JP2011176271A - Ledパッケージ及びその製造方法 - Google Patents
Ledパッケージ及びその製造方法 Download PDFInfo
- Publication number
- JP2011176271A JP2011176271A JP2010186505A JP2010186505A JP2011176271A JP 2011176271 A JP2011176271 A JP 2011176271A JP 2010186505 A JP2010186505 A JP 2010186505A JP 2010186505 A JP2010186505 A JP 2010186505A JP 2011176271 A JP2011176271 A JP 2011176271A
- Authority
- JP
- Japan
- Prior art keywords
- lead frame
- led package
- resin body
- led
- led chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 7
- 229910052738 indium Inorganic materials 0.000 claims abstract description 7
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims abstract description 7
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- 229910000679 solder Inorganic materials 0.000 description 25
- 239000010949 copper Substances 0.000 description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 18
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- 238000000605 extraction Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
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- 230000015572 biosynthetic process Effects 0.000 description 1
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Images
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Abstract
【解決手段】実施形態に係るLEDパッケージは、相互に離隔した第1及び第2のリードフレームと、LEDチップと、樹脂体と、を備える。前記LEDチップは、前記第1及び第2のリードフレームの上方に設けられており、少なくともインジウム、ガリウム及びアルミニウムを含有する半導体層を有する。前記LEDチップの一方の端子は前記第1のリードフレームに接続され、他方の端子は前記第2のリードフレームに接続されている。前記樹脂体は、前記第1及び第2のリードフレームのそれぞれの上面全体、下面の一部及び端面の一部を覆い、前記LEDチップを覆い、前記下面の残部及び前記端面の残部を露出させている。そして、前記樹脂体の外形が前記LEDパッケージの外形をなす。
【選択図】図1
Description
先ず、本発明の第1の実施形態について説明する。
図1は、本実施形態に係るLEDパッケージを例示する斜視図であり、
図2(a)は、本実施形態に係るLEDパッケージを例示する断面図であり、(b)は、リードフレームを例示する平面図である。
本実施形態に係るLEDパッケージは、InGaAlP層を含むLEDチップを、エポキシ樹脂、アクリル樹脂又はウレタン樹脂からなる透明樹脂体によって封止したパッケージである。
図3は、本実施形態に係るLEDパッケージの製造方法を例示するフローチャート図であり、
図4(a)〜(d)、図5(a)〜(c)、図6(a)及び(b)は、本実施形態に係るLEDパッケージの製造方法を例示する工程断面図であり、
図7(a)は、本実施形態におけるリードフレームシートを例示する平面図であり、(b)は、このリードフレームシートの素子領域を例示する一部拡大平面図である。
本実施形態に係るLEDパッケージ1においては、LEDチップ14が、活性層として、インジウム、ガリウム、アルミニウム及びリンを含有する半導体層が設けられたチップであり、緑色から赤色までの波長領域の光を出射する。緑色から赤色までの波長領域の光は、紫外線及び青色の光と比較してエネルギーが低く、透明樹脂体17を形成する樹脂材料に与える損傷が少ない。このため、本実施形態に係るLEDパッケージ1は、透明樹脂体17の劣化が進行しにくく、耐久性が高い。従って、本実施形態に係るLEDパッケージ1は寿命が長く、信頼性が高く、幅広い用途に適用可能である。
本変形例は、リードフレームシートの形成方法の変形例である。
すなわち、本変形例においては、図4(a)に示すリードフレームシートの形成方法が、前述の第1の実施形態と異なっている。
図8(a)〜(h)は、本変形例におけるリードフレームシートの形成方法を例示する工程断面図である。
図9は、本実施形態に係るLEDパッケージを例示する斜視図であり、
