JP5084015B2 - 発光ダイオードの製造方法 - Google Patents
発光ダイオードの製造方法 Download PDFInfo
- Publication number
- JP5084015B2 JP5084015B2 JP2007128777A JP2007128777A JP5084015B2 JP 5084015 B2 JP5084015 B2 JP 5084015B2 JP 2007128777 A JP2007128777 A JP 2007128777A JP 2007128777 A JP2007128777 A JP 2007128777A JP 5084015 B2 JP5084015 B2 JP 5084015B2
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- Led Device Packages (AREA)
Description
2 回路基板
2a 貫通孔
3 ダイパターン
4a、4b 上面電極パターン
5a、5b 下面電極パターン
6a、6b 側面電極パターン
7 LEDチップ
7a LED素子電極
8 第1のボンディングワイヤー
8a、9a ボール
9 第2のボンディングワイヤー
10 透光性封止樹脂
11 キャピラリー
Claims (2)
- 絶縁性を有する回路基板の上面にLEDチップを搭載するダイパターンと、一対の上下電極パターンと、該上下電極パターンを連通する一対の側面電極パターンとを形成し、前記ダイパターン上に一対の素子電極を備えたLEDチップを固着すると共に、前記上面電極と前記素子電極とをワイヤーボンディング実装し、前記LEDチップとボンディングワイヤーを透光性封止樹脂により封止してなる発光ダイオードの製造方法において、
前記ボンディングワイヤーを1つの前記素子電極から2本出るように配設するため、第1のボンディングワイヤーの先端に第1のボールが形成された状態で、キャピラリーが降下し、前記第1のボールが前記素子電極に接触したときに、熱・荷重・超音波が前記第1のボールに伝わり、前記第1のボンディングワイヤーを接合させる第1の1stボンド工程と、前記第1のボンディングワイヤーの付け根部分を寝かした状態になるよう前記キャピラリーを一定の高さまで上昇させ、前記上面電極のパターン位置まで移動し、前記キャピラリーの軌跡で前記第1のボンディングワイヤーの低ループ形状を決め、前記キャピラリーが降下し、前記第1のボンディングワイヤーを前記上面電極パターン上に押し付け、熱・荷重・超音波を加えて前記第1のボンディングワイヤーを接合させる第1の2ndボンド工程と、その後、前記キャピラリーは上昇し、前記キャピラリーの先端に一定の長さのワイヤーを確保した後、引っ張ることで前記第1の2ndボンド接合部で前記第1のボンディングワイヤーを切断する第1の切断工程と、次に、前記キャピラリーの先端に一定の長さの前記ワイヤーの先端部分に高電圧をかけて火花を飛ばし、その熱で金を溶かし、前記ワイヤーの先端に表面張力により第2のボールを形成し、前記第1のボンディングワイヤーの前記素子電極の第1の1stボンド位置上に重なり合うように第2のボンディングワイヤーを接合する第2の1stボンド工程と、前記第2のボンディングワイヤーの付け根部分を曲げることなく前記キャピラリーを一定の高さまで上昇させ、前記第1と前記第2の2本のボンディングワイヤーは平面的に重なるように方向が同一で長さが異なるよう前記上面電極のパターン位置まで移動し、前記キャピラリーの軌跡で前記ワイヤーの通常ループ形状を決め、前記上面電極のパターン上に押し付け、熱・荷重・超音波を加えて前記第2のボンディングワイヤーを接合させる第2の2ndボンド工程と、その後、前記キャピラリーは上昇し、前記キャピラリーの先端に一定の長さの前記ワイヤーを確保した後、引っ張ることで前記第2の2ndボンド接合部で前記第2のボンディングワイヤーを切断する第2の切断工程と、よりなることを特徴とする発光ダイオードの製造方法。 - 絶縁性を有する回路基板の上面にLEDチップを搭載するダイパターンと、一対の上下電極パターンと、該上下電極パターンを連通する一対の側面電極パターンとを形成し、前記ダイパターン上に一対の素子電極を備えたLEDチップを固着すると共に、前記上面電極と前記素子電極とをワイヤーボンディング実装し、前記LEDチップとボンディングワイヤーを透光性封止樹脂により封止してなる発光ダイオードの製造方法において、
前記ボンディングワイヤーを1つの前記素子電極から2本出るように配設するため、第1のボンディングワイヤーの先端に第1のボールが形成された状態で、キャピラリーが降下し、前記第1のボールが前記素子電極に接触したときに、熱・荷重・超音波が前記第1のボールに伝わり、前記第1のボンディングワイヤーを接合させる第1の1stボンド工程と、前記第1のボンディングワイヤーの付け根部分を寝かした状態になるよう前記キャピラリーを一定の高さまで上昇させ、前記上面電極のパターン位置まで移動し、前記キャピラリーの軌跡で前記第1のボンディングワイヤーの低ループ形状を決め、前記キャピラリーが降下し、前記第1のボンディングワイヤーを前記上面電極パターン上に押し付け、熱・荷重・超音波を加えて前記第1のボンディングワイヤーを接合させる第1の2ndボンド工程と、その後、前記キャピラリーは上昇し、前記キャピラリーの先端に一定の長さのワイヤーを確保した後、引っ張ることで前記第1の2ndボンド接合部で前記第1のボンディングワイヤーを切断する第1の切断工程と、次に、前記キャピラリーの先端に一定の長さの前記ワイヤーの先端部分に高電圧をかけて火花を飛ばし、その熱で金を溶かし、前記ワイヤーの先端に表面張力により第2のボールを形成し、前記第1のボンディングワイヤーの前記素子電極の第1の1stボンド位置上に重なり合うように第2のボンディングワイヤーを接合する第2の1stボンド工程と、前記第2のボンディングワイヤーの付け根部分を曲げることなく前記キャピラリーを一定の高さまで上昇させ、前記第1と前記第2の2本のボンディングワイヤーは平面的に見て長さが同じで方向がずれているように前記上面電極のパターン位置まで移動し、前記キャピラリーの軌跡で前記ワイヤーの通常ループ形状を決め、前記上面電極のパターン上に押し付け、熱・荷重・超音波を加えて前記第2のボンディングワイヤーを接合させる第2の2ndボンド工程と、その後、前記キャピラリーは上昇し、前記キャピラリーの先端に一定の長さの前記ワイヤーを確保した後、引っ張ることで前記第2の2ndボンド接合部で前記第2のボンディングワイヤーを切断する第2の切断工程と、よりなることを特徴とする発光ダイオードの製造方法。
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