resin and the nickel plating film are greatly different, and when soldering the electronic component package to the mother circuit board, the nickel film floats from the sealing resin and swells when passed through a reflow oven. To do.

また、シールド性については、シールド皮膜の導電性が大きく関係することがわかっており、ニッケルめっき皮膜の中でも電解ニッケルめっき皮膜の方が無電解ニッケルめっき皮膜より10倍ほど小さい。   In addition, regarding the shielding property, it is known that the conductivity of the shielding film is greatly related, and among the nickel plating films, the electrolytic nickel plating film is about 10 times smaller than the electroless nickel plating film.

そこで、電解ニッケルめっきでシールド性を向上させようとすると、電解ニッケル皮膜は塩水噴霧試験を行うとシールド効果が著しく低下する。   Therefore, when an attempt is made to improve the shielding performance by electrolytic nickel plating, the shielding effect of the electrolytic nickel film is significantly reduced when a salt spray test is performed.

一方、無電解めっき皮膜は、めっき液中の還元剤に含まれるリンをめっき皮膜中に取り込むため数%のリンを含むNi−P皮膜である。従って、リン含有率が6%以上の中リン、高リンタイプの無電解ニッケルめっき皮膜を用いると耐食性に著しく優れた皮膜になるが、リン含有率が増えるに従い皮膜の導電性は悪くなり、さらに硬度も高いため、膜厚を厚くしてシールド性を向上させようとすると、先に延べたように加熱時のクラック、膨れ、剥離などの不具合が発生し電子部品パッケージのシールド皮膜として使用するには限界があり、シールド性を向上させるという要望に対応できないという問題点を有していた。   On the other hand, the electroless plating film is a Ni-P film containing several percent of phosphorus because phosphorus contained in the reducing agent in the plating solution is taken into the plating film. Therefore, if a medium phosphorus or high phosphorus type electroless nickel plating film having a phosphorus content of 6% or more is used, the film becomes extremely excellent in corrosion resistance. However, as the phosphorus content increases, the conductivity of the film deteriorates. Because the hardness is high, if you try to improve the shielding performance by increasing the film thickness, problems such as cracking, swelling, and peeling during heating will occur as previously described, and it will be used as a shielding film for electronic component packages. Has a problem that it cannot meet the demand for improving the shielding performance.

本発明は上記従来の課題を解決するもので、電子部品パッケージのシールド性向上に対応し、電子機器の小型化、低背化、軽量化、高周波化に十分なシールド効果を実現する電子部品パッケージとその製造方法を提供することを目的とするものである。   SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and responds to the improvement of the shielding performance of an electronic component package, and realizes a sufficient shielding effect for reducing the size, height, weight, and frequency of electronic devices. And a method for manufacturing the same.

上記目的を達成するために、本発明は以下の構成およびプロセスを有する。   In order to achieve the above object, the present invention has the following configuration and process.

本発明の請求項1に記載の発明は、グランドパターンを有する回路基板と、この回路基板の上面に実装された電子部品からなる実装部品と、この実装部品を封止する無機質フィラーを含有するエポキシ樹脂からなる封止体と、この封止体の表面に形成した第1層としての無電解銅めっき層と、第2層としての電解銅めっき層と、第3層としての銅の酸化を防止する皮膜層からなるシールド層とからなり、このシールド層を前記グランドパターンに接地した電子部品パッケージであり、これにより、小型、低背、軽量で電磁波シールド性に優れた電子部品パッケージを構成できるという作用効果が得られる。   The invention according to claim 1 of the present invention is an epoxy containing a circuit board having a ground pattern, a mounting part composed of an electronic component mounted on the upper surface of the circuit board, and an inorganic filler for sealing the mounting part. Sealing body made of resin, electroless copper plating layer as the first layer formed on the surface of the sealing body, electrolytic copper plating layer as the second layer, and oxidation of copper as the third layer are prevented An electronic component package having a shielding layer made of a coating layer and grounding the shield layer to the ground pattern, whereby an electronic component package having a small size, a low profile, a light weight, and excellent electromagnetic shielding properties can be configured. The effect is obtained.

本発明の請求項2に記載の発明は、皮膜層が錫めっき層からなる請求項1に記載の電子部品パッケージであり、これにより、実装時にはんだリフロー炉を通ることにより錫めっき層が溶融し、めっき皮膜が緻密な層になり、薄いめっき厚でも耐湿性等環境特性に優れた皮膜を形成することができ、第2層の電解銅めっき層の酸化等を防ぐことができるという作用効果が得られる。   The invention according to claim 2 of the present invention is the electronic component package according to claim 1 in which the coating layer is formed of a tin plating layer, whereby the tin plating layer is melted by passing through a solder reflow furnace during mounting. The plating film becomes a dense layer, and a film having excellent environmental characteristics such as moisture resistance can be formed even with a thin plating thickness, and the effect of preventing oxidation of the electrolytic copper plating layer of the second layer can be achieved. can get.

本発明の請求項3に記載の発明は、皮膜層がニッケル、ニッケル−硼素またはニッケル−リンめっき層からなる請求項1に記載の電子部品パッケージであり、これにより、無電解めっき皮膜が硼素またはリンを含むことで耐湿試験等環境特性に優れた皮膜を形成し第2層の電解銅めっき層の酸化等を防ぐことができるという作用効果が得られる。   The invention according to claim 3 of the present invention is the electronic component package according to claim 1, wherein the coating layer is made of nickel, nickel-boron or nickel-phosphorous plating layer, whereby the electroless plating coating is boron or By containing phosphorus, a film having excellent environmental characteristics such as a moisture resistance test can be formed, and the effect of being able to prevent oxidation or the like of the electrolytic copper plating layer of the second layer can be obtained.

本発明の請求項4に記載の発明は、グランドパターンを有する回路基板の上面に電子部品からなる実装部品を実装し、この実装部品を無機質フィラーを含有するエポキシ樹脂からなる封止体で封止し、この封止体の表面に無電解銅めっきで第1層を形成する工程と、電解銅めっきで第2層を形成する工程と、銅の酸化を防止する皮膜で第3層を形成する工程によりシールド層を形成し、このシールド層をグランドパターンに接地する電子部品パッケージの製造方法であり、これにより、電磁波シールド性に優れた電子部品パッケージを製造できるという作用効果が得られる。   According to a fourth aspect of the present invention, a mounting component made of an electronic component is mounted on the upper surface of a circuit board having a ground pattern, and the mounting component is sealed with a sealing body made of an epoxy resin containing an inorganic filler. Then, a step of forming the first layer by electroless copper plating on the surface of the sealing body, a step of forming the second layer by electrolytic copper plating, and a third layer by a film that prevents oxidation of copper are formed. This is a method for manufacturing an electronic component package in which a shield layer is formed by a process, and this shield layer is grounded to a ground pattern. This provides an effect that an electronic component package having excellent electromagnetic wave shielding properties can be manufactured.

