JP2014150213A - 半導体装置及び半導体装置の製造方法 - Google Patents
半導体装置及び半導体装置の製造方法 Download PDFInfo
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Abstract
【解決手段】半導体パッケージ1は、半導体チップ20と、半導体チップ20上に設けられた突起状のピラー電極24と、半導体チップ20及びピラー電極24を覆う樹脂30とを含む。樹脂30は、凹部31を有し、凹部31の底面31aでピラー電極24の先端部が樹脂30から露出する。樹脂30の凹部31からピラー電極24の先端部を露出させるようにすることで、ピラー電極24が高くなるのを抑え、微細な或いは狭ピッチのピラー電極24の形成を可能にする。
【選択図】図1
Description
図1は第1の実施の形態に係る半導体パッケージの一例を示す図である。尚、図1は第1の実施の形態に係る半導体パッケージの一例の断面模式図である。また、図2は図1のX部の一例を示す図である。
図3は図1のX部の別例を示す図である。
樹脂30には、図3(A)に示すように、凹部31の底面31aで、ピラー電極24の半田部24bの上面のみが露出するように、凹部31を設けることもできる。このほか、樹脂30には、図3(B)に示すように、凹部31の底面31aで、ピラー電極24の半田部24bと電極部24aの一部の側面が露出するように、凹部31を設けることもできる。
図4〜図13は第1の実施の形態に係る半導体パッケージの形成方法の一例を示す図である。
図4に示すように、トランジスタ等の素子が形成された半導体基板21上に、その素子に電気的に接続された導電部(配線、ビア)を含む配線層22を形成した基板20aを準備する。ここでは一例として、基板20aに、後述のダイシング工程(図9)で半導体チップ20として個片化される構造部(個々の半導体チップ20に相当する構造部)が複数含まれているものとする。尚、基板20aは、1つ分の半導体チップ20に相当する構造部のみが含まれた構成とすることもできる。準備された基板20aの配線層22上に、例えばスパッタ法を用いて、シード層25を形成する。次いで、レジスト材料を塗布し、その露光及び現像を行って、ピラー電極24を形成する領域に開口部26aを設けたレジスト26を形成する。
続いて、半導体チップ20を用いた半導体パッケージ1の形成方法の一例について、図10〜図13を参照して説明する。
図14は第1の実施の形態に係る半導体装置の一例を示す図である。尚、図14は第1の実施の形態に係る半導体装置の一例の断面模式図である。
図15及び図16は第1の実施の形態に係る半導体装置の形成方法の一例を示す図である。
ピラー電極64は、ピラー電極24と接合した時に、半導体チップ60と半導体パッケージ1の間に所定のギャップGが確保されるような高さで、予め形成される。
図17は別形態の半導体装置の一例を説明する図である。尚、図17は別形態の半導体装置の一例の断面模式図である。
半導体パッケージ110は、リード端子12の一部を除くリードフレーム10、リードフレーム10上に搭載された半導体チップ20、及びリードフレーム10と半導体チップ20とを接続するワイヤ50が樹脂130で覆われた構造を有している。この半導体パッケージ110の樹脂130には、上記の半導体パッケージ1のような凹部31は設けられていない。半導体チップ20には、このような樹脂130の表面に露出するような、比較的高さの高いピラー電極124が設けられている。
半導体装置1Aに用いる半導体パッケージ1の樹脂30には、上記のような凹部31のほか、凹部31に連通する溝を設けてもよい。
図23は第2の実施の形態に係る半導体装置の第1の変形例を示す図である。尚、図23は第2の実施の形態に係る半導体装置の変形例の断面模式図であって、図21のL1−L1線の位置に相当する断面模式図である。
図24は第2の実施の形態に係る半導体装置の第2の変形例を示す図である。尚、図24(A)〜図24(C)は第2の実施の形態に係る半導体装置の各変形例の平面模式図である。
図25及び図26は第3の実施の形態に係る半導体装置の一例を示す図である。尚、図25は第3の実施の形態に係る半導体装置の一例の平面模式図、図26は図25のL2−L2断面模式図である。
尚、樹脂30に設ける溝32は、必ずしも凹部31と同じ深さであることを要しない。
