JP2011129876A - 発光装置およびその製造方法 - Google Patents
発光装置およびその製造方法 Download PDFInfo
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- JP2011129876A JP2011129876A JP2010212382A JP2010212382A JP2011129876A JP 2011129876 A JP2011129876 A JP 2011129876A JP 2010212382 A JP2010212382 A JP 2010212382A JP 2010212382 A JP2010212382 A JP 2010212382A JP 2011129876 A JP2011129876 A JP 2011129876A
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- light emitting
- reflector
- metal substrate
- slit
- resin
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Abstract
【解決手段】金属基板20に、発光素子部形成領域22を横断するスリット24を形成する工程において、スリット24と交差するように樹脂溜まり用の凹部21を形成する。次いで、スリット24に絶縁材料を充填するとともに、前記凹部21に樹脂を充填し、硬化させる。その後、発光素子部形成領域22に発光素子部を形成し、1ないし複数の発光素子部を単位として、切断し、パターンが形成されたプリント基板に実装する。
【選択図】図3
Description
特許文献4に記載された技術では、金属薄板の両端をコの字状に折り曲げて強度を確保するとともに、スリットを絶縁性のマスキングテープで接続している。
金属基板に、発光素子部形成領域を横断するスリットを形成する工程(1)と、前記スリットに絶縁材料を充填する工程(2)と、前記発光素子部形成領域に発光素子部を形成する工程(3)と、前記発光素子部が形成された金属基板を、1ないし複数の発光素子部を単位として、切断する工程(4)とを含み、前記工程(1)において、前記金属基板の、前記発光素子部形成領域の直下を除く領域に、前記スリットと交差するように樹脂溜まり用の凹部を形成し、前記工程(2)において、前記凹部に樹脂を充填することを特徴とする発光装置の製造方法。
金属基板に、発光素子部形成領域および当該発光素子部形成領域を横断するスリットを形成する工程(1)と、前記発光素子部形成領域に発光素子部を形成する工程(2)と、前記スリットに絶縁材料を充填する工程(3)と、前記発光素子部が形成された金属基板を、1ないし複数の発光素子部を単位として、切断する工程(4)とを含み、前記工程(1)において形成される前記発光素子部形成領域は、リフレクタ用凹部と当該リフレクタ用凹部の底面より突出した凸部とを有し、前記工程(1)において、前記金属基板の、前記発光素子部形成領域の厚み方向直下を除く領域に、前記スリットと交差するように樹脂溜まり用凹部を形成し、前記工程(3)において、前記凸部を除くリフレクタ用凹部の底部と前記樹脂溜まり用凹部に樹脂を充填することを特徴とする発光装置の製造方法。
本発明の発光装置の製造方法において、前記発光素子部形成領域が存在する面を表面とするとき、前記樹脂溜まり用の凹部は、前記金属基板の表面側に形成してもよいし、裏面側に形成してもよい。或いは表面および裏面の両方に形成してもよい。表面および/または裏面に形成される樹脂溜まり用の凹部は、貫通孔により金属基板を貫通するものであってもよい。
なお本発明において、凹部に充填される「樹脂」とは、樹脂組成物を含む広義の樹脂を意味する。
<第一の実施の形態>
図1は、第一の実施の形態による発光装置の製造方法の手順を示す図、図2〜図8は、製造方法の各工程における発光装置(製造途中の部品の状態を含む)を示す図である。
リフレクタ部22の深さは、LED素子の厚みより大きく、リフレクタ部22に樹脂等を充填したときにも、LED素子の電気的接続に用いられるワイヤが上部から飛び出さない程度とする。具体的には、例えば、金属基板20の厚みが1mm程度として、0.4mm以上とする。
スリット24によって分断される金属基板20を、最終の切断工程まで一体化しておくために、図2に示すように、スリット24は金属基板20の端部までは達しておらず、金属基板20の端部には、スリット24が形成されていない縁部20aが形成される。この縁部20aを最終的に切り離すために、スリット24の両端にはそれぞれミシン目スリット28が形成される。