本発明の請求項5に記載の発明は、グランドパターンを有する回路基板の上面に電子部品からなる実装部品を実装し、この実装部品を無機質フィラーを含有するエポキシ樹脂からなる封止体で封止し、この封止体の上からグランドパターンが露出するように前記回路基板の一部を切削してスリット部を形成し、上記封止体の表面および切削面に無電解銅めっきで第1層を形成する工程と、電解銅めっきで第2層を形成する工程と、銅の酸化を防止する皮膜で第3層を形成する工程によりシールド層を形成し、このシールド層をグランドパターンに接地する電子部品パッケージの製造方法であり、これにより、電磁波シールド性に優れた電子部品パッケージを提供できるという作用効果が得られる。   According to a fifth aspect of the present invention, a mounting component made of an electronic component is mounted on the upper surface of a circuit board having a ground pattern, and the mounting component is sealed with a sealing body made of an epoxy resin containing an inorganic filler. Then, a part of the circuit board is cut so that the ground pattern is exposed from above the sealing body to form a slit, and the first layer is formed by electroless copper plating on the surface and the cutting surface of the sealing body. Forming a shield layer by a step of forming a second layer by electrolytic copper plating, and a step of forming a third layer by a film preventing copper oxidation, and grounding the shield layer to a ground pattern This is a method of manufacturing an electronic component package, and this provides an effect of providing an electronic component package having excellent electromagnetic wave shielding properties.

本発明の請求項6に記載の発明は、100℃以上の熱処理工程を無電解銅めっきで第1層を形成する工程と、電解銅めっきで第2層を形成する工程と、銅の酸化を防止する皮膜で第3層を形成する工程の少なくともいずれか1つの工程の後に設けた請求項4または請求項5に記載の電子部品パッケージの製造方法であり、これにより、めっき皮膜中の水分が除去され封止体とめっき皮膜の密着性がより強固になると共にめっき皮膜粒子が粒径が再結晶することによりめっき皮膜の導通性が安定化するという作用効果が得られる。   The invention according to claim 6 of the present invention includes a step of forming a first layer by electroless copper plating at a heat treatment step of 100 ° C. or higher, a step of forming a second layer by electrolytic copper plating, and oxidation of copper. 6. The method of manufacturing an electronic component package according to claim 4 or 5, which is provided after at least one of the steps of forming the third layer with a film to be prevented, whereby moisture in the plating film is reduced. As a result of the removal, the adhesion between the sealing body and the plating film is further strengthened, and the plating film particles are recrystallized in particle diameter, whereby the conductivity of the plating film is stabilized.

本発明の請求項7に記載の発明は、20μm以下の表面粗さを有する封止体に無電解銅めっき皮膜を形成する請求項4または請求項5に記載の電子部品パッケージのシールドめっき皮膜形成方法であり、これにより、20μm以上の表面粗さでは、封止体へのめっき皮膜の楔効果が得られなかったが20μm以下であれば、その効果が顕著に得られめっき皮膜をクロスカットしたテープ試験で剥がれの無い密着強度が得られることが確認でき封止体に密着性の優れたシールドめっき皮膜を形成することができるという作用効果が得られる。   The invention according to claim 7 of the present invention is the formation of a shield plating film for an electronic component package according to claim 4 or 5, wherein an electroless copper plating film is formed on a sealing body having a surface roughness of 20 μm or less. In this method, the wedge effect of the plating film on the sealing body could not be obtained with a surface roughness of 20 μm or more, but if the surface roughness was 20 μm or less, the effect was remarkably obtained and the plating film was cross-cut. It can be confirmed that an adhesion strength without peeling can be obtained by a tape test, and an effect that a shield plating film having excellent adhesion can be formed on the sealing body is obtained.

本発明の請求項8に記載の発明は、特に、第2層が電解銅めっき、第3層が電解錫めっきの皮膜形成工程でめっき液を一定の周波数で振動させる周波数15〜60Hz以下の超振動攪拌する請求項5に記載の電子部品パッケージの製造方法であり、これにより、超振動攪拌によりめっき液の移動がより加速され、めっき析出速度があがり(電流効率が良化される)、また、スリット部への液循環が良くなり、スリット部へのめっき付きまわり性が向上し電子部品パッケージの表面へのめっき付きまわりに優れたシールドめっき皮膜を形成できるという作用効果が得られる。   In the invention according to claim 8 of the present invention, in particular, the second layer is electrolytic copper plating, and the third layer is an electrolytic tin plating film forming step. 6. The method of manufacturing an electronic component package according to claim 5, wherein the vibration stirring is performed, whereby the movement of the plating solution is further accelerated by super vibration stirring, the plating deposition rate is increased (current efficiency is improved), and The liquid circulation to the slit part is improved, and the plating effect on the slit part is improved, so that an excellent shield plating film can be formed around the plating part on the surface of the electronic component package.

本発明の請求項9に記載の発明は、特に、第3層が無電解ニッケル−リンめっき皮膜形成工程で、ニッケルめっき皮膜中に6%以上のリンを含有させる請求項5に記載の電子部品パッケージの製造方法であり、これにより、耐環境性に優れた電子部品パッケージのめっき皮膜を形成できるという作用効果が得られる。   The invention according to claim 9 of the present invention is particularly the electronic component according to claim 5, wherein the third layer is an electroless nickel-phosphorus plating film forming step, and the nickel plating film contains 6% or more of phosphorus. This is a method for manufacturing a package, and this provides an effect that a plating film of an electronic component package having excellent environmental resistance can be formed.

本発明の請求項10に記載の発明は、無電解銅めっき工程の前処理工程として、樹脂封止された電子部品を熱処理する工程と、封止体の表面の樹脂を粗化するエッチング工程と、封止体の表面の無機質フィラーを粗化するエッチング工程と、銅めっきを析出させるためのパラジウム付与工程と、銅を析出させる無電解銅めっき工程とを有する請求項4または請求項5に記載の電子部品パッケージの製造方法であり、これにより、めっき皮膜が密着性に優れた電子部品パッケージおよびそのシールドめっき皮膜を形成できるという作用効果が得られる。   The invention according to claim 10 of the present invention includes a step of heat-treating a resin-encapsulated electronic component as a pretreatment step of an electroless copper plating step, and an etching step of roughening the resin on the surface of the encapsulant. The etching process which roughens the inorganic filler of the surface of a sealing body, the palladium provision process for depositing copper plating, and the electroless copper plating process which deposits copper are described in Claim 4 or Claim 5. The electronic component package manufacturing method according to the present invention provides an effect that the plating film can form an electronic component package having excellent adhesion and its shield plating film.