半導体装置1Cでは、樹脂30に設けられる一定深さの凹部31によってピラー電極24の高さが高くなるのが抑えられると共に、ワイヤ50が樹脂30内に収められ、凹部31よりは浅い、幅広の溝32からアンダーフィル材70が導入される。凹部31よりも浅い溝32を設けた場合でも、幅広の溝32から半導体パッケージ1と半導体チップ60の間に十分且つ効率的にアンダーフィル材70を充填し、接続信頼性に優れた半導体装置1Cを実現することができる。
図28は第3の実施の形態に係る半導体装置の第2の変形例を示す図である。尚、図28は第3の実施の形態に係る半導体装置の変形例の断面模式図である。
図29は第4の実施の形態に係る半導体パッケージの一例を示す図である。尚、図29は第4の実施の形態に係る半導体パッケージの一例の平面模式図である。
次に、第5の実施の形態について説明する。
図32に示す半導体装置1Eは、半導体パッケージ1に、それに内蔵される半導体チップ20よりも平面サイズの小さい半導体チップ60が実装されている点で、上記第1の実施の形態に係る半導体装置1Aと相違する。
図33は別形態の半導体装置の一例を示す図である。
図34は第6の実施の形態に係る半導体装置の一例を示す図である。尚、図34は第6の実施の形態に係る半導体装置の一例の断面模式図である。
図35は第7の実施の形態に係る半導体装置の一例を示す図である。尚、図35は第7の実施の形態に係る半導体装置の一例の断面模式図である。
(付記1) 第1の基板と、
前記第1の基板を覆う樹脂と、
前記樹脂に設けられた凹部と、
前記第1の基板上に設けられ、前記凹部の底面で前記樹脂から露出した部分を有する突起状の第1の電極と
を含むことを特徴とする半導体装置。
第1の導電体を有する第1の部分と、
前記第1の電極の先端に位置し、前記第1の導電体とは異なる第2の導電体を有する第2の部分と
を含むことを特徴とする付記1に記載の半導体装置。
前記第1の部分は、前記樹脂で覆われていることを特徴とする付記2に記載の半導体装置。
(付記5) 前記第1の基板上に設けられたパッドと、
一部が前記樹脂内に設けられたリードフレームと、
前記樹脂内に設けられ、一端が前記パッドに接続され、他端が前記リードフレームに接続され、一部が前記凹部の前記底面よりも高い位置にあるワイヤと
を含むことを特徴とする付記1乃至4のいずれか一項に記載の半導体装置。
一部が前記樹脂内に設けられたリードフレームと、
前記樹脂内に設けられ、一端が前記パッドに接続され、他端が前記リードフレームに接続され、一部が前記第1の電極よりも高い位置にあるワイヤと
を含むことを特徴とする付記1乃至4のいずれか一項に記載の半導体装置。
前記第2の基板上に設けられ、前記凹部内で前記第1の電極と接続された第2の電極と
を含むことを特徴とする付記1乃至6のいずれか一項に記載の半導体装置。
前記凹部内に設けられ、前記第1の電極及び前記第2の電極を覆う絶縁層を含むことを特徴とする付記7に記載の半導体装置。
前記第2の基板の、前記第2の電極が設けられた面は、前記樹脂の、前記凹部の上端と前記底面との間に位置することを特徴とする付記7又は8に記載の半導体装置。
(付記11) 第1の基板上に、突起状の第1の電極を形成する工程と、
前記第1の基板を封止し、前記第1の電極の一部が露出する凹部を有する樹脂を形成する工程と
を含むことを特徴とする半導体装置の製造方法。
前記樹脂で前記第1の基板及び前記第1の電極を封止する工程と、
前記樹脂を部分的に除去し、前記第1の電極の前記一部が露出する前記凹部を形成する工程と
を含むことを特徴とする付記11に記載の半導体装置の製造方法。
第1の導電体を有する第1の部分を形成する工程と、
前記第1の部分上に、前記第1の導電体とは異なる第2の導電体を有する第2の部分を形成する工程と
を含むことを特徴する付記11又は12に記載の半導体装置の製造方法。
前記凹部を有する前記樹脂を形成する工程は、前記第1の部分を前記樹脂で覆う工程を含むことを特徴とする付記13に記載の半導体装置の製造方法。
前記第1の基板上にパッドを形成する工程と、
前記第1の基板をリードフレーム上に配置する工程と、
前記リードフレームと前記パッドとをワイヤで接続する工程と
を含み、
前記ワイヤの一部が、前記凹部の底面よりも高い位置にあることを特徴する付記11乃至14のいずれか一項に記載の半導体装置の製造方法。
前記第1の基板と、表面に第2の電極を有する第2の基板とを対向させる工程と、
前記第1の電極と前記第2の電極とを接続する工程と
