JP2006202962A - Light emitting apparatus - Google Patents

Light emitting apparatus Download PDF

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Publication number
JP2006202962A
JP2006202962A JP2005012810A JP2005012810A JP2006202962A JP 2006202962 A JP2006202962 A JP 2006202962A JP 2005012810 A JP2005012810 A JP 2005012810A JP 2005012810 A JP2005012810 A JP 2005012810A JP 2006202962 A JP2006202962 A JP 2006202962A
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Prior art keywords
light emitting
phosphor
light
led
emitting element
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JP2005012810A
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JP5109226B2 (en
JP2006202962A5 (en
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Yoshinobu Suehiro
好伸 末広
Seiji Yamaguchi
誠治 山口
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Toyoda Gosei Co Ltd
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Toyoda Gosei Co Ltd
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Priority to JP2005012810A priority Critical patent/JP5109226B2/en
Priority to US11/334,745 priority patent/US20060171152A1/en
Publication of JP2006202962A publication Critical patent/JP2006202962A/en
Publication of JP2006202962A5 publication Critical patent/JP2006202962A5/ja
Priority to US12/929,331 priority patent/US8294160B2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10—Bump connectors; Manufacturing methods related thereto
    • H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
    • H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
    • H01L2224/161—Disposition
    • H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
    • H01L2924/181—Encapsulation

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light emitting apparatus ensuring excellent reliability, stable acquisition of brightness for a long period of time, and easier manufacturing thereof without generation of uneven coloring. <P>SOLUTION: A phosphor material thin film 6B is provided on the front surface of a glass sealing part 6 having a semi-spherical optical part 6A. Since an optical path length to the thin film of phosphor material 6B from the light extracting surface of an LED element 2 becomes almost equal, the excellent sealing property of the LED element 2 can be maintained without deterioration in the sealing member, and stable brightness can also be maintained for a long period of time. Moreover, generation of uneven coloring can be controlled based on difference in the optical path length. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、発光素子から放射される光を波長変換して放射する波長変換型の発光装置に関し、特に、信頼性に優れ、長期にわたって安定した輝度が得られるとともに色むらを生じることのない発光装置に関する。   The present invention relates to a wavelength conversion type light emitting device that emits light by converting the wavelength of light emitted from a light emitting element, and in particular, light emission that is excellent in reliability, can provide stable luminance over a long period of time, and does not cause color unevenness. Relates to the device.

従来の発光装置として、ＬＥＤ（Light Emitting Diode）素子を光源に用いた発光装置が知られている。近年、このような発光装置の用途は、車載用の照明機器、液晶デバイスのバックライト光源、小型電子機器のランプ等に広く拡大しつつあり、これら以外にも様々な用途が見込まれている。   As a conventional light emitting device, a light emitting device using an LED (Light Emitting Diode) element as a light source is known. In recent years, the use of such a light-emitting device has been widely expanded to in-vehicle lighting equipment, backlight light sources of liquid crystal devices, lamps of small electronic equipment, and various other uses are expected.

このようなＬＥＤ素子から放射される光を蛍光体で波長変換することにより、白色光を放射させる半導体発光装置が提案されている（例えば、特許文献１参照。）。   A semiconductor light emitting device that emits white light by converting the wavelength of light emitted from such an LED element with a phosphor has been proposed (see, for example, Patent Document 1).

特許文献１の半導体発光装置は、レンズ形の樹脂封止体を備えたＬＥＤと、樹脂封止体を包囲する透光性の蛍光カバーとを備えている。ＬＥＤは、４３０〜４８０ｎｍに発光ピークを有するＧａＮ系半導体発光素子である。蛍光カバーは、肉薄なフィルム状の樹脂からなり、樹脂封止体に密着する弾性力を有し、半導体発光素子の発光に基づいて励起されて蛍光を発する蛍光体が添加されている。   The semiconductor light-emitting device of Patent Document 1 includes an LED including a lens-shaped resin sealing body and a translucent fluorescent cover that surrounds the resin sealing body. The LED is a GaN-based semiconductor light-emitting element having an emission peak at 430 to 480 nm. The fluorescent cover is made of a thin film-like resin, has an elastic force to be in close contact with the resin sealing body, and is added with a fluorescent substance that is excited based on light emission of the semiconductor light emitting element and emits fluorescence.

特許文献１の半導体発光装置によると、樹脂封止体の周囲に蛍光カバーを設けることで、半導体発光素子から放射される光と蛍光体によって波長変換された光との混合に基づいて所望の発光色を高輝度で得ることができる。
特開２００４−２２１６１９号公報（〔０００９〕、〔００１４〕図１） According to the semiconductor light emitting device of Patent Document 1, by providing a fluorescent cover around the resin sealing body, desired light emission based on a mixture of light emitted from the semiconductor light emitting element and light converted in wavelength by the fluorescent material. Color can be obtained with high brightness.
Japanese Patent Laying-Open No. 2004-221619 ([0009], [0014] FIG. 1)

しかし、特許文献１の半導体発光装置によると、以下の問題がある。
（１）ＧａＮ系半導体発光素子から放射される光によって樹脂からなる封止体および蛍光カバーの劣化が生じるため、長期使用に対する信頼性を確保することが難しい。また、劣化が生じると発光装置の輝度を低下させるという問題がある。
（２）半導体発光装置の光放射性が樹脂封止体および蛍光カバーの成形性に依存するため、色むらや配光特性を重視すると蛍光カバーの形状精度や蛍光体の均一性を高度なレベルで成立させる必要があり、製造工程の煩雑化、コスト増加を招くという問題がある。 However, the semiconductor light emitting device of Patent Document 1 has the following problems.
(1) The light emitted from the GaN-based semiconductor light-emitting element causes deterioration of the sealing body made of resin and the fluorescent cover, so that it is difficult to ensure reliability for long-term use. In addition, when deterioration occurs, there is a problem that the luminance of the light emitting device is lowered.
(2) Since the light emission of the semiconductor light-emitting device depends on the moldability of the resin encapsulant and the fluorescent cover, the shape accuracy of the fluorescent cover and the uniformity of the fluorescent substance are at a high level when emphasizing color unevenness and light distribution characteristics. There is a problem that the manufacturing process is complicated and the cost is increased.

従って、本発明の目的は、信頼性に優れ、長期にわたって安定した輝度が得られるとともに色むらを生じることのない発光装置を提供することにある。   Accordingly, an object of the present invention is to provide a light emitting device that is excellent in reliability, has stable luminance over a long period of time, and does not cause color unevenness.

