JP5972571B2 - 光半導体装置および照明装置 - Google Patents
光半導体装置および照明装置 Download PDFInfo
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Description
蛍光体の体積割合=(蛍光体の質量割合/蛍光体の比重)÷{(蛍光体の質量割合/蛍光体の比重)+(成形樹脂の質量割合/成形樹脂の比重)}
次いで、得られた成形樹脂組成物を、剥離フィルム2の上に塗布し、乾燥して、蛍光体層3を得る。
蛍光体の体積割合=(蛍光体の質量割合/蛍光体の比重)÷{(蛍光体の質量割合/蛍光体の比重)+(封止樹脂の質量割合/封止樹脂の比重)}
次いで、得られた封止樹脂組成物を、蛍光体層3の上に塗布し、乾燥して、封止樹脂層4を得る。
1.成形樹脂の調製
ERASTOSIL LR7665(旭化成ワッカー社製、ジメチルシロキサン骨格誘導体)のA液とB液とを1:1の比率で混合して、成形樹脂を調製した。得られた成形樹脂の比重は、1.0g/cm3であった。
2.封止樹脂の調製
40℃に加温したシラノール基両末端ポリシロキサン(下記式(1)中、R1がすべてメチル、nの平均が155、数平均分子量11,500、シラノール基当量0.174mmol/g)2031g(0.177モル)に対して、ビニルトリメトキシシラン15.76g(0.106モル)、および、(3−グリシドキシプロピル)トリメトキシシラン2.80g(0.0118モル)とを配合して、撹拌混合した。
実施例1
(封止シートの作成)
成形樹脂85gに蛍光体((Sr,Ba)2SiO4:Eu(バリウムオルソシリケート)比重:4.8g/cm3)15gを配合し、1時間、撹拌混合して、蛍光体を15質量%含有した成形樹脂組成物を調製した。
(半導体装置の作成)
LEDアレイ基板(外寸22mm×15mmのメタル基板に、12mmφ、深さ150μmの凹部が形成され、凹部内に3mm間隔で、9つ(3つ(縦)×3つ(横))の青色発光ダイオードチップが搭載されたLEDアレイ基板)に対して、封止シートを、封止樹脂層が青色発光ダイオードチップに対向されるように配置した(図3(a)参照)。
(封止シートの作成)
成形樹脂組成物に蛍光体を16.5質量%含有させ、封止樹脂組成物に蛍光体を6質量%含有させた以外は、上記した実施例1と同様にして、封止シートを得た。
(光半導体装置の作成)
上記した実施例1と同様にして、得られた封止シートを用いて青色発光ダイオードチップを封止し、光半導体装置を得た。
(封止シートの作成)
成形樹脂83gに蛍光体((Sr,Ba)2SiO4:Eu(バリウムオルソシリケート))17gを配合し、1時間、撹拌混合して、蛍光体を17質量%含有した成形樹脂組成物を調製した。
(封止シートの作成)
成形樹脂組成物に蛍光体を20質量%含有させ、封止樹脂組成物に蛍光体を3質量%含有させた以外は、上記した実施例3と同様にして、封止シートを得た。
(光半導体装置の作成)
上記した実施例1と同様にして、得られた封止シートを用いて青色発光ダイオードチップを封止し、光半導体装置を得た。
(封止シートの作成)
成形樹脂組成物に蛍光体を23質量%含有させ、封止樹脂組成物に蛍光体を1質量%含有させた以外は、上記した実施例3と同様にして、封止シートを得た。
(光半導体装置の作成)
上記した実施例1と同様にして、得られた封止シートを用いて青色発光ダイオードチップを封止し、光半導体装置を得た。
(封止シートの作成)
成形樹脂組成物に蛍光体を63質量%含有させ、封止樹脂組成物に蛍光体を含有させなかった以外は、上記した実施例1と同様にして、封止シートを得た。
(光半導体装置の作成)
上記した実施例1と同様にして、得られた封止シートを用いて青色発光ダイオードチップを封止し、光半導体装置を得た。
(封止シートの作成)
封止樹脂組成物に蛍光体を13.5質量%含有させ、蛍光体層を形成せずに剥離シートの上に封止樹脂層を形成した以外は、上記した実施例1と同様にして、封止シートを得た。
(光半導体装置の作成)
上記した実施例1と同様にして、得られた封止シートを用いて青色発光ダイオードチップを封止し、光半導体装置を得た。