本発明の請求項11に記載の発明は、特に、樹脂封止された電子部品を熱処理する工程が封止体のガラス転移点(Tg)以上の熱処理である請求項10に記載の電子部品パッケージの製造方法であり、これにより、シールドめっき皮膜を形成した後、シールドめっき皮膜の密着強度試験で脆い樹脂層から剥がれるという現象を解決することができ、めっき密着性に優れた電子部品パッケージおよびそのシールドめっき皮膜を形成できるという作用効果が得られる。   The eleventh aspect of the present invention is the electronic component package according to the tenth aspect of the present invention, in particular, the step of heat treating the resin-sealed electronic component is a heat treatment at or above the glass transition point (Tg) of the encapsulant. As a result, it is possible to solve the phenomenon of peeling from a brittle resin layer in the adhesion strength test of the shield plating film after forming the shield plating film, and an electronic component package having excellent plating adhesion and its The effect that a shield plating film can be formed is obtained.

本発明の請求項12に記載の発明は、特に、封止体の表面の無機質フィラーを粗化するエッチング液がふっ化水素酸である請求項10に記載の電子部品パッケージの製造方法であり、これにより、スリット部に露出した回路基板の銅パターンを侵すことなく、封止体の表面を適度に粗化することができ、密着性に優れた電子部品パッケージおよびそのシールドめっき皮膜を形成できるという作用効果が得られる。   Invention of Claim 12 of this invention is a manufacturing method of the electronic component package of Claim 10 whose etching liquid which roughens especially the inorganic filler of the surface of a sealing body is hydrofluoric acid, Thereby, the surface of the sealing body can be appropriately roughened without damaging the copper pattern of the circuit board exposed in the slit portion, and an electronic component package having excellent adhesion and its shield plating film can be formed. The effect is obtained.

本発明のグランドパターンを有する回路基板と、この回路基板の上面に実装された電子部品からなる実装部品と、この実装部品を封止する無機質フィラーを含有するエポキシ樹脂からなる封止体と、この封止体の表面に形成した第1層としての無電解銅めっき層と、第2層としての電解銅めっき層と、第3層としての銅の酸化を防止する皮膜層からなるシールド層とからなり、このシールド層を前記グランドパターンに接地した電子部品パッケージであり電磁波シールド性に優れた電子部品パッケージを形成できるとともに密着性に優れたシールドめっき皮膜を形成することができるという効果を奏するものである。   A circuit board having the ground pattern of the present invention, a mounting part made of an electronic component mounted on the upper surface of the circuit board, a sealing body made of an epoxy resin containing an inorganic filler for sealing the mounting part, and From the electroless copper plating layer as the first layer formed on the surface of the sealing body, the electrolytic copper plating layer as the second layer, and the shield layer made of a coating layer that prevents oxidation of copper as the third layer It is an electronic component package in which this shield layer is grounded to the ground pattern, and an electronic component package excellent in electromagnetic wave shielding properties can be formed and a shield plating film excellent in adhesion can be formed. is there.

(実施の形態1)
以下、実施の形態1を用いて本発明の特に請求項1〜3に記載の発明について説明する。
(Embodiment 1)
The invention according to the first to third aspects of the present invention will be described below with reference to the first embodiment.

本発明の実施の形態1における電子部品パッケージは図1の斜視図で示すように多層基板で形成した回路基板1の上に電磁波シールド層2を形成している。図2は図1のA−Aで示した電子部品パッケージの断面図を示している。断面図に示すように回路基板1の内層および外層にはグランドパターン3や配線パターン4が少なくとも2層以上で形成されている。   In the electronic component package according to Embodiment 1 of the present invention, as shown in the perspective view of FIG. 1, an electromagnetic wave shielding layer 2 is formed on a circuit board 1 formed of a multilayer board. FIG. 2 is a cross-sectional view of the electronic component package indicated by AA in FIG. As shown in the sectional view, the ground pattern 3 and the wiring pattern 4 are formed in at least two layers on the inner layer and the outer layer of the circuit board 1.

また、前記回路基板1はガラスエポキシ樹脂等の絶縁材からなり、ビアホール(図示せず)で層間を電気的に接続されている。本実施の形態では4層基板で説明している。   The circuit board 1 is made of an insulating material such as glass epoxy resin, and the layers are electrically connected by via holes (not shown). In this embodiment mode, a four-layer substrate is used.

そして、実施の形態1の電子部品パッケージは前記グランドパターン3を有する回路基板1の上面に実装部品5(IC、チップ抵抗、チップコンデンサーなど)を配線パターン4の上にリフローによるはんだで実装している。   In the electronic component package of the first embodiment, a mounting component 5 (IC, chip resistor, chip capacitor, etc.) is mounted on the wiring pattern 4 on the upper surface of the circuit board 1 having the ground pattern 3 by reflow soldering. Yes.

一方、電子部品パッケージは実装部品5と反対面にある回路基板1の下面の配線パターン4とマザーボード(図示せず)とをはんだで実装しマザーボードと導通させて使用される。   On the other hand, the electronic component package is used by mounting the wiring pattern 4 on the lower surface of the circuit board 1 on the opposite side of the mounting component 5 and a mother board (not shown) by soldering so as to be electrically connected to the mother board.

上述の実装部品5(IC、チップ抵抗、チップコンデンサーなど)が実装された回路基板1の上面は、無機質フィラーを含有するエポキシ樹脂からなる封止樹脂によって封止体6が形成される。この封止体6は回路基板1の平面形状と略同一形であり、両者が一体となって電子部品パッケージを構成する。   On the upper surface of the circuit board 1 on which the above-described mounting component 5 (IC, chip resistor, chip capacitor, etc.) is mounted, a sealing body 6 is formed by a sealing resin made of an epoxy resin containing an inorganic filler. The sealing body 6 has substantially the same shape as the planar shape of the circuit board 1, and both form an integrated electronic component package.