本発明は、上記目的を達成するため、フリップ実装型の発光素子と、前記発光素子を搭載する無機材料からなる基板と、前記発光素子を封止する無機封止材料からなる封止部と、前記無機封止材料で形成される略半球状の光学形状部と、前記光学形状部を覆って設けられる蛍光体部とを有することを特徴とする発光装置を提供する。   To achieve the above object, the present invention provides a flip-mounting type light emitting element, a substrate made of an inorganic material on which the light emitting element is mounted, a sealing portion made of an inorganic sealing material for sealing the light emitting element, Provided is a light-emitting device comprising: a substantially hemispherical optical shape portion formed of the inorganic sealing material; and a phosphor portion provided so as to cover the optical shape portion.

また、本発明は、上記した目的を達成するため、フリップ実装型の発光素子と、前記発光素子を搭載し、前記発光素子と同等の熱膨張率を有する無機材料からなる基板と、前記発光素子を封止し、前記基板および前記発光素子と同等の熱膨張率を有する無機封止材料からなる封止部と、前記無機封止材料で形成される略半球状の光学形状部と、前記光学形状部を覆って設けられる蛍光体部とを有することを特徴とする発光装置を提供する。   In order to achieve the above object, the present invention provides a flip-mounting type light emitting element, a substrate on which the light emitting element is mounted and made of an inorganic material having a thermal expansion coefficient equivalent to that of the light emitting element, and the light emitting element. A sealing portion made of an inorganic sealing material having a thermal expansion coefficient equivalent to that of the substrate and the light emitting element, a substantially hemispherical optical shape portion formed of the inorganic sealing material, and the optical There is provided a light emitting device including a phosphor portion provided to cover a shape portion.

本発明によると、無機材料で形成される発光素子と基板とを無機封止材料で封止することにより封止性が向上し、信頼性が向上する。また、発光素子から放射される光による劣化を生じにくくなるため、長期にわたって色むらを生じることなく安定した輝度が得られる。   According to the present invention, sealing performance is improved by sealing a light emitting element formed of an inorganic material and a substrate with an inorganic sealing material, thereby improving reliability. In addition, since deterioration due to light emitted from the light emitting element is less likely to occur, stable luminance can be obtained without causing color unevenness over a long period of time.

（第１の実施の形態）
図１は、本発明の第１の実施の形態に係る発光装置としてのＬＥＤを示し、（ａ）は発光装置の縦断面図、（ｂ）はガラス封止部の表面における光の放射を示す概略図である。 (First embodiment)
FIG. 1 shows an LED as a light emitting device according to a first embodiment of the present invention, (a) is a longitudinal sectional view of the light emitting device, and (b) shows light emission on the surface of the glass sealing portion. FIG.

（全体の構成）
このＬＥＤ１は、図１（ａ）に示されるようにフリップチップ型のＬＥＤ素子２と、回路パターン４Ａ、４Ｂ、およびビアパターン４Ｃとを有する無機材料基板であるＡｌ２Ｏ３基板３と、回路パターン４ＢとＬＥＤ素子２の電極とを電気的に接続するＡｕバンプ５と、Ａｌ２Ｏ３基板３およびＬＥＤ素子２とを封止する無機封止材料であり、略半球形状の光学形状部が形成されたガラス封止部６とを有する。 (Overall configuration)
As shown in FIG. 1A, the LED 1 includes an Al 2 O 3 substrate 3 that is an inorganic material substrate having flip-chip type LED elements 2, circuit patterns 4A and 4B, and via patterns 4C, and a circuit. It is an inorganic sealing material that seals the Au bump 5 that electrically connects the pattern 4B and the electrode of the LED element 2, the Al 2 O 3 substrate 3, and the LED element 2, and the optical shape portion having a substantially hemispherical shape It has the formed glass sealing part 6.

（各部の構成）
ＬＥＤ素子２は、下地基板となるサファイア基板上にＡｌＮバッファ層を介してｎ−ＧａＮ層と、発光層と、ｐ−ＧａＮ層とを順次結晶成長させることによって形成したＧａＮ系半導体層を有し、ｐ−ＧａＮ層からエッチングを施すことによりｎ電極形成領域としてｎ−ＧａＮ層の一部を露出させた水平型の電極構造を有し、Ａｕバンプ５を介して回路パターン４Ｂ上にフリップ実装されている。このＬＥＤ素子２は、発光中心波長が４７０ｎｍであり、熱膨張率は７×１０−６／℃である。また、ＬＥＤ１の光学形状部の幅とＬＥＤ素子２の幅（最大幅：正方形形状では対角）とのサイズ比は２１／２以上で、かつ１０以下となるように構成されている。 (Configuration of each part)
The LED element 2 has a GaN-based semiconductor layer formed by sequentially growing an n-GaN layer, a light emitting layer, and a p-GaN layer through an AlN buffer layer on a sapphire substrate as a base substrate. , Having a horizontal electrode structure in which a part of the n-GaN layer is exposed as an n-electrode formation region by etching from the p-GaN layer, and is flip-mounted on the circuit pattern 4B via the Au bump 5 ing. The LED element 2 has an emission center wavelength of 470 nm and a thermal expansion coefficient of 7 × 10 −6 / ° C. The size ratio between the width of the optical shape portion of the LED 1 and the width of the LED element 2 (maximum width: diagonal in a square shape) is 2 1/2 or more and 10 or less.

Ａｌ２Ｏ３基板３は、熱膨張率が７×１０−６／℃であり、ＬＥＤ素子２と略同等の熱膨張率を有し、タングステン（Ｗ）−ニッケル（Ｎｉ）−金（Ａｕ）で構成される回路パターン４Ａ、４Ｂ、およびビアパターン４Ｃを有する。 The Al 2 O 3 substrate 3 has a thermal expansion coefficient of 7 × 10 −6 / ° C., has a thermal expansion coefficient substantially equal to that of the LED element 2, and is composed of tungsten (W) -nickel (Ni) -gold (Au). Circuit patterns 4A and 4B, and via pattern 4C.

ガラス封止部６は、６００℃以下の低融点でホットプレス加工が可能な低融点ガラスからなり、ＬＥＤ素子２およびＡｌ２Ｏ３基板３の熱膨張率と略同等の熱膨張率（７×１０−６／℃）を有する。また、表面には半球状に形成された光学形状部６Ａと、光学形状部６Ａの表面に蛍光体部として薄膜状に設けられる蛍光体薄膜６Ｂとを有する。 The glass sealing portion 6 is made of a low melting point glass that can be hot-pressed at a low melting point of 600 ° C. or less, and has a thermal expansion coefficient (7 × approximately equal to the thermal expansion coefficient of the LED element 2 and the Al 2 O 3 substrate 3. 10 −6 / ° C.). Moreover, it has the optical shape part 6A formed in the hemisphere on the surface, and the phosphor thin film 6B provided in a thin film form as a phosphor part on the surface of the optical shape part 6A.