また樹脂溜まりは、各発光素子部を切り離す分割部分(V溝)を避けて形成されているので、分割工程においてLED素子やワイヤにかかる応力を低減させるとともに、ダイシングによるゴミの発生を抑えることができる。
本実施の形態は、第一の実施形態とは、凹部21の形状が異なる。それ以外の構成および製造の各工程(S101〜S105)は第一の実施形態と同様であるので説明を省略する。
本実施の形態は、第一および第二の実施の形態とは、凹部21を形成する位置が異なる。それ以外の構成および製造の各工程(S101〜S105)は第一の実施の形態と同様であるので説明を省略する。
図10に示すように、本実施の形態では、金属基板加工工程(S101)で、金属基板20のリフレクタ部22が形成された面に、各リフレクタ部の両側にスリット24を横切るように凹部21を形成し、工程(S102)で凹部21に樹脂を充填し樹脂溜まりとする。凹部21の深さは、接着性を向上させるために0.1mm以上であることが好ましく、放熱性を高く保つためには、リフレクタ部の深さ以下であることが好ましい。また、本実施形態では、LED素子が搭載される面の反射性を高く保つために、凹部21に充填される樹脂として二酸化チタン等の白色顔料を含む反射率の高い材料を用いる。なお図では、凹部21の形状は第一実施形態と同様に略直方体の形状としているが、これに限定されず、例えば第二の実施形態と同様のX型としてもよいし、スリット24に直交するV溝26がない場合には、隣り合う2つの凹部21を一体化し一つの凹部としてもよい。
本実施の形態は、第一〜第三の実施の形態の強度の向上を図った変更例である。それ以外の構成は第一の実施の形態と同様であるので説明を省略する。
なお図11〜図13では、第一の実施形態と同じ形状の凹部21を示したが、凹部21の形状を適宜変更できることは第三の実施の形態と同様である。
第一〜第六の実施形態では、凹部21をリフレクタ部22とは別に設け、これを樹脂溜まりとして利用したものであるが、以下説明する実施の形態ではリフレクタ部自体を樹脂溜まりとして利用する。製造工程は、図1に示す第一の実施形態の製造工程と同じであるが、金属基板加工工程(S101)では、リフレクタ部22、スリット24、V溝26、およびミシン目スリット28が形成される。第一〜第六の実施形態の凹部21に相当する凹部は設けてなくてもよい。また樹脂充填工程(S102)では、工程(S101)で形成された複数のリフレクタ部22のうち、一部のみに樹脂を充填して樹脂溜まりとし、発光素子部形成工程(S103)では樹脂を充填しなかったリフレクタ部にLED素子をダイボンディングして発光素子部を形成する。
このように第七及び第八の実施の形態は、発光素子のピッチが異なる発光装置やリフレクタ形状の異なる発光装置など多種・多様な発光装置を一つの金属基板から形成する場合に適している。
以上説明した第一〜第八の実施形態では、リフレクタ部を金属基板に形成した場合を説明したが、本発明は、リフレクタ部(逆円錐台形の窪み)を金属基板に形成しない場合にも適用することができる。このような実施形態を図16に示す。本実施形態では、金属基板加工工程S101において、V溝26およびミシン目スリット(不図示)が形成されるとともに、V溝26で囲まれる発光素子形成領域(工程(S103)でLED素子が固定される位置)に対して、それを横断するスリット24と、樹脂溜まりとなる凹部21が形成される。凹部21は、スリット24と交差する位置であって、基板表面或いは裏面に形成される。
リフレクタは、必要に応じて、別途作製したものを分割工程(S104)の後で接着するようにしてもよいし、切り離し工程に先立って、V溝26を避けて形成してもよい。これによりリフレクタを構成する樹脂の削りゴミの発生を防止できる。
本実施形態の発光装置の製造方法は、第一〜第九の実施形態の製造方法では、スリット及び樹脂溜まり用凹部に樹脂を充填した後、LED素子を搭載したのに対し、金属基板にLED素子搭載用凸部のあるリフレクタ部を作成し、この凸部にLED素子を搭載した後、スリット、樹脂溜まり用凹部およびリフレクタ部の底部に樹脂を充填する点が特徴である。本実施形態の製造方法において用いる材料、具体的には金属基板用金属、LED素子、充填用樹脂、蛍光体入り樹脂については、特記しない限り、上述した材料と同様である。