この封止体6に用いられる無機質フィラー入りエポキシ樹脂は耐湿性、耐候性、絶縁性及び耐熱性に優れると共に、前述のガラスエポキシ樹脂からなる回路基板1とは異なる成分構成でできている。前記封止体6の表面に電磁波シールド層2を形成する。この電磁波シールド層2を形成するにあたり、封止体6の表面を化学的に処理することにより、めっきが実用的強度で形成されるのを可能としている。   The epoxy resin with an inorganic filler used for the sealing body 6 is excellent in moisture resistance, weather resistance, insulation and heat resistance, and has a different component structure from the circuit board 1 made of the glass epoxy resin. The electromagnetic shielding layer 2 is formed on the surface of the sealing body 6. In forming the electromagnetic wave shielding layer 2, the surface of the sealing body 6 is chemically treated, so that plating can be formed with practical strength.

また、実施の形態1では図2に示したように回路基板1の端面にグランドパターン3の一部が外部表面に露出している。   In the first embodiment, as shown in FIG. 2, a part of the ground pattern 3 is exposed on the end surface of the circuit board 1 on the outer surface.

前記封止体6の表面に形成される電磁波シールド層2は無電解銅めっき法によって無機質フィラーを含有するエポキシ樹脂の上に銅を析出して第1層7が形成されている。   The electromagnetic wave shielding layer 2 formed on the surface of the sealing body 6 has a first layer 7 formed by depositing copper on an epoxy resin containing an inorganic filler by an electroless copper plating method.

さらに電解銅めっき法で第1層7の上に電解銅を析出させ第2層8を形成することで、封止体6の表面の抵抗を下げることができ、より電磁波シールド性を向上することができる。   Furthermore, electrolytic copper is deposited on the first layer 7 by the electrolytic copper plating method to form the second layer 8, whereby the resistance of the surface of the sealing body 6 can be lowered and the electromagnetic wave shielding property can be further improved. Can do.

また、第1層7と第2層8で形成した銅層のみでは大気中の酸素によって銅の表面が酸化し封止体6の表面の抵抗が上がり、電磁波シールド性が低下する。   In addition, with only the copper layer formed of the first layer 7 and the second layer 8, the surface of copper is oxidized by oxygen in the atmosphere, the resistance of the surface of the sealing body 6 is increased, and the electromagnetic shielding properties are reduced.

そこで、第2層8の上に銅の酸化を防止するために電解錫めっき法、無電解ニッケルめっき法、電解ニッケルめっき法のいずれかで錫層またはニッケル層による第3層9を形成している。   Therefore, a third layer 9 made of a tin layer or a nickel layer is formed on the second layer 8 by any one of an electrolytic tin plating method, an electroless nickel plating method, and an electrolytic nickel plating method in order to prevent copper oxidation. Yes.

また、このようにして形成された電磁波シールド層2は封止体6の周辺及び回路基板1の端面のグランドパターン3の露出部にも電磁波シールド層2が形成されることになる。その結果、外部の電磁波ノイズから実装部品5をシールドすることができる。また、同様に電子部品パッケージの内部から発生する電磁波ノイズを外部に放出することも無いため他の周辺の電子部品、電子機器に電波障害を与えることも無い。   Further, the electromagnetic wave shielding layer 2 formed in this way is also formed on the periphery of the sealing body 6 and the exposed portion of the ground pattern 3 on the end face of the circuit board 1. As a result, the mounting component 5 can be shielded from external electromagnetic noise. Similarly, since electromagnetic noise generated from the inside of the electronic component package is not emitted to the outside, other peripheral electronic components and electronic devices are not affected by radio waves.

このように、無機質フィラーを含有するエポキシ樹脂からなる封止体6の表面に第1層7として無電解銅めっき層、第2層8として電解銅めっき層、第3層9として銅の酸化を防止する層(錫層またはニッケル層)を形成して電磁波シールド層2を形成することができる。   Thus, the electroless copper plating layer as the first layer 7, the electrolytic copper plating layer as the second layer 8, and the copper oxidation as the third layer 9 on the surface of the sealing body 6 made of an epoxy resin containing an inorganic filler. The electromagnetic wave shielding layer 2 can be formed by forming a preventing layer (tin layer or nickel layer).

従来、無電解ニッケルめっき法で形成されるニッケルめっき層を電磁波シールド層2に使用していたが、Ni,Ni−P,Ni−B皮膜は導電性に劣り、昨今の小型化、低背化、軽量化、高周波化するなかで、ニッケルめっき皮膜では十分に電磁波をシールドすることが困難になってきている。また、シールド性を向上させるためにはシールド皮膜の導電性が低ければ低いほど良いことが分かっており、簡便な方法であるめっき法で形成できる銅皮膜に着目した。銅の導電性を1.0とすると、電解Niめっき皮膜は0.22、無電解Ni−1%B皮膜は0.10、無電解Ni−2.1%Pで0.057、無電解Ni−7%Pで0.024である。   Conventionally, a nickel plating layer formed by an electroless nickel plating method has been used for the electromagnetic wave shielding layer 2, but the Ni, Ni-P, and Ni-B coatings are inferior in electrical conductivity, and have been reduced in size and height recently. In lighter weight and higher frequency, it has become difficult to sufficiently shield electromagnetic waves with a nickel plating film. Moreover, in order to improve shielding properties, it has been found that the lower the conductivity of the shield film, the better, and attention was paid to a copper film that can be formed by a simple plating method. When the conductivity of copper is 1.0, the electrolytic Ni plating film is 0.22, the electroless Ni-1% B film is 0.10, the electroless Ni-2.1% P is 0.057, the electroless Ni It is 0.024 at -7% P.

また、Niめっき皮膜に比べ、硬度も低く、耐熱性にも優れ、加熱によるクラックの発生も無い。   Moreover, compared with a Ni plating film, hardness is low, it is excellent also in heat resistance, and there is no generation | occurrence | production of the crack by heating.

しかし、前述のように無電解銅めっきで形成した第1層7だけではめっき皮膜の緻密さ、皮膜物性が劣るため、本実施の形態1に示すように、第1層7の上面に第2層8を形成しめっき皮膜の物性を確保している。   However, as described above, since only the first layer 7 formed by electroless copper plating is inferior in the density and physical properties of the plating film, the second layer is formed on the upper surface of the first layer 7 as shown in the first embodiment. Layer 8 is formed to ensure the physical properties of the plating film.

また、銅は大気中で酸化しやすいため皮膜の抵抗が上がり、電磁波シールド性が劣ってくるという欠点を有するため、第3層9として、銅の酸化を防止する目的でニッケルめっき皮膜または錫めっき皮膜を採用している。   In addition, since copper easily oxidizes in the air, the resistance of the film increases and the electromagnetic shielding properties are inferior. Therefore, the third layer 9 is a nickel plating film or tin plating for the purpose of preventing copper oxidation. A film is used.