蛍光体薄膜６Ｂは、Ｃｅ：ＹＡＧ(Yttrium Aluminum Garnet)蛍光体を含有するアクリルコート材を光学形状部６Ａの表面に塗布し、乾燥させることによって薄膜状に形成されている。ガラス封止部６を透過して蛍光体薄膜６Ｂに至った光Ｌｂは、図１（ｂ）に示すように蛍光体に照射され、蛍光体からは黄色光Ｌｂ１〜ｌｂ３が放射される。   The phosphor thin film 6B is formed into a thin film by applying an acrylic coating material containing Ce: YAG (Yttrium Aluminum Garnet) phosphor on the surface of the optical shape portion 6A and drying it. The light Lb that has passed through the glass sealing portion 6 and reached the phosphor thin film 6B is irradiated to the phosphor as shown in FIG. 1B, and yellow light Lb1 to lb3 is emitted from the phosphor.

（ＬＥＤの製造工程）
以下に、第１の実施の形態のＬＥＤの製造方法について説明する。 (LED manufacturing process)
Below, the manufacturing method of LED of 1st Embodiment is demonstrated.

図２（ａ）から（ｅ）は、第１の実施の形態のＬＥＤの製造工程を示す概略図である。以下の説明においては、予め分離用のＶ溝３Ａおよびビアホールが設けられたＡｌ２Ｏ３基板３を用いるものとする。 FIGS. 2A to 2E are schematic views showing the manufacturing process of the LED of the first embodiment. In the following description, it is assumed that an Al 2 O 3 substrate 3 provided with a V groove 3A for separation and a via hole in advance is used.

（配線形成工程）
まず、図２（ａ）に示すように、上記したＡｌ２Ｏ３基板３に対し、回路パターンに応じてＷペーストをスクリーン印刷する。次に、Ｗペーストを印刷されたガラス含有Ａｌ２Ｏ３基板３を１５００℃で熱処理することによりＷをＡｌ２Ｏ３基板３に焼き付け、さらにＷ上にＮｉめっき、Ａｕめっきを施すことで回路パターン４Ａ、４Ｂ、およびビアパターン４Ｃを形成する。 (Wiring formation process)
First, as shown in FIG. 2A, W paste is screen-printed on the Al 2 O 3 substrate 3 according to the circuit pattern. Next, the glass-containing Al 2 O 3 substrate 3 printed with the W paste is heat-treated at 1500 ° C. so that W is baked on the Al 2 O 3 substrate 3, and further, Ni plating and Au plating are performed on the W. Patterns 4A and 4B and via pattern 4C are formed.

（ＬＥＤ素子実装工程）
次に、図２（ｂ）に示すように、Ａｌ２Ｏ３基板３の回路パターン４ＢにＡｕバンプ５を介してＬＥＤ素子２をフリップ実装する。 (LED element mounting process)
Next, as shown in FIG. 2B, the LED element 2 is flip-mounted on the circuit pattern 4B of the Al 2 O 3 substrate 3 via the Au bumps 5.

（低融点ガラス準備工程）
次に、図２（ｃ）に示すように、板状のＰ２Ｏ５−ＺｎＯ−Ｌｉ２Ｏ系の低融点ガラス６０をＡｌ２Ｏ３基板３に対して平行にセットする。 (Low melting point glass preparation process)
Next, as shown in FIG. 2C, a plate-like P 2 O 5 —ZnO—Li 2 O-based low melting glass 60 is set in parallel to the Al 2 O 3 substrate 3.

（ガラス封止工程）
次に、図２（ｄ）に示すように、窒素雰囲気中で５５０〜６００℃の温度で低融点ガラス６０のホットプレス加工を行う。低融点ガラス６０は、Ａｌ２Ｏ３基板３とそれらに含まれる酸化物を介して基板表面に接着されるとともに、プレス金型の形状に応じて半球状の光学形状部６Ａを有したガラス封止部６が成形される。 (Glass sealing process)
Next, as shown in FIG. 2D, hot pressing of the low-melting glass 60 is performed at a temperature of 550 to 600 ° C. in a nitrogen atmosphere. The low melting point glass 60 is bonded to the substrate surface via the Al 2 O 3 substrate 3 and oxides contained therein, and has a glass seal having a hemispherical optical shape portion 6A according to the shape of the press mold. A stop 6 is formed.

（蛍光体薄膜形成工程）
次に、図２（ｅ）に示すように、複数のＬＥＤ１が連続して形成された状態で、ガラス封止部６の表面に蛍光体含有アクリルコート材を塗布し、乾燥させることによって光学形状部６Ａの表面に蛍光体薄膜６Ｂを設ける。この後、Ｖ溝３Ａに沿ってＡｌ２Ｏ３基板３を分割することにより、ＬＥＤ１を分離する。 (Phosphor thin film forming process)
Next, as shown in FIG. 2 (e), a phosphor-containing acrylic coating material is applied to the surface of the glass sealing portion 6 in a state where a plurality of LEDs 1 are continuously formed, and dried to form an optical shape. A phosphor thin film 6B is provided on the surface of the portion 6A. Thereafter, the LED 1 is separated by dividing the Al 2 O 3 substrate 3 along the V-groove 3A.

（ＬＥＤ１の動作）
以下に、第１の実施の形態の動作について説明する。図示しない電源部から回路パターン４Ａを介して通電することにより、ＬＥＤ素子２の電極を介して発光層に通電される。発光層は、通電に基づいて発光して青色光を生じる。この青色光は、ＧａＮ系半導体層からサファイア基板を介してガラス封止部６に入射し、光学形状部６Ａに至る。光学形状部６Ａに至った青色光は蛍光体薄膜６Ｂに入射する。蛍光体薄膜６Ｂに含有された蛍光体は、青色光の照射に基づいて励起されて黄色光を放射する。この黄色光と青色光とが混合されることにより白色光を生じ、蛍光体薄膜６Ｂから外部放射される。 (Operation of LED1)
The operation of the first embodiment will be described below. By energizing from the power supply unit (not shown) via the circuit pattern 4A, the light emitting layer is energized via the electrode of the LED element 2. The light emitting layer emits light based on energization to generate blue light. This blue light enters the glass sealing portion 6 from the GaN-based semiconductor layer through the sapphire substrate and reaches the optical shape portion 6A. The blue light reaching the optical shape portion 6A is incident on the phosphor thin film 6B. The phosphor contained in the phosphor thin film 6B is excited based on the irradiation with blue light and emits yellow light. The yellow light and the blue light are mixed to generate white light, which is emitted from the phosphor thin film 6B.