4.光半導体装置の発光測定評価
(1)配光特性評価
各実施例および各比較例で得られた光半導体装置を270mAで点灯し、LED配光測定システム(GP−1000、大塚電子社製)により、0°(蛍光層と発光ダイオードとの対向方向)から85°(対向方向と直交する方向)の範囲で、視野角度を変更しながら色度(CIE−y)を測定した。結果を図5に示す。
(目視評価の評価基準)
○:光が白色に見える。
×:光が青色または黄色に見える。
(2)全光束測定
各実施例および各比較例で得られた光半導体装置を270mAで点灯し、瞬間マルチ測光システム(MCPD−9800、大塚電子社製)により、積分球方式で色度(CIE−y)を測定した。結果を表1に示す。
3 蛍光体層
4 封止樹脂層
10 光半導体装置
11 発光ダイオード
15 蛍光層
16 封止層
Claims (5)
- 光半導体素子と、
蛍光体を含有し、前記光半導体素子に対して間隔を隔てて対向配置される第1蛍光層と、
蛍光体を含有し、前記光半導体素子と前記第1蛍光層との間に介在され、前記光半導体素子を封止する第2蛍光層と
を備え、
前記光半導体素子は、複数、設けられ、前記光半導体素子と前記第1蛍光層との対向方向と直交する方向において並んでおり、
前記第1蛍光層中の前記蛍光体の体積と、前記第2蛍光層中の前記蛍光体の体積との比率が、87:13〜61:39であり、
前記対向方向における前記第1蛍光層の表面と、前記光半導体素子との距離は、前記対向方向と直交する方向における前記第2蛍光層の表面と、前記対向方向と直交する方向において前記第2蛍光層の表面に最も近接して配置される前記光半導体素子との距離よりも短いことを特徴とする、光半導体装置。 - 前記第1蛍光層および前記第2蛍光層は、シリコーン樹脂を含有することを特徴とする、請求項1に記載の光半導体装置。
- 前記第1蛍光層に含有される前記蛍光体、および、前記第2蛍光層に含有される前記蛍光体は、(Sr,Ba)2SiO4:Euであることを特徴とする、請求項1または2に記載の光半導体装置。
- 前記第1蛍光体層に含有される前記蛍光体と、前記第2蛍光体層に含有される前記蛍光体との総量は、全光束測定におけるCIE−yが0.32〜0.37となるように調整されていることを特徴とする、請求項1〜3のいずれか一項に記載の光半導体装置。
- 請求項1〜4のいずれか一項に記載の光半導体装置を備えることを特徴とする、照明装置。
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US13/728,270 US20130168717A1 (en) | 2011-12-28 | 2012-12-27 | Encapsulating sheet, producing method of optical semiconductor device, optical semiconductor device, and lighting device |
KR1020120154920A KR20130076768A (ko) | 2011-12-28 | 2012-12-27 | 봉지 시트, 광 반도체 장치의 제조 방법, 광 반도체 장치 및 조명 장치 |
EP12199447.9A EP2610932A1 (en) | 2011-12-28 | 2012-12-27 | Encapsulating sheet, producing method of optical semiconductor device, optical semiconductor device, and lighting device |
TW101150977A TW201327933A (zh) | 2011-12-28 | 2012-12-28 | 密封片材、光半導體裝置之製造方法、光半導體裝置及照明裝置 |
CN2012105875091A CN103187517A (zh) | 2011-12-28 | 2012-12-28 | 封装片、光半导体装置的制造方法、光半导体装置及照明装置 |
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