特に、塩水噴霧試験など環境試験においては純ニッケル皮膜より、リンを含有することで著しく耐環境特性は向上する。   In particular, in an environmental test such as a salt spray test, environmental resistance characteristics are remarkably improved by containing phosphorus from a pure nickel film.

特に、Pを6%以上含有することでNi−P皮膜の耐環境性は著しく向上する。   In particular, by containing 6% or more of P, the environmental resistance of the Ni-P coating is remarkably improved.

また、錫めっき皮膜はめっき後ポーラスなめっき皮膜であっても、電子部品パッケージをマザーボードにはんだ実装する時、はんだリフロー温度を230℃(錫の融点)以上の温度に上げると、錫はいったん溶融するため緻密な膜となって、耐環境性に優れた膜となる。   Also, even if the tin plating film is a porous plating film after plating, when the solder reflow temperature is raised to a temperature of 230 ° C. (melting point of tin) or higher when the electronic component package is solder-mounted on the motherboard, the tin is once melted. Therefore, it becomes a dense film and a film excellent in environmental resistance.

従って、銅の良好な導電性、ニッケルまたは錫の良好な耐環境性を組み合わせることにより、薄いめっき皮膜でも十分な電磁波シールド性を得ることができる。   Therefore, by combining the good conductivity of copper and the good environmental resistance of nickel or tin, sufficient electromagnetic wave shielding properties can be obtained even with a thin plating film.

また、最近の高周波化に対応して、さらに高いシールド効果が必要になってもNi皮膜に比べ薄いCuめっき皮膜の厚みで可能となった。銅の酸化を防止する第3層9は極薄いめっき皮膜で良い。   Also, in response to the recent increase in frequency, even if a higher shielding effect is required, it has become possible with a thinner Cu plating film thickness than the Ni film. The third layer 9 for preventing copper oxidation may be an extremely thin plating film.

(実施の形態2)
以下、実施の形態2を用いて、本発明の特に請求項4〜12に記載の発明について説明する。
(Embodiment 2)
Hereinafter, the second and second embodiments of the present invention will be described.

なお、実施の形態1の構成と同様の構成を有するものについては、同一符号を付しその説明を省略する。   In addition, about the thing which has the structure similar to the structure of Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

図3、図4は、上記の構成からなる電子部品パッケージの製造方法を示したものである。   3 and 4 show a method for manufacturing an electronic component package having the above-described configuration.

図3(a)に示すように各単一回路基板毎にダイシングライン(図示せず)が想定される集合回路基板11のいずれかの層(本実施の形態2では多層回路基板の2層目)にグランドパターン3を有している。この集合回路基板11の各単一基板毎に実装部品5(IC、チップ抵抗、チップコンデンサーなど)を所定の位置に搭載し、ダイボンド、ワイヤボンド、リフローによるはんだ接続などの手段で集合回路基板11に実装する。   As shown in FIG. 3A, any layer of the collective circuit board 11 in which a dicing line (not shown) is assumed for each single circuit board (in the second embodiment, the second layer of the multilayer circuit board). ) Has a ground pattern 3. A mounting component 5 (IC, chip resistor, chip capacitor, etc.) is mounted at a predetermined position for each single substrate of the collective circuit board 11, and the collective circuit board 11 is used by means such as die bonding, wire bonding, and solder connection by reflow. To implement.

次に、図3(b)に示すように集合回路基板11の上面全体に無機質フィラー含有エポキシ樹脂を充填し、集合回路基板11の上に均一な厚さの封止体6を形成して実装部品5を樹脂封止する。その後、封止体6の厚さを揃えるため、研削盤で表面研削を行う。   Next, as shown in FIG. 3B, the entire upper surface of the collective circuit board 11 is filled with an epoxy resin containing an inorganic filler, and a sealing body 6 having a uniform thickness is formed on the collective circuit board 11 and mounted. The component 5 is resin-sealed. Then, in order to make the thickness of the sealing body 6 uniform, surface grinding is performed with a grinding machine.

次に、図3(c)はダイシングによりダイシングライン(図示せず)に沿って封止体6の上から格子状に切り込みのスリット部12を入れ、集合回路基板11の略下半部を残した状態でハーフダイシングを行う。このハーフダイシングによって封止体6は各単一回路基板毎にスリット部12の周面が露出すると共に、接地用グランドパターン3の一端部も集合回路基板11から露出することになる。   Next, in FIG. 3C, slit portions 12 cut in a lattice shape from above the sealing body 6 are inserted along a dicing line (not shown) by dicing, and the substantially lower half of the collective circuit board 11 is left. Half dicing is performed in the state. By this half dicing, the sealing body 6 exposes the peripheral surface of the slit portion 12 for each single circuit board, and also exposes one end of the grounding ground pattern 3 from the collective circuit board 11.

そして、上記工程で、ハーフダイシングが終了した封止体6の樹脂のガラス転移点(Tg)以上の温度で熱処理を行う。本発明の封止体6の樹脂のTgは150℃であるため150℃で実施した。   And in the said process, it heat-processes at the temperature more than the glass transition point (Tg) of resin of the sealing body 6 which the half dicing completed. Since Tg of resin of the sealing body 6 of this invention is 150 degreeC, it implemented at 150 degreeC.

次に、図3(d)、図4(e)に示すように、封止体6の樹脂の表面を粗化する目的で、エチレングリコールモノブチルエーテルと水酸化ナトリウム混合液で樹脂を膨潤させ、その後過マンガン酸カリウムと水酸化ナトリウム混合液に浸漬する。その後、硫酸で中和処理して樹脂表面を粗化する。   Next, as shown in FIGS. 3D and 4E, for the purpose of roughening the surface of the resin of the sealing body 6, the resin is swollen with a mixture of ethylene glycol monobutyl ether and sodium hydroxide, Then, it is immersed in a mixed solution of potassium permanganate and sodium hydroxide. Thereafter, the resin surface is roughened by neutralization with sulfuric acid.

次に、樹脂表面に30μm以下の表面粗化部13を形成することを目的に封止体6の樹脂中の無機質フィラーをふっ化水素酸溶液でエッチングする。このふっ化水素酸溶液を用いることにより、スリット部12に形成された集合回路基板11の一部に露出した銅パターンを侵すことなく、封止体6の樹脂中の無機質フィラーをエッチングし、次工程の無電解銅めっき皮膜との密着性を著しく向上させることができる。   Next, the inorganic filler in the resin of the sealing body 6 is etched with a hydrofluoric acid solution for the purpose of forming a surface roughened portion 13 of 30 μm or less on the resin surface. By using this hydrofluoric acid solution, the inorganic filler in the resin of the sealing body 6 is etched without damaging the copper pattern exposed to a part of the collective circuit board 11 formed in the slit portion 12. The adhesion with the electroless copper plating film in the process can be remarkably improved.