（第１の実施の形態の効果）
上記した第１の実施の形態によると、以下の効果が得られる。 (Effects of the first embodiment)
According to the first embodiment described above, the following effects are obtained.

（１）ＬＥＤ素子２は、半球状の光学形状部６Ａを有したガラス封止部６で封止されるので、ＬＥＤ素子２の自発熱や自発光による封止部材の劣化を生じることなくＬＥＤ素子２の封止性に優れ、長期にわたって輝度の安定したＬＥＤ１が得られる。また、ガラス封止部６とＡｌ２Ｏ３基板３とは、樹脂封止する場合と異なり、熱膨張率が同等であるため接合性が高い。このため、高い信頼性を備えた小型のＬＥＤ１を具現化することができる。 (1) Since the LED element 2 is sealed by the glass sealing part 6 having the hemispherical optical shape part 6A, the LED element 2 does not cause deterioration of the sealing member due to self-heating or self-emission of the LED element 2. The LED 1 having excellent sealing performance of the element 2 and stable luminance over a long period of time can be obtained. Further, unlike the case of resin sealing, the glass sealing portion 6 and the Al 2 O 3 substrate 3 have the same thermal expansion coefficient and thus have high bonding properties. For this reason, small LED1 provided with high reliability can be embodied.

（２）ＬＥＤ素子２の光取り出し面から蛍光体薄膜６Ｂに適度な距離を持たせ、蛍光体薄膜６Ｂは均一な膜厚なので、小型ＬＥＤとしても蛍光体分散型のように蛍光体層内での光路長差による色むらの発生を抑制することができる。すなわち、蛍光体分散型では、光路長の大なる光は蛍光体層を透過する距離が大になるので黄色寄りに変化し、光路長の小なる光は蛍光体層を透過する距離が小なので青色が強くなるが、本実施の形態では光学形状部６Ａの表面に薄膜状に均一な厚さの蛍光体層を設けることで上記した光路長の差を解消できる。 (2) The phosphor thin film 6B is provided with an appropriate distance from the light extraction surface of the LED element 2, and the phosphor thin film 6B has a uniform thickness. It is possible to suppress the occurrence of color unevenness due to the optical path length difference. That is, in the phosphor-dispersed type, light with a long optical path length has a longer distance to transmit through the phosphor layer, so it changes to yellow, and light with a small optical path length has a short distance to transmit through the phosphor layer. In this embodiment, the difference in optical path length can be eliminated by providing a phosphor layer with a uniform thickness on the surface of the optical shape portion 6A in the present embodiment.

光学形状は、略半球形状とすることでＬＥＤ素子２から蛍光体薄膜６Ｂまでの距離を適度に取り、ＬＥＤ素子２が発するどの方向の光に対しても光学形状部６Ａへの入射角が垂直を中心に略均一となるようにしてある。このような構成によって光学形状部６Ａでの界面反射損失を最も小さくすることができるので、光学形状部６Ａの表面や蛍光体薄膜６Ｂで反射された光がＬＥＤ素子２で再吸収されることがない。更に、蛍光体６Ｂへの入射角に大きな差が生ぜず、そのことによって色むらの発生を防止できる。また、ＬＥＤ１のサイズが小さくても、色むらや効率低下が生じないものとでき、蛍光体使用量を少なくできることから、部材費低減を図ることができる。   The optical shape is substantially hemispherical so that the distance from the LED element 2 to the phosphor thin film 6B is appropriately set, and the incident angle to the optical shape portion 6A is perpendicular to light in any direction emitted from the LED element 2. It is made to be substantially uniform around the center. With such a configuration, the interface reflection loss in the optical shape portion 6A can be minimized, so that the light reflected by the surface of the optical shape portion 6A and the phosphor thin film 6B can be reabsorbed by the LED element 2. Absent. Furthermore, there is no great difference in the incident angle to the phosphor 6B, which can prevent the occurrence of color unevenness. Further, even if the size of the LED 1 is small, color unevenness and efficiency reduction can be prevented, and the amount of phosphor used can be reduced, so that the member cost can be reduced.

（３）基板上に形成された複数のＬＥＤ１に対し、蛍光体を含有したアクリルコート材の塗布に基づいて蛍光体薄膜６Ｂを形成するので、複数のＬＥＤ１に対し良質の蛍光体薄膜６Ｂを容易に形成でき、生産性に優れる。また、アクリルは耐光性に優れるため、蛍光体薄膜の劣化も生じない。 (3) Since the phosphor thin film 6B is formed on the plurality of LEDs 1 formed on the substrate based on the application of the acrylic coating material containing the phosphor, a high-quality phosphor thin film 6B can be easily formed on the plurality of LEDs 1. It is possible to form and it is excellent in productivity. Moreover, since acrylic has excellent light resistance, the phosphor thin film does not deteriorate.

なお、第１の実施の形態の実施の形態では、Ｖ溝３Ａを有したＡｌ２Ｏ３基板３を用いてＬＥＤ１の形成後に分割するようにしたが、例えば、ダイサーによるダイシング加工によってＬＥＤ１を分割するようにしても良い。また、Ａｌ２Ｏ３基板３上に実装されるＬＥＤ素子２についてもＧａＮ系ＬＥＤ素子に限定されず、ＧａＰ系、ＧａＡｓ系のＬＥＤ素子であっても良い。蛍光体についても同様であり、使用するＬＥＤ素子の発光波長に基づいて励起可能な蛍光体を選択して用いることができる。 In the first embodiment, the LED 1 is divided after the formation of the LED 1 using the Al 2 O 3 substrate 3 having the V groove 3A. For example, the LED 1 is divided by dicing by a dicer. You may make it do. Further, the LED element 2 mounted on the Al 2 O 3 substrate 3 is not limited to the GaN-based LED element, and may be a GaP-based or GaAs-based LED element. The same applies to the phosphor, and an excitable phosphor can be selected and used based on the emission wavelength of the LED element to be used.

光学形状部６Ａは集光を目的としたものではなく、高効率で色むらなく外部放射するためのものである。集光特性が必要な場合には、ＬＥＤ１をさらに樹脂モールドするなどして集光光学系を設ければ良い。   The optical shape portion 6A is not intended for condensing, but is used for external radiation with high efficiency and no color unevenness. When the light condensing characteristic is necessary, the light condensing optical system may be provided by further resin molding the LED 1.

ＬＥＤ１の光学形状部の幅とＬＥＤ素子２の幅とのサイズ比は、封止材料、基板との接合強度および加工方法条件によるダメージ等とも関係するが、５以下で形成することが好ましい。   The size ratio between the width of the optical shape portion of the LED 1 and the width of the LED element 2 is related to the sealing material, the bonding strength with the substrate, damage due to processing method conditions, and the like.

