JP2006313817A - 多波長の発光ダイオード構造及びその製造工程 - Google Patents
多波長の発光ダイオード構造及びその製造工程 Download PDFInfo
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Abstract
程を提供する。
【解決手段】本発明は、各々発光チップの底層及び周辺より上の部位に対応して、少なく
とも一種の既定波長を具えた蛍光材を覆い、発光チップに通電すると、その底層及び周辺
より上の部位の蛍光材を励起して高い発光効率及び予定した出色光を形成する。この出色
光波発光チップが、その底層部位の蛍光材及び周辺より上の部位の蛍光材を励起する。そ
のため、相互干渉現象を防止して、多波長の発光ダイオードの品質を有利に把握できる。
【選択図】図3
Description
また、図2に示す蛍光樹脂に二種の蛍光粉を混合した多波長発光ダイオード構造は、一般に青色チップを使用して蛍光樹脂50内で混合した赤色蛍光粉52及び緑色蛍光粉53を励起し、赤と緑の二色と発光チップ10の青色が結合し、三原色光混合効果を生み出し、白色に近い光の色を呈す。
しかしながら、この種の多波長発光ダイオードは、蛍光粉の分量が異なり、比例をコントロールするのが難しいため、出来上がりの品質を均一にできない。更に異なる蛍光粉は同じ部位に於いて、発光チップの光源励起によって干渉現象を発生する。即ち波長が比較的短い蛍光粉のエネルギーは、波長が比較的長い蛍光粉の吸収消耗によって一部が励起され、且つその消耗率を予測する事ができないため、予期しない色の偏りが発生する。同様に予定した光色を正確に出す事ができない。更に波長が短い蛍光粉は、発光チップに励起されると、波長が僅かに長くなり、僅かに長くなった波長光波は、白色光を発生する他に、
波長が更に長くなった蛍光粉を発射して励起し、発光効率を下げる。そのため、発光輝度が低くなってしまう。
20 キヤリア
21 電極端子
30 金線
40 チップ固定樹脂
50 蛍光樹脂
51 黄色蛍光粉
52 赤色蛍光粉
53 緑色蛍光粉
61 第一種蛍光材
62 第二種蛍光材
63 第三種蛍光材
Claims (12)
- 多波長の発光ダイオードは、発光チップの底層部位に波長の長い第一種蛍光材を覆い、また発光チップ周辺より上の部位には波長の短い第二種蛍光材を設置することを特徴とする多波長の発光ダイオード構造。
- 前記発光チップは、青色チップであり、その底層部位には赤色蛍光材を設置し、周辺より上の部位には緑色蛍光材を設置することを特徴とする請求項1記載の多波長の発光ダイオード構造。
- 多波長の発光ダイオードの製造工程は、下述のとおりで、
a.波長の長い第一種蛍光材と樹脂体を混合してチップ固定樹脂とし、その蛍光樹脂で発光チップを覆ってキャリア内に置き、
b.発光チップを上述のチップ固定樹脂内で固定し、チップ固定樹脂を焼き合わせ、
c.発光チップと電極端子を繋ぎ、
d.波長の短い第二種蛍光材と樹脂体を混合して蛍光樹脂とし、その蛍光樹脂を発光チップの周辺より上部位に注ぎ、
e.最後に蛍光樹脂を焼き合わせて多波長の発光ダイオードの製造工程が完成することを特徴とする多波長の発光ダイオードの製造工程。 - 多波長の発光ダイオードは、発光チップの底層部位に波長の長い第一種蛍光材を設置し、発光チップの周辺より上の部位には波長の短い第二、第三蛍光材で覆うことを特徴とする多波長の発光ダイオード構造。
- 前記第三蛍光材は、波長が第一、第二種蛍光材の間を橋架けすることを特徴とする請求項4記載の多波長の発光ダイオード構造。
- 前記発光チップは、青色チップで、底層部位は赤色蛍光材を設置し、周辺より上の部位は緑色蛍光材及び黄色蛍光材で覆うことを特徴とする請求項4記載の多波長の発光ダイオード構造。
- 多波長の発光ダイオードの製造工程は、下述のとおりで、
a.波長の長い第一種蛍光材と樹脂体を混合してチップ固定樹脂とし、その蛍光樹脂で発光チップを覆ってキャリア内に置き、
b.発光チップを上述のチップ固定樹脂内で固定し、チップ固定樹脂を焼き合わせ、
c.発光チップと電極端子を繋ぎ、
d.波長の短い第二、第三種蛍光材と樹脂体を混合して蛍光樹脂とし、その蛍光樹脂を発光チップの周辺より上部位に注ぎ、
e.最後に蛍光樹脂を焼き合わせて多波長の発光ダイオードの製造工程が完成することを特徴とする多波長の発光ダイオードの製造工程。 - 多波長の発光ダイオードは、発光チップの底層部位に波長の長い第一、第二種蛍光材を設置し、発光チップの周辺より上の部位は波長の短い第三種蛍光材で覆うことを特徴とする多波長の発光ダイオード構造。
- 前記第二種蛍光材は、第一、第三種蛍光材の間を橋架けすることを特徴とする請求項8記載の多波長の発光ダイオード構造。
- 前記発光チップは、青色チップで、その発光チップの底層に赤色蛍光材及び黄色蛍光材を設置し、発光チップの周辺より上の部位は緑色蛍光材で覆うことを特徴とする請求項8記載の多波長の発光ダイオード構造。
- 多波長の発光ダイオードの製造工程は、下述のとおりで、
a.波長の長い第一種蛍光材及び第二種蛍光材を各々樹脂体と混合して樹脂餅を作り、
b.第一種蛍光材及び第二種蛍光材によって作られた樹脂餅を発光チップのキャリア内に置き、その上に発光チップを置き、焼き合わせて固定し、
c.発光チップと電極端子を繋ぎ、
d.波長の短い第三種蛍光材と樹脂体を混合して蛍光樹脂とし、その蛍光樹脂を発光チップの周辺より上部位に注ぎ、
e.最後に蛍光樹脂を焼き合わせて多波長の発光ダイオードの製造工程が完成することを特徴とする多波長の発光ダイオードの製造工程。 - 多波長の発光ダイオードの製造工程は、下述のとおりで、
a.波長の長い第一種蛍光材及び第二種蛍光材を各々樹脂体と混合して樹脂餅を作り、
b.第一種蛍光材及び第二種蛍光材によって作られた樹脂餅とチップを焼き合わせて固定し、半製品を作り、
c.上述の半製品を発光チップのキャリア内に置き、焼き合わせて固定し、
d.発光チップと電極端子を繋ぎ、
e.波長の短い第三種蛍光材と樹脂体を混合して蛍光樹脂とし、その蛍光樹脂を発光チップの周辺より上部位に注ぎ、
f.最後に蛍光樹脂を焼き合わせて多波長の発光ダイオードの製造工程が完成することを特徴とする多波長の発光ダイオードの製造工程。
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