無電解銅めっき工程としては、まず、アミノカルボン酸塩等の活性剤で樹脂表面の脱脂、コンディショニングを行う。次に、過硫酸ナトリウム、硫酸混合液で表面を軽くエッチングし、硫酸でスミアの除去を行う。次にパラジウムを樹脂表面に付与し、無電解銅めっき液で銅めっきを行い、約1μmの厚さの無電解銅めっき層からなる第1層7を形成する。   In the electroless copper plating step, first, the resin surface is degreased and conditioned with an activator such as an aminocarboxylate. Next, the surface is lightly etched with a mixed solution of sodium persulfate and sulfuric acid, and smear is removed with sulfuric acid. Next, palladium is applied to the resin surface and copper plating is performed with an electroless copper plating solution to form a first layer 7 made of an electroless copper plating layer having a thickness of about 1 μm.

次に、図4(f)に示すように、ジエタノールアミン、硫酸混合液で表面を脱脂し、硫酸で表面を活性化した後、硫酸銅めっき液で電解銅めっきを行い、約1〜5μmの電解銅めっき層からなる第2層8を形成する。   Next, as shown in FIG. 4 (f), the surface is degreased with a mixed solution of diethanolamine and sulfuric acid, and after the surface is activated with sulfuric acid, electrolytic copper plating is performed with a copper sulfate plating solution, and an electrolysis of about 1 to 5 μm is performed. A second layer 8 made of a copper plating layer is formed.

次に、図4(g)に示すように、ジエタノールアミン、硫酸混合液で表面を脱脂し、過硫酸ナトリウム、硫酸混合液で電解銅めっき層の表面を軽くエッチングし、銅めっき層上の酸化膜を除去した後、硫酸で酸活性し、電解錫めっきを行い、約1〜6μmの電解錫めっき層からなる第3層9を形成する。   Next, as shown in FIG. 4G, the surface is degreased with a mixture of diethanolamine and sulfuric acid, the surface of the electrolytic copper plating layer is lightly etched with a mixture of sodium persulfate and sulfuric acid, and an oxide film on the copper plating layer Then, acid activation with sulfuric acid is performed, and electrolytic tin plating is performed to form a third layer 9 made of an electrolytic tin plating layer of about 1 to 6 μm.

尚、電解錫めっきを行うとき、錫めっき浴を周波数15〜60Hz超振動攪拌をすることにより、錫めっき浴の液流動性が良くなり、めっき析出速度が上がりめっき時間の短縮化が図れると共に、ハーフダイシングした封止体6−集合回路基板11の一部スリット部12へのめっきカバーリング性が著しく向上し、より電磁波シールド性効果が良くなる。   In addition, when performing electrolytic tin plating, the tin plating bath is vibrated at a frequency of 15 to 60 Hz, thereby improving the fluidity of the tin plating bath, increasing the plating deposition rate, and shortening the plating time. The half-diced sealing body 6—the plating covering property to the partial slit portion 12 of the collective circuit board 11 is remarkably improved, and the electromagnetic wave shielding effect is further improved.

また、錫めっき層よりなる第3層9の形成品をピーク温度260℃のはんだリフロー炉に通すことにより、錫めっき層が溶融し、より緻密な皮膜となり、耐環境性が一段と向上した。   Moreover, by passing the formed product of the third layer 9 made of a tin plating layer through a solder reflow furnace having a peak temperature of 260 ° C., the tin plating layer was melted to form a denser film, and the environmental resistance was further improved.

第3層9の他の形成方法として、第2層8の電解銅めっき層の形成後、スルファミン酸ニッケルめっき液により1〜2μmの電解ニッケルめっき層を形成し環境試験(耐湿試験)を行ったところ、第1層7、第2層8を形成する銅の酸化が起こらずに電磁波シールド性の劣化は見られなかった。   As another method for forming the third layer 9, after the formation of the electrolytic copper plating layer of the second layer 8, an electrolytic nickel plating layer of 1 to 2 μm was formed with a nickel sulfamate plating solution, and an environmental test (humidity test) was performed. However, the copper forming the first layer 7 and the second layer 8 did not oxidize, and no deterioration of the electromagnetic shielding property was observed.

また、第3層9の他の形成方法として、第2層8の電解銅めっき層の形成後、水素化ホウ素ナトリウムを還元剤とする無電解Ni−B浴で無電解ニッケルめっき浴で、1〜2μmの無電解Ni−Bめっき層を形成し環境試験(耐湿試験)を行ったところ、第1層7、第2層8を形成する銅の酸化が起こらずに電磁波シールド性の劣化は見られなかった。   As another method of forming the third layer 9, after the formation of the electrolytic copper plating layer of the second layer 8, an electroless Ni-B bath using sodium borohydride as a reducing agent, an electroless nickel plating bath, 1 When an electroless Ni—B plating layer of ˜2 μm was formed and an environmental test (humidity resistance test) was performed, the oxidation of copper forming the first layer 7 and the second layer 8 did not occur, and deterioration of the electromagnetic shielding properties was observed. I couldn't.

さらに、第3層9の他の形成方法として、第2層8の電解銅めっき層の形成後、次亜リン酸ナトリウムを還元剤とする無電解Ni−P浴で無電解ニッケルめっき浴で、1〜2μmの無電解Ni−Pめっき層を形成し環境試験(耐湿試験)を行ったところ、第1層7、第2層8を形成する銅の酸化が起こらずに電磁波シールド性の劣化は見られなかった。   Furthermore, as another method for forming the third layer 9, after the formation of the electrolytic copper plating layer of the second layer 8, an electroless nickel plating bath with an electroless Ni-P bath using sodium hypophosphite as a reducing agent, When an electroless Ni—P plating layer of 1 to 2 μm was formed and an environmental test (moisture resistance test) was performed, the oxidation of copper forming the first layer 7 and the second layer 8 did not occur, and the electromagnetic wave shielding property was deteriorated. I couldn't see it.