（第２の実施の形態）
図３は、本発明の第２の実施の形態に係る発光装置の縦断面図である。以下の説明において、第１の実施の形態と同一の構成および機能を有する部分については同一の符号を付している。 (Second Embodiment)
FIG. 3 is a longitudinal sectional view of a light emitting device according to the second embodiment of the present invention. In the following description, parts having the same configuration and function as those of the first embodiment are denoted by the same reference numerals.

（全体の構成）
このＬＥＤ１は、光学形状部６Ａの表面に第１の実施の形態で説明した蛍光体薄膜６Ｂに代えて、蛍光体含有ガラス層６Ｃを設けた構成において第１の実施の形態と相違している。 (Overall configuration)
This LED 1 is different from the first embodiment in the configuration in which the phosphor-containing glass layer 6C is provided on the surface of the optical shape portion 6A instead of the phosphor thin film 6B described in the first embodiment. .

（各部の構成）
蛍光体含有ガラス層６Ｃは、平均外径１０μｍの蛍光体粒子と、平均外径１０μｍのフッ化物低融点ガラス粒子とを混合した混合材料（融点約３００℃）からなり、この混合材料を光学形状部６Ａの形成されたガラス封止部６に対し、ガラス封止部６を３００℃に加熱し、更に電圧印加して静電塗装した後に３５０℃で加熱処理することによってガラス封止部６の表面に一体的に形成されている。 (Configuration of each part)
The phosphor-containing glass layer 6C is made of a mixed material (melting point: about 300 ° C.) in which phosphor particles having an average outer diameter of 10 μm and fluoride low-melting glass particles having an average outer diameter of 10 μm are mixed. The glass sealing part 6 formed with the part 6A is heated to 300 ° C., further subjected to electrostatic coating by applying a voltage, and then heated at 350 ° C. to heat the glass sealing part 6. It is integrally formed on the surface.

（第２の実施の形態の効果）
上記した第２の実施の形態によると、ガラス封止状態であるので、加熱状態で電圧印加することによる静電塗装が可能となり、ガラス封止部６の表面に蛍光体粒子とフッ化物低融点ガラス粒子とを混合した混合材料を静電付着させるので、第１の実施の形態の好ましい効果に加えて、凹凸形状のあるガラス封止部６の表面に混合材料を均一な膜厚で付着させることができ、熱融着による均一な膜厚の蛍光体含有ガラス層６Ｃを容易に形成することができる。また、フッ化物低融点ガラスによるフッ化物コートがガラス封止部６の表面に形成されるので、ＬＥＤ１の耐湿性をより向上させることができる。 (Effect of the second embodiment)
According to the second embodiment described above, since it is in a glass sealed state, electrostatic coating can be performed by applying a voltage in a heated state, and phosphor particles and fluoride low melting point are formed on the surface of the glass sealed portion 6. Since the mixed material mixed with the glass particles is electrostatically attached, in addition to the preferable effect of the first embodiment, the mixed material is attached to the surface of the glass sealing portion 6 having the uneven shape with a uniform film thickness. The phosphor-containing glass layer 6C having a uniform film thickness can be easily formed by heat fusion. Moreover, since the fluoride coat by a fluoride low melting glass is formed in the surface of the glass sealing part 6, the moisture resistance of LED1 can be improved more.

なお、ガラス材料は熱膨張率差によりクラックが生じ易いが、略半球形状のガラス封止部６表面に、ガラス封止部６より熱膨張率の大なるフッ化物低融点ガラスを融着させることで応力フリーになる溶融時から、常温にした際にクラックが生じ易い方向への応力が生じないようにしてある。つまり、圧縮方向への応力のみで、引っ張り応力、せん断応力が生じない形状としてある。この際、蛍光体粒子を含んだフッ化物低融点ガラスが、ガラス封止部６以上の熱膨張率である必要がある。   In addition, although a glass material is easy to produce a crack by the difference in thermal expansion coefficient, the fluoride low melting glass whose thermal expansion coefficient is larger than the glass sealing part 6 is fused to the surface of the glass sealing part 6 having a substantially hemispherical shape. Thus, stress is prevented from being generated in a direction in which cracks are likely to occur when the temperature is changed from melting to stress-free to room temperature. That is, the shape is such that tensile stress and shear stress are not generated only by the stress in the compression direction. At this time, the fluoride low-melting glass containing the phosphor particles needs to have a thermal expansion coefficient higher than that of the glass sealing portion 6.

（第３の実施の形態）
図４は、本発明の第３の実施の形態に係る発光装置の縦断面図である。 (Third embodiment)
FIG. 4 is a longitudinal sectional view of a light emitting device according to the third embodiment of the present invention.

（全体の構成）
このＬＥＤ１は、光学形状部６Ａの表面に蛍光体から放射された光のガラス封止部６への再入射を防ぐダイクロイックミラー６Ｄを設け、ダイクロイックミラー６Ｄの表面に蛍光体薄膜６Ｂを設けた構成において第１の実施の形態と相違している。 (Overall configuration)
This LED 1 has a configuration in which a dichroic mirror 6D for preventing re-incidence of light emitted from a phosphor to the glass sealing portion 6 is provided on the surface of the optical shape portion 6A, and a phosphor thin film 6B is provided on the surface of the dichroic mirror 6D However, this is different from the first embodiment.

（各部の構成）
ダイクロイックミラー６Ｄは、ＴｉＯ２膜およびＳｉＯ２膜を交互に積層して多層化することによって形成されており、５００ｎｍ以下の光を透過し、５００ｎｍ以上の光を反射する。このことよりダイクロイックミラー６ＤはＬＥＤ素子２の発する４７０ｎｍの青色光は透過するが、蛍光体薄膜６Ｂの蛍光体が発する黄色光については反射することにより、ガラス封止部６への入射を防ぐ。 (Configuration of each part)
The dichroic mirror 6D is formed by alternately laminating TiO 2 films and SiO 2 films to form a multilayer, and transmits light of 500 nm or less and reflects light of 500 nm or more. Accordingly, the dichroic mirror 6D transmits blue light of 470 nm emitted from the LED element 2, but reflects the yellow light emitted from the phosphor of the phosphor thin film 6B, thereby preventing incidence on the glass sealing portion 6.