図10は、本実施形態に係るLEDパッケージを例示する側面図である。
図11は、本実施形態に係るLEDパッケージを例示する斜視図であり、
図12は、本実施形態に係るLEDパッケージを例示する断面図である。
図13は、本実施形態に係るLEDパッケージを例示する斜視図であり、
図14は、本実施形態に係るLEDパッケージを例示する断面図である。
図15は、本実施形態に係るLEDパッケージを例示する斜視図であり、
図16(a)は本実施形態に係るLEDパッケージを例示する平面図であり、(b)はその側面図である。
図15並びに図16(a)及び(b)に示すように、本実施形態に係るLEDパッケージ5は、前述の第1の実施形態に係るLEDパッケージ1(図1参照)と比較して、リードフレームの形状が異なっていると共に、LEDチップのタイプが異なっている。
図16(a)及び(b)に示すように、本実施形態に係るLEDパッケージ5は、実装基板120に実装されて使用される。実装に際しては、実装基板120の実装面121における相互に離隔した2ヶ所の矩形の領域に、半田フィレット125及び126を形成する。次に、LEDパッケージ5を実装面121上に載置する。このとき、リードフレーム41の凸部41hの下面を半田フィレット125に当接させ、リードフレーム42の凸部42hの下面を半田フィレット126に当接させる。そして、+Z方向から見て、切込41iを除く凸部41hの外縁を半田フィレット125の外縁と一致させ、切込42iを除く凸部42hの外縁を半田フィレット126の外縁と一致させる。次に、熱処理を行い、半田フィレット125及び126を一旦溶融させた後、凝固させる。これにより、リードフレーム41が半田フィレット125を介して実装基板120に接合されると共に、リードフレーム42が半田フィレット126を介して実装基板120に接合される。この結果、LEDパッケージ5が実装基板120に実装される。
図17は、本実施形態に係るLEDパッケージを例示する斜視図である。
図17に示すように、本実施形態に係るLEDパッケージ6は、前述の第5の実施形態に係るLEDパッケージ5(図15参照)と比較して、LEDチップが搭載されたリードフレームの形状が異なっている。
図18は、本実施形態に係るLEDパッケージを例示する斜視図であり、
図19(a)は本実施形態に係るLEDパッケージを例示する平面図であり、(b)はその側面図である。
図18並びに図19(a)及び(b)に示すように、本実施形態に係るLEDパッケージ7は、前述の第5の実施形態に係るLEDパッケージ5(図15参照)と比較して、LEDチップが搭載されたリードフレームの形状が異なっている。
図20は、本実施形態に係るLEDパッケージを例示する斜視図であり、
図21は、本実施形態に係るLEDパッケージを例示する断面図である。
図22は、本実施形態に係るLEDパッケージを例示する斜視図である。
図22に示すように、本実施形態は、前述の第1の実施形態と第5の実施形態とを組み合わせた例である。すなわち、本実施形態に係るLEDパッケージ9においては、前述の第1の実施形態(図1参照)において説明したリードフレーム11及び12が設けられている。そして、このリードフレーム11上に、前述の第5の実施形態(図15参照)において説明した上下導通タイプのLEDチップ44が搭載されている。LEDチップ44の下面端子はダイマウント材43を介してリードフレーム11に接続されており、LEDチップ44の上面端子44aはワイヤ45を介してリードフレーム12に接続されている。
図23は、本実施形態に係るLEDパッケージを例示する断面図である。
図23に示すように、本実施形態に係るLEDパッケージ10においては、前述の第5の実施形態に係るLEDパッケージ5(図15参照)の構成に加えて、透明樹脂体17上にレンズ71が設けられている。レンズ71は、透明樹脂からなり、凸面が上方に向いた平凸レンズである。レンズ71は、例えば下金型101(図5参照)の底面に凹部を形成することにより透明樹脂体17と一体的に形成してもよく、透明樹脂板29(図6参照)を形成後に透明樹脂板29に取り付けて、その後、透明樹脂板29をダイシングしてもよく、透明樹脂板29をダイシングした後に透明樹脂体17に取り付けてもよい。本実施形態によれば、透明樹脂体17から出射した光をレンズ71によって直上方向(+Z方向)に集光させることができるため、配向性が向上する。本実施形態における上記以外の構成、製造方法及び作用効果は、前述の第5の実施形態と同様である。
Claims (15)
- 相互に離隔した第1及び第2のリードフレームと、
前記第1及び第2のリードフレームの上方に設けられ、少なくともインジウム、ガリウム及びアルミニウムを含有する半導体層を有し、一方の端子が前記第1のリードフレームに接続され、他方の端子が前記第2のリードフレームに接続されたLEDチップと、
前記第1及び第2のリードフレームのそれぞれの上面全体、下面の一部及び端面の一部を覆い、前記LEDチップを覆い、前記下面の残部及び前記端面の残部を露出させた樹脂体と、
を備え、
前記樹脂体の外形がその外形をなすことを特徴とするLEDパッケージ。 - 前記樹脂体は、エポキシ樹脂、アクリル樹脂及びウレタン樹脂からなる群から選択された1種以上の樹脂により形成されていることを特徴とする請求項1記載のLEDパッケージ。
- 前記第1のリードフレームの上面には凹部が形成されており、前記LEDチップは前記凹部の内部に搭載されていることを特徴とする請求項1または2に記載のLEDパッケージ。
- 前記第1のリードフレームの下面及び前記第2のリードフレームの下面にはそれぞれ凸部が形成されており、