上記構成のリフレクタ部62は、図18に示すように、金属基板60の長方形表面に、直交する2方向に沿って所定の間隔で複数形成される。図示する例では、横4列縦4列のリフレクタ部が形成されているが、リフレクタ部の数(列数)はこれに限定されない。
なお図示する例ではリフレクタ部は円錐台を上下反転した形状としているが、リフレクタ部の形状は、この形状に限らず円筒状であってもよい。
本実施形態は、上述した各実施形態における絶縁性樹脂充填工程、具体的にはスリットへの樹脂充填工程の改善に関するものであり、そのための冶具に関する。従って、本実施形態は、上述した第一〜第十のすべての実施形態に適用することができる。
金属基板として、厚み0.7mm、12.0mm×10.0mmのAl板を用意し、その中央に長手方向に沿って、幅0.7mmのスリットを形成し、シリコーン樹脂(信越化学工業社製:LPS-8433W-2)を注入、硬化した。これを比較例の試料とした。
比較例の試料と同じAl板を用意し、その中央に長手方向に沿って、幅0.7mmのスリットを形成するとともに、スリットの両端部に、スリットに直交して、幅1.5mm、長さ6.0mm、深さ0.3mmの凹部をそれぞれ形成し、スリットと凹部に比較例と同じシリコーン樹脂を注入、硬化した。これを実施例1の試料とした。
また中央に円筒状凹部を設けた場合には、さらに接合強度が向上した。
Claims (13)
- 金属基板に、発光素子部形成領域を横断するスリットを形成する工程(1)と、前記スリットに絶縁材料を充填する工程(2)と、前記発光素子部形成領域に発光素子部を形成する工程(3)と、前記発光素子部が形成された金属基板を、1ないし複数の発光素子部を単位として、切断する工程(4)とを含み、
前記工程(1)において、前記金属基板の、前記発光素子部形成領域の厚み方向直下を除く領域に、前記スリットと交差するように樹脂溜まり用の凹部を形成し、前記工程(2)において、前記凹部に樹脂を充填することを特徴とする発光装置の製造方法。 - 金属基板に、発光素子部形成領域および当該発光素子部形成領域を横断するスリットを形成する工程(1)と、前記発光素子部形成領域に発光素子部を形成する工程(2)と、前記スリットに絶縁材料を充填する工程(3)と、前記発光素子部が形成された金属基板を、1ないし複数の発光素子部を単位として、切断する工程(4)とを含み、
前記工程(1)において形成される前記発光素子部形成領域は、リフレクタ用凹部と当該リフレクタ用凹部の底面より突出した凸部とを有し、
前記工程(1)において、前記金属基板の、前記発光素子部形成領域の厚み方向直下を除く領域に、前記スリットと交差するように樹脂溜まり用凹部を形成し、
前記工程(3)において、前記凸部を除くリフレクタ用凹部の底部と前記樹脂溜まり用凹部に樹脂を充填することを特徴とする発光装置の製造方法。 - 請求項1に記載の発光装置の製造方法であって、
前記工程(1)は、前記金属基板の発光素子部形成領域にリフレクタ部を形成する工程を含むことを特徴とする発光装置の製造方法。 - 請求項2に記載の発光装置の製造方法であって、
前記工程(3)は、リフレクタ用凹部の底部と樹脂溜まり用凹部に樹脂を充填した後、前記リフレクタ用凹部に波長変換材料を含む樹脂を充填する工程を含むことを特徴とする発光装置の製造方法。 - 請求項1ないし4いずれか1項に記載の発光装置の製造方法であって、
前記凹部に充填される樹脂は、前記スリットに充填される絶縁材料と同材料であることを特徴とする発光装置の製造方法。 - 請求項1ないし5いずれか1項に記載の発光装置の製造方法であって、
前記凹部は、前記金属基板の、前記発光素子部形成領域が存在する面を表面とするとき、表面側に形成されることを特徴とする発光装置の製造方法。 - 請求項2ないし6のいずれか1項に記載の発光装置の製造方法であって、
前記リフレクタ部は複数形成され、前記複数のリフレクタ部のうち一部のリフレクタ部が前記樹脂溜まり用の凹部を兼ねることを特徴とする発光装置の製造方法。 - 請求項7に記載の発光装置の製造方法であって、
前記工程(1)において、形状の異なる複数種のリフレクタ部を形成し、そのうち、同種のリフレクタ部に発光素子を接続し、それ以外のリフレクタ部を前記樹脂溜まり用の凹部とすること特徴とする発光装置の製造方法。 - 請求項1ないし5いずれか1項に記載の発光装置の製造方法であって、
前記凹部は、前記金属基板の、前記発光素子部形成領域が存在する面を表面とするとき、裏面側に形成されることを特徴とする発光装置の製造方法。 - 請求項1又は2に記載の発光装置の製造方法であって、