（第３の実施の形態の効果）
上記した第３の実施の形態によると、蛍光体薄膜６Ｂと光学形状部６Ａとの間にダイクロイックミラー６Ｄを設けているので、蛍光体薄膜６Ｂで生じた黄色光がガラス封止部６に再入射し、さらにＬＥＤ素子２に吸収されることによるＬＥＤ素子２の発光効率低下を防ぐことができ、第１の実施の形態の好ましい効果に加えて高輝度化を実現することができる。なお、ＴｉＯ２膜およびＳｉＯ２膜は、耐湿コートとしての効果もあるので、耐湿性のやや劣る封止ガラス材料を用いたものでも耐湿性の高い発光装置とすることができる。 (Effect of the third embodiment)
According to the third embodiment described above, since the dichroic mirror 6D is provided between the phosphor thin film 6B and the optical shape portion 6A, yellow light generated in the phosphor thin film 6B is re-applied to the glass sealing portion 6. It is possible to prevent a decrease in light emission efficiency of the LED element 2 due to incidence and further absorption by the LED element 2, and it is possible to realize high brightness in addition to the preferable effect of the first embodiment. Note that since the TiO 2 film and the SiO 2 film also have an effect as a moisture-resistant coating, a light-emitting device having a high moisture resistance can be obtained even when a sealing glass material having slightly inferior moisture resistance is used.

（第４の実施の形態）
第４の実施の形態として、第３の実施の形態で説明したＬＥＤ１の光学形状部６Ａ上にスパッタリングで蛍光体薄膜６Ｂを形成した。 (Fourth embodiment)
As the fourth embodiment, the phosphor thin film 6B is formed by sputtering on the optical shape portion 6A of the LED 1 described in the third embodiment.

（第４の実施の形態の効果）
上記した第４の実施の形態によると、スパッタリングで蛍光体薄膜６Ｂを形成することにより、蛍光体濃度の高い蛍光体薄膜６Ｂを精度良く形成することができ、第３の実施の形態と同様の好ましい効果を得ることができる。特に、第３の実施の形態と比較し、蛍光体濃度が高いため、蛍光体薄膜６Ｂで生じた黄色光がガラス封止部６方向へ放射され易いが、蛍光体から黄色光がガラス封止部６側へ放射されてもダイクロイックミラー６Ｄで反射されるので、青色光との混合が促進されて色むらのない白色光を得ることができる。 (Effect of the fourth embodiment)
According to the fourth embodiment described above, by forming the phosphor thin film 6B by sputtering, the phosphor thin film 6B having a high phosphor concentration can be formed with high accuracy, and the same as in the third embodiment. A preferable effect can be obtained. In particular, since the phosphor concentration is higher than that in the third embodiment, yellow light generated in the phosphor thin film 6B is easily radiated toward the glass sealing portion 6, but yellow light from the phosphor is glass sealed. Even if it radiates | emits to the part 6 side, since it reflects with the dichroic mirror 6D, mixing with blue light is accelerated | stimulated and white light with no color unevenness can be obtained.

（第５の実施の形態）
図５は、本発明の第５の実施の形態に係るＬＥＤを示し、（ａ）はＬＥＤの平面図、（ｂ）は（ａ）のＬＥＤをＢ−Ｂ部で切断した断面図である。 (Fifth embodiment)
FIG. 5: shows LED which concerns on the 5th Embodiment of this invention, (a) is a top view of LED, (b) is sectional drawing which cut | disconnected LED of (a) by the BB part.

（全体の構成）
このＬＥＤ１は、Ａｌ２Ｏ３基板３上に発光中心波長が３７０ｎｍの紫外光ＬＥＤ素子２を光源とする３列×３＝９個の複数の発光部１０を有し、複数の発光部１０の表面を覆うようにダイクロイックミラー６Ｄを設け、さらにその表面に蛍光体薄膜６Ｂを設けた構成において第３の実施の形態と相違している。 (Overall configuration)
This LED 1 has, on an Al 2 O 3 substrate 3, a plurality of 3 rows × 3 = 9 light emitting units 10 using an ultraviolet LED element 2 having a light emission center wavelength of 370 nm as a light source. The configuration in which the dichroic mirror 6D is provided so as to cover the surface and the phosphor thin film 6B is further provided on the surface is different from that of the third embodiment.

（各部の構成）
Ａｌ２Ｏ３基板３は、複数のＬＥＤ素子２から発せられる熱を基板外へ放熱するための銅箔からなる放熱パターン４Ｄを有する。 (Configuration of each part)
The Al 2 O 3 substrate 3 has a heat radiation pattern 4D made of copper foil for radiating heat generated from the plurality of LED elements 2 to the outside of the substrate.

蛍光体薄膜６Ｂは、ＬＥＤ素子２から放射される紫外光によって励起されるＲＧＢ蛍光体を所定の割合で含有しており、励起に基づいて生じたＲ，Ｇ，Ｂの可視光の混合に基づいて白色光を生じる。   The phosphor thin film 6B contains RGB phosphors excited by ultraviolet light emitted from the LED element 2 at a predetermined ratio, and is based on a mixture of R, G, and B visible light generated based on the excitation. Produces white light.

ダイクロイックミラー６Ｄは、Ｔａ２Ｏ５膜およびＳｉＯ２膜を交互に積層して多層化することによって形成されており、ＬＥＤ素子２から放射される紫外光を透過し、蛍光体薄膜６Ｂの蛍光体が発するＲ，Ｇ，Ｂの可視光については反射することにより、ガラス封止部６への入射を防ぐ。なお、紫外光の吸収を抑えるためにＴａ２Ｏ５に代えてＨｆＯ２を用いても良い。 The dichroic mirror 6D is formed by alternately laminating Ta 2 O 5 films and SiO 2 films to form a multilayer, and transmits the ultraviolet light emitted from the LED element 2, and the phosphor of the phosphor thin film 6B. The R, G, and B visible light emitted from the light is reflected, thereby preventing incidence on the glass sealing portion 6. In order to suppress absorption of ultraviolet light, HfO 2 may be used instead of Ta 2 O 5 .

（第５の実施の形態の効果）
上記した第５の実施の形態によると、発光効率に優れる紫外光ＬＥＤ素子２とＲＧＢ蛍光体を含有した蛍光体薄膜６Ｂとを用いて複数の発光部１０をＡｌ２Ｏ３基板３上に形成したので、第３の実施の形態の好ましい効果に加えて演色性の付加された白色光を高輝度で放射させることができる。このように紫外光ＬＥＤ素子２を用いる構成であっても、ガラス封止部６によって封止されているので封止材の劣化が生じず、発光効率に優れる紫外光ＬＥＤ素子２を光源として、長期にわたって信頼性に優れるＬＥＤ１が得られる。なお、第５の実施の形態では、９個の発光部１０をＡｌ２Ｏ３基板３上に形成したＬＥＤ１を説明したが、９個以外の個数で形成しても良い。 (Effect of 5th Embodiment)
According to the fifth embodiment described above, a plurality of light emitting portions 10 are formed on the Al 2 O 3 substrate 3 using the ultraviolet LED element 2 having excellent luminous efficiency and the phosphor thin film 6B containing RGB phosphors. Therefore, in addition to the preferable effect of the third embodiment, white light with color rendering can be emitted with high luminance. Thus, even if it is the structure which uses the ultraviolet light LED element 2, since it is sealed by the glass sealing part 6, degradation of a sealing material does not arise, and the ultraviolet light LED element 2 excellent in luminous efficiency is used as a light source. LED1 excellent in reliability over a long period of time can be obtained. In the fifth embodiment, the LED 1 in which the nine light emitting units 10 are formed on the Al 2 O 3 substrate 3 has been described. However, the LED 1 may be formed in a number other than nine.