前記凸部の下面は前記樹脂体の下面において露出し、前記凸部の側面は前記樹脂体によって覆われていることを特徴とする請求項1〜3のいずれか1つに記載のLEDパッケージ。 - 前記第1のリードフレームの前記凸部の下面は前記第2のリードフレームの前記凸部の下面と同じ形状であることを特徴とする請求項4記載のLEDパッケージ。
- 前記凸部は、前記第1及び第2のリードフレームにおける相互に対向する端縁から離隔した領域に形成されていることを特徴とする請求項4または5に記載のLEDパッケージ。
- 前記LEDチップは前記第1のリードフレームに搭載されており、
前記一方の端子は前記LEDチップの下面に設けられており、前記他方の端子は前記LEDチップの上面に設けられており、
導電性材料からなり、前記LEDチップを前記第1のリードフレームに固着させると共に、前記一方の端子を前記第1のリードフレームに接続するダイマウント材と、
前記他方の端子を前記第2のリードフレームに接続するワイヤと、
をさらに備えたことを特徴とする請求項1〜6のいずれか1つに記載のLEDパッケージ。 - 前記第1のリードフレームの上面と前記他方の端子から前記ワイヤが引き出される方向とのなす角度は、前記第2のリードフレームの上面と前記第2のリードフレームから前記ワイヤが引き出される方向とのなす角度よりも小さいことを特徴とする請求項7記載のLEDパッケージ。
- 前記樹脂体上に設けられたレンズをさらに備えたことを特徴とする請求項1〜8のいずれか1つに記載のLEDパッケージ。
- 前記第1のリードフレーム及び前記第2のリードフレームのうちの少なくとも一方は、
端面が前記樹脂体によって覆われたベース部と、
前記ベース部から相互に異なる方向に延出し、その下面が前記樹脂体によって覆われ、その先端面が前記樹脂体の側面に露出した複数本の吊ピンと、
を有することを特徴とする請求項1〜9のいずれか1つに記載のLEDパッケージ。 - 上方から見て、前記樹脂体の形状は矩形であり、
前記第1のリードフレーム及び前記第2のリードフレームのうちの少なくとも一方は、
端面が前記樹脂体によって覆われたベース部と、
前記ベース部から延出し、その下面が前記樹脂体によって覆われ、その先端面が前記樹脂体の3つの側面に露出した複数本の吊ピンと、
を有することを特徴とする請求項1〜9のいずれか1つに記載のLEDパッケージ。 - 前記第1又は第2のリードフレームにおける下面が前記樹脂体から露出した部分には、上下方向に貫通した切込が形成されていることを特徴とする請求項1〜11のいずれか1つに記載のLEDパッケージ。
- 導電性材料からなる導電シートから前記導電性材料を選択的に除去することにより、複数の素子領域がマトリクス状に配列され、各前記素子領域においては相互に離隔した第1及び第2のリードフレームを含む基本パターンが形成され、前記素子領域間のダイシング領域においては前記導電性材料が隣り合う前記素子領域間をつなぐように残留したリードフレームシート上に、前記素子領域毎に、少なくともインジウム、ガリウム及びアルミニウムを含有する半導体層が設けられたLEDチップを搭載すると共に、前記LEDチップの一方の端子を前記第1のリードフレームに接続し、他方の端子を前記第2のリードフレームに接続する工程と、
前記リードフレームシートの前記素子領域における上面全体及び下面の一部を覆い、前記LEDチップを埋め込む樹脂板を形成する工程と、
前記リードフレームシート及び前記樹脂板における前記ダイシング領域に配置された部分を除去することにより、前記リードフレームシート及び前記樹脂板における前記素子領域に配置された部分を個片化する工程と、
を備え、
前記個片化された部分の外形をその外形とすることを特徴とするLEDパッケージの製造方法。 - 前記樹脂板を、エポキシ樹脂、アクリル樹脂及びウレタン樹脂からなる群から選択された1種以上の樹脂により形成することを特徴とする請求項13記載のLEDパッケージの製造方法。
- 前記接続する工程は、
前記第1のリードフレームの上面に前記LEDチップを接合する工程と、
ワイヤの一端を前記第2のリードフレームの上面に接合する工程と、
前記一端を前記第2のリードフレームの上面に接合した後、前記ワイヤの他端を前記一方の端子に接合する工程と、
を有することを特徴とする請求項13または14に記載のLEDパッケージの製造方法。
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US12/886,890 US8637892B2 (en) | 2010-01-29 | 2010-09-21 | LED package and method for manufacturing same |
TW100101959A TWI446596B (zh) | 2010-01-29 | 2011-01-19 | 發光二極體(led)封裝及其製造方法 |
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US20110186902A1 (en) | 2011-08-04 |
CN102142513B (zh) | 2014-07-16 |
US8637892B2 (en) | 2014-01-28 |
TWI446596B (zh) | 2014-07-21 |
TW201145616A (en) | 2011-12-16 |
CN102142513A (zh) | 2011-08-03 |
JP5383611B2 (ja) | 2014-01-08 |
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