を含むことを特徴とする付記11乃至15のいずれか一項に記載の半導体装置の製造方法。
前記絶縁層を形成する工程は、前記溝から前記凹部に前記絶縁層を導入する工程を含むことを特徴とする付記17に記載の半導体装置の製造方法。
1A,1B,1C,1D,1E,1F,1G,100,100a 半導体装置
10 リードフレーム
11 ダイボンドステージ
12 リード端子
20,60 半導体チップ
20a 基板
21,61 半導体基板
22,62 配線層
23,82 電極パッド
24,27,64,67,124 ピラー電極
24a 電極部
24b 半田部
25 シード層
26 レジスト
26a 開口部
28 再配線
30,130 樹脂
31 凹部
31a,32a 底面
31b 上端
32 溝
40 ダイボンド材
40a 接着層
50 ワイヤ
65,164 バンプ
70 アンダーフィル材
71 ディスペンサ
80 パッケージ基板
81 導電部
200 金型
210 上型
211 凸部
220 下型
230 リリースフィルム
300 レーザー
Claims (13)
- 第1の基板と、
前記第1の基板を覆う樹脂と、
前記樹脂に設けられた凹部と、
前記第1の基板上に設けられ、前記凹部の底面で前記樹脂から露出した部分を有する突起状の第1の電極と
を含むことを特徴とする半導体装置。 - 前記第1の電極は、
第1の導電体を有する第1の部分と、
前記第1の電極の先端に位置し、前記第1の導電体とは異なる第2の導電体を有する第2の部分と
を含むことを特徴とする請求項1に記載の半導体装置。 - 前記第1の電極の前記露出した部分は、前記第2の部分であり、
前記第1の部分は、前記樹脂で覆われていることを特徴とする請求項2に記載の半導体装置。 - 前記第1の基板上に設けられたパッドと、
一部が前記樹脂内に設けられたリードフレームと、
前記樹脂内に設けられ、一端が前記パッドに接続され、他端が前記リードフレームに接続され、一部が前記凹部の前記底面よりも高い位置にあるワイヤと
を含むことを特徴とする請求項1乃至3のいずれか一項に記載の半導体装置。 - 第2の基板と、
前記第2の基板上に設けられ、前記凹部内で前記第1の電極と接続された第2の電極と
を含むことを特徴とする請求項1乃至4のいずれか一項に記載の半導体装置。 - 前記第2の電極は、突起状であり、
前記凹部内に設けられ、前記第1の電極及び前記第2の電極を覆う絶縁層を含むことを特徴とする請求項5に記載の半導体装置。 - 前記第2の基板は、平面視で前記凹部よりも小さく、
前記第2の基板の、前記第2の電極が設けられた面は、前記樹脂の、前記凹部の上端と前記底面との間に位置することを特徴とする請求項5又は6に記載の半導体装置。 - 第1の基板上に、突起状の第1の電極を形成する工程と、
前記第1の基板を封止し、前記第1の電極の一部が露出する凹部を有する樹脂を形成する工程と
を含むことを特徴とする半導体装置の製造方法。 - 前記樹脂を形成する工程は、
前記樹脂で前記第1の基板及び前記第1の電極を封止する工程と、
前記樹脂を部分的に除去し、前記第1の電極の前記一部が露出する前記凹部を形成する工程と
を含むことを特徴とする請求項8に記載の半導体装置の製造方法。 - 前記第1の電極を形成する工程は、
第1の導電体を有する第1の部分を形成する工程と、
前記第1の部分上に、前記第1の導電体とは異なる第2の導電体を有する第2の部分を形成する工程と
を含むことを特徴する請求項8又は9に記載の半導体装置の製造方法。 - 前記第1の電極の前記一部は、前記第2の部分であり、
前記凹部を有する前記樹脂を形成する工程は、前記第1の部分を前記樹脂で覆う工程を含むことを特徴とする請求項10に記載の半導体装置の製造方法。 - 前記樹脂を形成する工程の前に、
前記第1の基板上にパッドを形成する工程と、
前記第1の基板をリードフレーム上に配置する工程と、
前記リードフレームと前記パッドとをワイヤで接続する工程と
を含み、
前記ワイヤの一部が、前記凹部の底面よりも高い位置にあることを特徴する請求項8乃至11のいずれか一項に記載の半導体装置の製造方法。 - 前記凹部を有する前記樹脂を形成する工程の後に、
前記第1の基板と、表面に第2の電極を有する第2の基板とを対向させる工程と、
前記第1の電極と前記第2の電極とを接続する工程と
を含むことを特徴とする請求項8乃至12のいずれか一項に記載の半導体装置の製造方法。
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