（第６の実施の形態）
図６は、本発明の第６の実施の形態に係るＬＥＤランプを示し、（ａ）はＬＥＤランプの縦断面図、（ｂ）はＬＥＤランプに搭載される発光部の縦断面図である。 (Sixth embodiment)
6A and 6B show an LED lamp according to a sixth embodiment of the present invention, in which FIG. 6A is a longitudinal sectional view of the LED lamp, and FIG. 6B is a longitudinal sectional view of a light emitting unit mounted on the LED lamp.

（全体の構成）
このＬＥＤランプ１００は、ナイロン樹脂で形成されるケース２０と、ケース２０に設けられる凹部の底部の素子搭載面２１に実装される発光部１０と、ケース２０の開口部を覆うとともにＲＧＢ蛍光体を含有した蛍光体薄膜２２Ａを積層されたダイクロイックミラー２３とを有し、ダイクロイックミラー２３は、可視光を透過し、紫外光を反射するように構成されている。発光部１０は、光源としての紫外光ＬＥＤ素子２と、光学形状部６Ａに紫外光を透過し、可視光を反射するダイクロイックミラー６Ｄとを有する。 (Overall configuration)
The LED lamp 100 includes a case 20 made of nylon resin, a light emitting unit 10 mounted on an element mounting surface 21 at the bottom of a recess provided in the case 20, an opening of the case 20, and an RGB phosphor. The dichroic mirror 23 having the phosphor thin film 22A contained therein is laminated, and the dichroic mirror 23 is configured to transmit visible light and reflect ultraviolet light. The light emitting unit 10 includes an ultraviolet LED element 2 as a light source, and a dichroic mirror 6D that transmits ultraviolet light to the optical shape unit 6A and reflects visible light.

ケース２０は、素子搭載面２１に連続して開口部方向に曲面で形成される反射面２２と、ケース２０の底面に設けられる外部回路接続用の回路パターン２４Ａと、素子搭載面２１に設けられて発光部１０の実装用回路パターン２４Ｂと、回路パターン２４Ａと回路パターン２４Ｂとを接続する内部配線パターン２４Ｃとを有する。   The case 20 is provided on the element mounting surface 21, a reflection surface 22 formed in a curved surface in the opening direction continuously with the element mounting surface 21, a circuit pattern 24 </ b> A for external circuit connection provided on the bottom surface of the case 20. The circuit pattern 24B for mounting the light emitting unit 10 and the internal wiring pattern 24C for connecting the circuit pattern 24A and the circuit pattern 24B are provided.

（ＬＥＤランプ１００の動作）
以下に、第６の実施の形態の動作について説明する。図示しない電源部から回路パターン２４Ａを介して通電することにより、ＬＥＤ素子２の電極を介して発光層に通電される。発光層は、通電に基づいて発光して紫外光を生じる。この紫外光は、ＧａＮ系半導体層からサファイア基板を介してガラス封止部６に入射し、光学形状部６Ａに至る。光学形状部６Ａに至った紫外光は、ダイクロイックミラー６Ｄを透過して発光部１０の外部に放射される。発光部１０の側面方向に放射された光は、反射面２２の表面に設けられる蛍光体薄膜２２Ａに入射し、ＲＧＢ蛍光体を励起するとともに反射面２２の形状に応じた方向に反射される。このＲＧＢ蛍光体の反射光が発光部１０のダイクロイックミラー６Ｄを透過した紫外光と混合されることによって生じた可視光は、ダイクロイックミラー２３を透過してケース外部に放射される。 (Operation of LED lamp 100)
The operation of the sixth embodiment will be described below. By energizing from the power supply unit (not shown) through the circuit pattern 24 </ b> A, the light emitting layer is energized through the electrode of the LED element 2. The light emitting layer emits light based on energization to generate ultraviolet light. This ultraviolet light enters the glass sealing portion 6 from the GaN-based semiconductor layer through the sapphire substrate and reaches the optical shape portion 6A. The ultraviolet light that has reached the optical shape portion 6A passes through the dichroic mirror 6D and is emitted to the outside of the light emitting portion 10. The light emitted in the side surface direction of the light emitting unit 10 is incident on the phosphor thin film 22A provided on the surface of the reflecting surface 22 to excite the RGB phosphor and is reflected in the direction according to the shape of the reflecting surface 22. The visible light generated by mixing the reflected light of the RGB phosphors with the ultraviolet light transmitted through the dichroic mirror 6D of the light emitting unit 10 is transmitted through the dichroic mirror 23 and emitted outside the case.

また、発光部１０の上方に放射された紫外光は、ケース２０を覆う蛍光体薄膜２２Ａに入射し、ＲＧＢ蛍光体を励起する。ＲＧＢ蛍光体から放射される励起光が、発光部１０のダイクロイックミラー６Ｄを透過した紫外光と混合されることにより生じた可視光は、ダイクロイックミラー２３を透過してケース外部に放射される。   Moreover, the ultraviolet light radiated | emitted above the light emission part 10 injects into the fluorescent substance thin film 22A which covers the case 20, and excites RGB fluorescent substance. Visible light generated by mixing the excitation light emitted from the RGB phosphor with the ultraviolet light transmitted through the dichroic mirror 6D of the light emitting unit 10 is transmitted through the dichroic mirror 23 and emitted outside the case.

（第６の実施の形態の効果）
上記した第６の実施の形態によると、蛍光体薄膜２２Ａを発光部１０とは別のケース側に設ける構成としても、色むらを生じることなく信頼性に優れる高輝度のＬＥＤランプ１００が得られる。なお、第６の実施の形態で説明した紫外光ＬＥＤ素子２を青色光ＬＥＤ素子２とし、蛍光体薄膜２２Ａに含まれるＲＧＢ蛍光体をＹＡＧ等の黄色蛍光体として白色光を外部放射させる構成としても良い。 (Effect of 6th Embodiment)
According to the above-described sixth embodiment, even when the phosphor thin film 22A is provided on the case side different from the light emitting unit 10, the high-intensity LED lamp 100 having excellent reliability without color unevenness can be obtained. . The ultraviolet LED element 2 described in the sixth embodiment is a blue light LED element 2, and the RGB phosphor included in the phosphor thin film 22A is a yellow phosphor such as YAG to emit white light externally. Also good.

