JP2008084263A - メモリカードおよびその製造方法 - Google Patents
メモリカードおよびその製造方法 Download PDFInfo
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Abstract
【解決手段】メモリカード1は、ガラスエポキシ樹脂を主体とした配線基板2と、その主面上に実装された複数枚の半導体チップ(3C、3F)と、配線基板2および半導体チップ(3C、3F)を封止するモールド樹脂4とで構成されている。モールド樹脂4は、石英フィラーが入った熱硬化性エポキシ樹脂からなる。配線基板2の裏面は、モールド樹脂4で覆われておらず、メモリカード1の裏面側に露出している。配線基板2の裏面には、半導体チップ(3C、3F)に電気的に接続された複数の外部接続端子7が形成されている。メモリカード1を携帯電話機のカードスロットに装着すると、カードスロットに内蔵されたコネクタの端子とこれらの外部接続端子7とが接触し、メモリカード1と携帯電話機との間で信号のやり取りや電源の供給が行われる。
【選択図】図4
Description
図1は、本実施の形態のメモリカードの外観(表面側)を示す平面図、図2は、メモリカードの内部構造を示す平面図、図3は、メモリカードの外観(裏面側)を示す平面図、図4は、図1のA−A線に沿った断面図、図5は、図1のB−B線に沿った断面図である。
図20は、配線基板2の主面上に半導体チップ3Fを積層する際に、下層の半導体チップ3Fのワイヤボンディング領域が上層の半導体チップ3Fによって覆われないように、それぞれの半導体チップ3Fをずらして積層した例である。この場合は、前記実施の形態のように、下層の半導体チップ3Fと上層の半導体チップ3Fとの間にダミーチップ(スペーサチップ9)を設ける必要がないので、さらに多くの半導体チップ3Fを実装することができる。
前述の実施の形態1では、配線基板2の平面寸法に対して小さい寸法の半導体チップ3Fを用いた例で説明したが、図21に示すように、配線基板2と同等の平面寸法の半導体チップ3Fを使用することができる。すなわち、従来技術においては、モールド樹脂が配線基板の平面寸法を超えた範囲に形成されることは無かったので、配線基板と同等の平面寸法の半導体チップを用意した場合、半導体チップの端部はモールド樹脂に覆われず、露出してしまう。従って、本実施の形態のような構成を採用することはできなかった。
2 配線基板
3C、3F 半導体チップ
4 モールド樹脂
4a 樹脂バリ
5 ワイヤ
6 チップコンデンサ
7 外部接続端子
8 突起
9 スペーサチップ
10 配線
11 ガイド溝
12 ノッチ溝
13 抜け防止溝
14 フィラー
15 長溝
16 テスト端子
20 大型配線基板
21 吊り部
30 モールド樹脂金型
31 上金型
32 上金型インサートブロック
33 下金型
34 下金型インサートブロック
35 ランナ
36 ゲート
37 キャビティ
38 ラミネートフィルム
39 溝
40 コネクタ
41 端子
50 カード本体
51 配線基板
52 モールド樹脂
Claims (14)
- 配線基板と、
前記配線基板の主面上に積層された複数のメモリチップと、
前記配線基板の裏面に形成され、前記複数のメモリチップと電気的に接続された複数の外部接続端子と、
前記配線基板の主面と前記複数のメモリチップとを封止し、前記配線基板の側面を覆い、かつ前記配線基板の裏面を露出するモールド樹脂とを有するメモリカード。 - 前記メモリチップは、電気的に消去および書き込み可能な不揮発性メモリが形成された半導体チップを含み、
前記配線基板の主面上には、前記不揮発性メモリに対するメモリインタフェース動作を制御するインタフェースコントローラが形成された半導体チップがさらに実装されていることを特徴とする請求項1記載のメモリカード。 - 前記配線基板の主面上には、前記インタフェースコントローラから与えられた動作コマンドに従ってセキュリティー処理を行うセキュリティーコントローラとしてのICカードマイコンが形成された半導体チップがさらに実装されていることを特徴とする請求項2記載のメモリカード。
- カード挿入時に先端部となる前記メモリカードの一辺には、前記先端部の厚さが他の部分よりも薄くなるようなテーパ加工が施されていることを特徴とする請求項1記載のメモリカード。
- 前記配線基板の主面上に実装された前記複数のメモリチップの一部は、その端部が前記配線基板の端部よりも外側にオーバーハングするように実装されていることを特徴とする請求項1記載のメモリカード。
- 前記配線基板の主面上に実装された前記複数のメモリチップは、前記配線基板の面積よりも大きいメモリチップを含むことを特徴とする請求項1記載のメモリカード。
- カード挿入時に後端部となる前記メモリカードの一辺には、逆挿入防止用の突起が形成されていることを特徴とする請求項1記載のメモリカード。
- 前記モールド樹脂の表面粗さは、JIS_B0601:1987規格において、Rmax=10〜15であることを特徴とする請求項1記載のメモリカード。
- 前記配線基板の縦横の寸法は、前記モールド樹脂の縦横の寸法より小さいことを特徴とする請求項1記載のメモリカード。
- 配線基板と、
前記配線基板の主面上に積層された複数のメモリチップと、
前記配線基板の裏面に形成され、前記複数のメモリチップと電気的に接続された複数の外部接続端子と、
前記配線基板の主面と前記複数のメモリチップとを封止するモールド樹脂とを有するメモリカードの製造方法であって、
(a)前記配線基板に必要なパターンを複数ユニット形成した大型配線基板を用意する工程、
(b)前記大型配線基板のそれぞれのユニットに前記複数のメモリチップを実装する工程、
(c)前記工程(b)の後、前記大型配線基板をモールド樹脂金型に装着し、前記モールド樹脂金型に設けられた複数のキャビティに溶融樹脂を注入することによって、前記複数のメモリチップを封止する前記モールド樹脂をユニット単位で成形する工程、
(d)前記工程(c)の後、前記モールド樹脂および前記モールド樹脂によって封止された前記大型配線基板の一部を前記大型配線基板から切断、分離する工程、
を有し、
前記(d)工程後に、前記モールド樹脂は、前記配線基板の側面を覆い、かつ前記配線基板の裏面が露出するように形成されることを特徴とするメモリカードの製造方法。 - 前記大型配線基板のそれぞれのユニットのチップ搭載領域は、吊り部によって前記大型配線基板の他の領域と連結されており、前記チップ搭載領域の周囲には、前記吊り部が形成された領域を除いて空隙が形成されており、
前記工程(c)で前記キャビティに前記溶融樹脂を注入した際、前記溶融樹脂の一部が前記空隙内に充填されることを特徴とする請求項10記載のメモリカードの製造方法。 - 前記モールド樹脂の表面粗さは、JIS_B0601:1987規格において、Rmax=10〜15であることを特徴とする請求項10記載のメモリカードの製造方法。
- 前記工程(c)に先だって、前記キャビティの内壁に、前記モールド樹脂と前記モールド樹脂金型との離型を容易にするための樹脂シートを装着することを特徴とする請求項10記載のメモリカードの製造方法。
- 前記キャビティの内壁の一部にテーパ加工を施すことによって、カード挿入時に先端部となる前記メモリカードの一辺に、前記先端部の厚さが他の部分よりも薄くなるようなテーパを形成することを特徴とする請求項10記載のメモリカードの製造方法。
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TW096125886A TW200822301A (en) | 2006-09-29 | 2007-07-16 | Memory card and manufacturing method of the same |
CNA2007101477554A CN101159038A (zh) | 2006-09-29 | 2007-08-28 | 存储卡及其制造方法 |
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