前記スリットに絶縁材料を充填する工程は、前記金属基板と同じかそれより大きいサイズの冶具であって、前記スリットに対応する位置に離型性の凸部が形成された冶具を、前記凸部が前記スリットの底部を封止するように前記金属基板に密着した後、前記スリットに絶縁材料を充填することを特徴とする発光装置の製造方法。 - リフレクタ部および前記リフレクタ部を横断し絶縁材料が充填されたスリットを備えた金属基板と、前記金属基板のリフレクタ部に接続された発光素子とを備えた発光装置であって、
前記金属基板の、前記リフレクタ部が形成された領域の厚み方向直下を除く領域に、前記スリットと交差して、樹脂が充填された凹部を有することを特徴とする発光装置。 - リフレクタ部および前記リフレクタ部を横断し絶縁材料が充填されたスリットを備えた金属基板と、前記金属基板のリフレクタ部に接続された発光素子とを備えた発光装置であって、
前記リフレクタ部は、その底面から突出した発光素子搭載用凸部を備え、
前記金属基板の、前記リフレクタ部が形成された領域の厚み方向直下を除く領域に、前記スリットと交差するように形成された凹部を有し、
前記凹部及び前記リフレクタ部の発光素子搭載用凸部を除く底部に白色樹脂が充填されていることを特徴とする発光装置。 - 請求項11又は12に記載の発光装置であって、
前記凹部を充填する樹脂は、前記スリットに充填された絶縁材料と同材料であることを特徴とする発光装置。
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JP2010212382A JP5367668B2 (ja) | 2009-11-17 | 2010-09-22 | 発光装置およびその製造方法 |
KR1020100111312A KR20110055401A (ko) | 2009-11-17 | 2010-11-10 | 발광장치 및 그의 제조방법 |
CN201010551938.4A CN102064246B (zh) | 2009-11-17 | 2010-11-17 | 发光装置的制造方法 |
EP10014696.8A EP2323182B1 (en) | 2009-11-17 | 2010-11-17 | Light emitting device and method for manufacturing the same |
US12/948,521 US8746932B2 (en) | 2009-11-17 | 2010-11-17 | Light emitting device and method for manufacturing the same |
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JP2019021929A (ja) * | 2018-10-03 | 2019-02-07 | 日亜化学工業株式会社 | 発光装置 |
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US11616179B2 (en) | 2018-12-28 | 2023-03-28 | Nichia Corporation | Light emitting device and method of manufacturing light emitting device |
US12080835B2 (en) | 2018-12-28 | 2024-09-03 | Nichia Corporation | Light emitting device and method of manufacturing light emitting device |
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JP5367668B2 (ja) | 2013-12-11 |
CN102064246B (zh) | 2016-02-17 |
KR20110055401A (ko) | 2011-05-25 |
US8746932B2 (en) | 2014-06-10 |
EP2323182A3 (en) | 2014-04-02 |
US20110116271A1 (en) | 2011-05-19 |
CN102064246A (zh) | 2011-05-18 |
EP2323182A2 (en) | 2011-05-18 |
EP2323182B1 (en) | 2018-07-25 |
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