又、沿岸近くあるいは海上で使用される機器に電子部品パッケージを搭載する場合の評価として、塩水噴霧試験がある。そこで、第3層9の皮膜について、塩水噴霧試験(72時間)を行ったところ、電解ニッケルめっき、無電解Ni−Bめっき、6%以下のPを含有する無電解ニッケルめっき層は低周波数域でおおよそ10dB、1000MHzで25dB程、電磁波シールド効果が低下した。しかし、6%以上のPを含有する無電解Ni−P層は電磁波シールド効果に変化が見られなかった。   Moreover, there is a salt spray test as an evaluation when an electronic component package is mounted on equipment used near the coast or on the sea. Then, when the salt spray test (72 hours) was performed about the film | membrane of the 3rd layer 9, electroless nickel plating, electroless Ni-B plating, and the electroless nickel plating layer containing 6% or less of P are a low frequency region. The electromagnetic wave shielding effect was reduced by about 10 dB and 25 dB at 1000 MHz. However, the electroless Ni—P layer containing 6% or more of P showed no change in the electromagnetic wave shielding effect.

従って、厳しい環境条件を要求される場合は、無電解Ni−Pめっき浴で形成した皮膜で、Pの含有量が6%を超える中P(P含有量6〜8%)、高P(P含有量8%以上)タイプのニッケルめっき皮膜が適している。   Therefore, when harsh environmental conditions are required, it is a film formed with an electroless Ni-P plating bath, and the content of P exceeds 6% P (P content 6-8%), high P (P A nickel plating film with a content of 8% or more is suitable.

次の工程として、第3層9のめっき層を形成した後、100℃、1時間の熱処理を行う。このことにより、封止体6の樹脂とめっき層との密着性は良くなり、粘着テープによるクロスカット試験で良好な結果が得られた。また、めっき層の形成の最後である第3層9の形成後のみでなく、第1層7、第2層8の各めっき層形成後に100℃以上、1時間の熱処理を行うことにより更に密着性が向上した。   As the next step, after forming the plating layer of the third layer 9, heat treatment is performed at 100 ° C. for 1 hour. Thereby, the adhesiveness between the resin of the sealing body 6 and the plating layer was improved, and a good result was obtained in a cross-cut test using an adhesive tape. Further, not only after the formation of the third layer 9, which is the last of the formation of the plating layer, but also after the formation of the respective plating layers of the first layer 7 and the second layer 8, further heat treatment is performed at 100 ° C. for 1 hour. Improved.

上述の各工程を実施し、封止体6の外表面に第1層7としての無電解銅めっき層、第2層8としての電解銅めっき層、第3層9としての銅の酸化防止層からなる電磁波シールド層を形成する。この時、ハーフダイシングによって封止体6のスリット部12にもめっきが回り込んで、各単一回路基板毎に封止体6の周囲に電磁波シールド層2が形成されるために、電磁波シールド層2が接地用グランドパターン3の露出している集合回路基板11のグランドパターン露出部10にも付着し、電磁波シールド層2がシールド作用を発揮し、実装部品5を電界ノイズや磁界ノイズからシールドすることができる。   The above-mentioned steps are carried out, and an electroless copper plating layer as the first layer 7, an electrolytic copper plating layer as the second layer 8, and a copper antioxidant layer as the third layer 9 on the outer surface of the sealing body 6. An electromagnetic wave shielding layer made of is formed. At this time, since the plating also wraps around the slit portion 12 of the sealing body 6 by half dicing, and the electromagnetic shielding layer 2 is formed around the sealing body 6 for each single circuit substrate, the electromagnetic shielding layer 2 also adheres to the ground pattern exposed portion 10 of the collective circuit board 11 where the grounding ground pattern 3 is exposed, and the electromagnetic wave shielding layer 2 exerts a shielding action, and the mounting component 5 is shielded from electric field noise and magnetic field noise. be able to.

さらに、図4(h)に示すように、集合回路基板11の全面に無機質フィラー含有エポキシ樹脂を充填し、ハーフダイシングすることにより封止体6の各単一回路基板毎のスリット部12の周面を露出させ、一度に多数同時に電磁波シールド層2を形成することができる。   Further, as shown in FIG. 4 (h), the entire surface of the collective circuit board 11 is filled with an inorganic filler-containing epoxy resin, and half-dicing is performed, whereby the periphery of the slit portion 12 for each single circuit board of the sealing body 6 is obtained. The electromagnetic wave shielding layer 2 can be formed simultaneously at the same time by exposing the surface.

そして、最後に集合回路基板11に想定されたダイシングに沿って再びダイシングし、各単一回路基板毎に完全に切り離して一つ一つの電子部品パッケージ14に分割する。   Finally, dicing is again performed along the dicing assumed for the collective circuit board 11, and each single circuit board is completely separated and divided into individual electronic component packages 14.

なお、回路基板に設けたグランドパターンの形状及び一端部の露出個所は上記実施の形態に限定されない。   The shape of the ground pattern provided on the circuit board and the exposed part of the one end are not limited to the above embodiment.

本発明にかかる電子部品パッケージ及びその製造方法は、封止体との密着性、耐環境性、電磁波シールド効果に優れ電磁波シールド層を有し、各種電子機器、通信機器等に用いられる電子部品パッケージ及びそのシールド層形成技術として有用である。   The electronic component package and the manufacturing method thereof according to the present invention are excellent in adhesion to a sealing body, environment resistance, and electromagnetic wave shielding effect, and have an electromagnetic wave shielding layer, and are used for various electronic devices and communication devices. And as a shield layer forming technique thereof.

本発明の実施の形態1における電子部品パッケージの斜視図The perspective view of the electronic component package in Embodiment 1 of this invention 同実施の形態1における電子部品パッケージの断面図Sectional drawing of the electronic component package in Embodiment 1 (a)〜(d)本発明の実施の形態2における電子部品パッケージの製造方法の各工程毎の断面図(A)-(d) Sectional drawing for every process of the manufacturing method of the electronic component package in Embodiment 2 of this invention. (e)〜(h)本発明の実施の形態2における電子部品パッケージの製造方法の各工程毎の断面図(E)-(h) Sectional drawing for every process of the manufacturing method of the electronic component package in Embodiment 2 of this invention. 従来の電子部品パッケージの斜視図A perspective view of a conventional electronic component package

符号の説明Explanation of symbols

1 回路基板
2 電磁波シールド層
3 グランドパターン
4 配線パターン
5 実装部品
6 封止体
7 第1層
8 第2層
9 第3層
10 グランドパターン露出部
11 集合回路基板
12 スリット部
13 表面粗化部
14 電子部品パッケージ
DESCRIPTION OF SYMBOLS 1 Circuit board 2 Electromagnetic wave shield layer 3 Ground pattern 4 Wiring pattern 5 Mounting component 6 Sealing body 7 1st layer 8 2nd layer 9 3rd layer 10 Ground pattern exposure part 11 Collective circuit board 12 Slit part 13 Surface roughening part 14 Electronic component package

Claims (12)