本発明の第１の実施の形態に係る発光装置としてのＬＥＤを示し、（ａ）は発光装置の縦断面図、（ｂ）はガラス封止部の表面における光の放射を示す概略図である。1 shows an LED as a light-emitting device according to a first embodiment of the present invention, (a) is a longitudinal sectional view of the light-emitting device, and (b) is a schematic diagram showing light emission on the surface of a glass sealing portion. . （ａ）から（ｅ）は、第１の実施の形態のＬＥＤの製造工程を示す概略図である。(A) to (e) is a schematic view showing a manufacturing process of the LED of the first embodiment. 本発明の第２の実施の形態に係る発光装置の縦断面図である。It is a longitudinal cross-sectional view of the light-emitting device which concerns on the 2nd Embodiment of this invention. 本発明の第３の実施の形態に係る発光装置の縦断面図である。It is a longitudinal cross-sectional view of the light-emitting device which concerns on the 3rd Embodiment of this invention. 本発明の第５の実施の形態に係るＬＥＤを示し、（ａ）はＬＥＤの平面図、（ｂ）は（ａ）のＬＥＤをＢ−Ｂ部で切断した断面図である。The LED which concerns on the 5th Embodiment of this invention is shown, (a) is a top view of LED, (b) is sectional drawing which cut | disconnected LED of (a) by the BB part. 本発明の第６の実施の形態に係るＬＥＤランプを示し、（ａ）はＬＥＤランプの縦断面図、（ｂ）はＬＥＤランプに搭載される発光部の縦断面図である。The LED lamp which concerns on the 6th Embodiment of this invention is shown, (a) is a longitudinal cross-sectional view of an LED lamp, (b) is a longitudinal cross-sectional view of the light emission part mounted in an LED lamp.

符号の説明Explanation of symbols

１…ＬＥＤ、２…ＬＥＤ素子、３…Ａｌ２Ｏ３基板、３Ａ…Ｖ溝、４Ａ…回路パターン、４Ｂ…回路パターン、４Ｃ…ビアパターン、４Ｄ…放熱パターン、５…Ａｕバンプ、６…ガラス封止部、６Ｄ…ダイクロイックミラー、６Ａ…光学形状部、６Ｂ…蛍光体薄膜、６Ｃ…蛍光体含有ガラス層、１０…発光部、２０…ケース、２１…素子搭載面、２２…反射面、２２Ａ…蛍光体薄膜、２３…ダイクロイックミラー、２４Ａ…回路パターン、２４Ｂ…回路パターン、２４Ｃ…内部配線パターン、６０…低融点ガラス、１００…ＬＥＤランプ 1 ... LED, 2 ... LED element, 3 ... Al 2 O 3 substrate, 3A ... V groove, 4A ... circuit pattern, 4B ... circuit pattern, 4C ... via pattern, 4D ... radiating pattern, 5 ... Au bumps, 6 ... glass Sealing part, 6D ... Dichroic mirror, 6A ... Optical shape part, 6B ... Phosphor thin film, 6C ... Phosphor-containing glass layer, 10 ... Light emitting part, 20 ... Case, 21 ... Element mounting surface, 22 ... Reflecting surface, 22A ... Phosphor thin film, 23 ... Dichroic mirror, 24A ... Circuit pattern, 24B ... Circuit pattern, 24C ... Internal wiring pattern, 60 ... Low melting point glass, 100 ... LED lamp

Claims (8)

フリップ実装型の発光素子と、
前記発光素子を搭載する無機材料からなる基板と、
前記発光素子を封止する無機封止材料からなる封止部と、
前記無機封止材料で形成される略半球状の光学形状部と、
前記光学形状部を覆って設けられる蛍光体部とを有することを特徴とする発光装置。 Flip mounting type light emitting element,
A substrate made of an inorganic material on which the light emitting element is mounted;
A sealing portion made of an inorganic sealing material for sealing the light emitting element;
A substantially hemispherical optical shape portion formed of the inorganic sealing material;
And a phosphor portion provided to cover the optical shape portion. フリップ実装型の発光素子と、
前記発光素子を搭載し、前記発光素子と同等の熱膨張率を有する無機材料からなる基板と、
前記発光素子を封止し、前記基板および前記発光素子と同等の熱膨張率を有する無機封止材料からなる封止部と、
前記無機封止材料で形成される略半球状の光学形状部と、
前記光学形状部を覆って設けられる蛍光体部とを有することを特徴とする発光装置。 Flip mounting type light emitting element,
A substrate made of an inorganic material, mounted with the light emitting element and having a thermal expansion coefficient equivalent to that of the light emitting element;
Sealing the light emitting element, and a sealing portion made of an inorganic sealing material having a thermal expansion coefficient equivalent to that of the substrate and the light emitting element;
A substantially hemispherical optical shape portion formed of the inorganic sealing material;
And a phosphor portion provided to cover the optical shape portion. 前記無機封止材料は、ガラスからなることを特徴とする請求項１又は２に記載の発光装置。   The light emitting device according to claim 1, wherein the inorganic sealing material is made of glass. 前記蛍光体部は、蛍光体を含有した無機材料からなることを特徴とする請求項１又は２に記載の発光装置。   The light emitting device according to claim 1, wherein the phosphor portion is made of an inorganic material containing a phosphor. 前記蛍光体部は、前記封止部より大なる熱膨張率を有することを特徴とする請求項４に記載の発光装置。   The light emitting device according to claim 4, wherein the phosphor portion has a thermal expansion coefficient greater than that of the sealing portion. 前記蛍光体部は、屈折率の異なる材料を交互に積層して多層化されたダイクロイックミラーと、
前記ダイクロイックミラーと積層される蛍光体層とを有することを特徴とする請求項１から５のいずれか１項に記載の発光装置。 The phosphor part is a multilayered dichroic mirror in which materials having different refractive indexes are alternately laminated,
6. The light emitting device according to claim 1, further comprising a phosphor layer stacked on the dichroic mirror. 前記蛍光体部は、低融点フッ化物ガラスを含むものであることを特徴とする請求項１から６のいずれか１項に記載の発光装置。   The light emitting device according to claim 1, wherein the phosphor portion includes a low melting point fluoride glass. 前記光学形状部は、前記発光素子の幅との比が２１／２以上１０以下となるサイズであることを特徴とする請求項１から７のいずれか１項に記載の発光装置。 8. The light emitting device according to claim 1, wherein the optical shape portion has a size such that a ratio to a width of the light emitting element is 2 1/2 or more and 10 or less.
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