グランドパターンを有する回路基板と、この回路基板の上面に実装された電子部品からなる実装部品と、この実装部品を封止する無機質フィラーを含有するエポキシ樹脂からなる封止体と、この封止体の表面に形成した第1層としての無電解銅めっき層と、第2層としての電解銅めっき層と、第3層としての銅の酸化を防止する皮膜層からなるシールド層とからなり、このシールド層を前記グランドパターンに接地した電子部品パッケージ。 A circuit board having a ground pattern, a mounting part made of an electronic component mounted on the upper surface of the circuit board, a sealing body made of an epoxy resin containing an inorganic filler for sealing the mounting part, and the sealing body An electroless copper plating layer as the first layer formed on the surface of the copper, an electrolytic copper plating layer as the second layer, and a shield layer made of a coating layer for preventing oxidation of copper as the third layer. An electronic component package having a shield layer grounded to the ground pattern. 皮膜層が錫めっき層からなる請求項1に記載の電子部品パッケージ。 The electronic component package according to claim 1, wherein the coating layer comprises a tin plating layer. 皮膜層がニッケル、ニッケル−硼素またはニッケル−リンめっき層からなる請求項1に記載の電子部品パッケージ。 The electronic component package according to claim 1, wherein the coating layer comprises a nickel, nickel-boron or nickel-phosphorous plating layer. グランドパターンを有する回路基板の上面に電子部品からなる実装部品を実装し、この実装部品を無機質フィラーを含有するエポキシ樹脂からなる封止体で封止し、この封止体の表面に無電解銅めっきで第1層を形成する工程と、電解銅めっきで第2層を形成する工程と、銅の酸化を防止する皮膜で第3層を形成する工程によりシールド層を形成し、このシールド層をグランドパターンに接地する電子部品パッケージの製造方法。 A mounting component made of an electronic component is mounted on the upper surface of a circuit board having a ground pattern, and the mounting component is sealed with a sealing body made of an epoxy resin containing an inorganic filler, and the surface of the sealing body is electroless copper A shield layer is formed by a step of forming a first layer by plating, a step of forming a second layer by electrolytic copper plating, and a step of forming a third layer by a film that prevents oxidation of copper. A method of manufacturing an electronic component package that is grounded to a ground pattern. グランドパターンを有する回路基板の上面に電子部品からなる実装部品を実装し、この実装部品を無機質フィラーを含有するエポキシ樹脂からなる封止体で封止し、この封止体の上からグランドパターンが露出するように前記回路基板の一部を切削してスリット部を形成し、上記封止体の表面および切削面に無電解銅めっきで第1層を形成する工程と、電解銅めっきで第2層を形成する工程と、銅の酸化を防止する皮膜で第3層を形成する工程によりシールド層を形成し、このシールド層をグランドパターンに接地する電子部品パッケージの製造方法。 A mounting component made of an electronic component is mounted on the upper surface of a circuit board having a ground pattern, and the mounting component is sealed with a sealing body made of an epoxy resin containing an inorganic filler. A part of the circuit board is cut so as to be exposed to form a slit portion, and a first layer is formed by electroless copper plating on the surface and the cutting surface of the sealing body, and second by electrolytic copper plating. A method of manufacturing an electronic component package, wherein a shield layer is formed by a step of forming a layer and a step of forming a third layer with a film that prevents oxidation of copper, and the shield layer is grounded to a ground pattern. 100℃以上の熱処理工程を無電解銅めっきで第1層を形成する工程と、電解銅めっきで第2層を形成する工程と、銅の酸化を防止する皮膜で第3層を形成する工程の少なくともいずれか1つの工程の後に設けた請求項4または請求項5に記載の電子部品パッケージの製造方法。 A step of forming a first layer by electroless copper plating in a heat treatment step of 100 ° C. or higher, a step of forming a second layer by electrolytic copper plating, and a step of forming a third layer by a film that prevents oxidation of copper The method for manufacturing an electronic component package according to claim 4 or 5 provided after at least one of the steps. 20μm以下の表面粗さを有する封止体に無電解銅めっき皮膜を形成する請求項4または請求項5に記載の電子部品パッケージの製造方法。 The method for manufacturing an electronic component package according to claim 4 or 5, wherein an electroless copper plating film is formed on a sealing body having a surface roughness of 20 µm or less. 第2層が電解銅めっき、第3層が電解錫めっきの皮膜形成工程で、めっき液を一定の周波数で振動させる周波数15〜60Hz以下の超振動攪拌する請求項5に記載の電子部品パッケージの製造方法。 6. The electronic component package according to claim 5, wherein the second layer is an electrolytic copper plating and the third layer is an electrolytic tin plating film forming step, and the vibration of the plating solution is vibrated at a constant frequency and the vibration is stirred at a frequency of 15 to 60 Hz or less. Production method. 第3層が無電解ニッケル−リンめっき皮膜形成工程で、ニッケルめっき皮膜中に6%以上のリンを含有させる請求項5に記載の電子部品パッケージの製造方法。 6. The method of manufacturing an electronic component package according to claim 5, wherein the third layer is an electroless nickel-phosphorus plating film forming step, and the nickel plating film contains 6% or more of phosphorus. 無電解銅めっき工程の前処理工程として、樹脂封止された電子部品を熱処理する工程と、封止体の表面の樹脂を粗化するエッチング工程と、封止体の表面の無機質フィラーを粗化するエッチング工程と、銅めっきを析出させるためのパラジウム付与工程と、銅を析出させる無電解銅めっき工程とを有する請求項4または請求項5に記載の電子部品パッケージの製造方法。 As a pretreatment process for the electroless copper plating process, a process for heat treating resin-encapsulated electronic components, an etching process for roughening the resin on the surface of the sealing body, and a roughening of the inorganic filler on the surface of the sealing body The manufacturing method of the electronic component package of Claim 4 or 5 which has an etching process to perform, a palladium provision process for depositing copper plating, and an electroless copper plating process to deposit copper. 樹脂封止された電子部品を熱処理する工程が封止体のガラス転移点(Tg)以上の熱処理である請求項10に記載の電子部品パッケージの製造方法。 The method for manufacturing an electronic component package according to claim 10, wherein the step of heat-treating the resin-encapsulated electronic component is a heat treatment at or above the glass transition point (Tg) of the encapsulant. 封止体の樹脂表面の無機質フィラーを粗化するエッチング液がふっ化水素酸である請求項10に記載の電子部品パッケージの製造方法。 The method for manufacturing an electronic component package according to claim 10, wherein the etching solution for roughening the inorganic filler on the resin surface of the encapsulant is hydrofluoric acid.
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