JP4947332B2 - LED heat block and LED device using the same - Google Patents

LED heat block and LED device using the same Download PDF

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JP4947332B2
JP4947332B2 JP2005021195A JP2005021195A JP4947332B2 JP 4947332 B2 JP4947332 B2 JP 4947332B2 JP 2005021195 A JP2005021195 A JP 2005021195A JP 2005021195 A JP2005021195 A JP 2005021195A JP 4947332 B2 JP4947332 B2 JP 4947332B2
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led
heat block
wiring board
printed wiring
block
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JP2006210677A (en
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良治 杉浦
正幸 桜井
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Showa Denko Materials Co Ltd
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Hitachi Chemical Co Ltd
Showa Denko Materials Co Ltd
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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
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805—Shape
    • H01L2224/4809—Loop shape
    • H01L2224/48091—Arched
    • 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
    • H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
    • H01L2224/732—Location after the connecting process
    • H01L2224/73251—Location after the connecting process on different surfaces
    • H01L2224/73265—Layer and wire connectors

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Description

本発明は、実装されるＬＥＤチップの放熱性と反射効率を向上させたＬＥＤ用放熱板兼反射板からなるＬＥＤ用ヒートブロックおよびそれを使用したＬＥＤ装置に関するものである。   The present invention relates to an LED heat block composed of an LED heat sink / reflector plate with improved heat dissipation and reflection efficiency of an LED chip to be mounted, and an LED device using the same.

近年、高輝度化したＬＥＤチップが開発され、これまでの携帯電話機等のテンキー照明やスポット的な照明に使用されるばかりではなく、電気スタンド等の比較的広範囲の照明用として使用され始めてきており、より高い放熱性が要求されるようになっている。
従来のＬＥＤ装置は、絶縁基板に貫通孔を形成し、貫通孔の一方側の開口を金属板で覆い、貫通孔の壁面および金属板の表面ならびに絶縁基板の表面にめっきによって金属膜を形成し、金属板上にＬＥＤチップを実装し、ワイヤボンディングでＬＥＤチップと絶縁基板上の金属膜との間を電気的に接続したものがある（例えば、特許文献１参照）。
また、図６に示すように、金属薄板によって形成したリードフレームに樹脂成形を施し、リードフレーム上にＬＥＤチップを実装した構造のＬＥＤ装置もある。すなわち、成形樹脂１００にすり鉢状の凹部１０１を設け、この凹部１０１の底部にリードフレーム１０２を埋設し、このリードフレーム１０２上にＬＥＤチップ１０３を搭載し、このＬＥＤチップ１０３とリードフレーム１０２の端子部１０４とを金属細線によってワイヤボンディング接続をしたものである。
なお、上述した従来技術のうち後者については、出願人が出願時点で知る限りにおいて文献公知ではない。また、出願人は、本明細書に記載した先行技術文献情報で特定される先行技術文献以外には、本発明に密接に関連する先行技術文献を出願時までに発見するには至らなかった。
特許第３１３７８２３号公報（段落「００２７」ないし「００３７」）。 In recent years, LED chips with higher brightness have been developed and are not only used for numeric keypad lighting and spot lighting for mobile phones so far, but are also starting to be used for relatively wide lighting such as desk lamps. Therefore, higher heat dissipation is required.
In the conventional LED device, a through hole is formed in an insulating substrate, an opening on one side of the through hole is covered with a metal plate, and a metal film is formed by plating on the wall surface of the through hole, the surface of the metal plate, and the surface of the insulating substrate. In some cases, an LED chip is mounted on a metal plate, and the LED chip and a metal film on an insulating substrate are electrically connected by wire bonding (for example, see Patent Document 1).
In addition, as shown in FIG. 6, there is also an LED device having a structure in which a lead frame formed of a thin metal plate is resin-molded and an LED chip is mounted on the lead frame. That is, a mortar-shaped recess 101 is provided in the molding resin 100, a lead frame 102 is embedded in the bottom of the recess 101, an LED chip 103 is mounted on the lead frame 102, and terminals of the LED chip 103 and the lead frame 102 are provided. The part 104 is connected by wire bonding with a thin metal wire.
Note that the latter of the above-described prior arts is not publicly known as long as the applicant knows at the time of filing. Further, the applicant has not found any prior art documents closely related to the present invention by the time of filing other than the prior art documents specified by the prior art document information described in this specification.
Japanese Patent No. 3137823 (paragraphs “0027” to “0037”).

上述した従来のＬＥＤ装置のうち前者の場合には、貫通穴の壁面の金属膜をめっきによって形成しているため、金属膜の膜厚を厚くするには自ずと限界があり、このため放熱性を向上させることができないという問題があった。
また、後者の場合には、リードフレーム１０２によって放熱性は向上するが大容量の熱放散が必要となる場合、さらにリードフレーム１０２を厚くすることになり成形精度が悪くなる。 及び折り曲げ成形で複雑なリードフレーム１０２を成型するための金型および樹脂を成型するための金型が必要なため費用がかさむというばかりではなく、成型樹脂１００の表面に膜厚が均一な金属めっきを施すことが困難であるため反射効率が低下するという問題があった。 In the former case of the conventional LED device described above, the metal film on the wall surface of the through hole is formed by plating, so there is a limit to increasing the film thickness of the metal film, and thus heat dissipation is reduced. There was a problem that it could not be improved.
In the latter case, the heat dissipation is improved by the lead frame 102, but when a large capacity of heat dissipation is required, the lead frame 102 is further thickened and the molding accuracy is deteriorated. In addition, a metal mold for molding a complicated lead frame 102 by bending and a mold for molding a resin are not only expensive, but also metal plating with a uniform film thickness on the surface of the molding resin 100 Therefore, there is a problem that the reflection efficiency is lowered.

本発明は上記した従来の問題に鑑みなされたものであり、その目的とするところは、新規のヒートブロック状のチップ搭載部を形成し、ＬＥＤ装置の放熱性の向上と反射効率の向上を図るとともに製造コストの低減を図ることにある。   The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to form a new heat block-shaped chip mounting portion to improve heat dissipation and reflection efficiency of the LED device. At the same time, the manufacturing cost is to be reduced.

この目的を達成するために、請求項１に係る発明は、ＬＥＤチップが搭載されるＬＥＤチップ搭載部と、このＬＥＤチップ搭載部を囲む枠状に形成した反射枠とを有し、プリント配線板に設けられた貫通穴に嵌入させて固定する円柱状のヒートブロックであって、前記反射枠の上端外部または前記ヒートブロックの下端外部に配置され、前記プリント配線板表面の導体パターンと接合する鍔と、前記ヒートブロックの柱状外部に前記鍔の裏面から縦方向に形成される縦状突起とを有し、前記縦状突起が、前記鍔に近接している方を大きくしたテーパー形状であるＬＥＤ用ヒートブロックである。
To this end, the invention according to claim 1, the LED chip mounting portion LED chip is mounted, possess a reflection frame formed in a frame shape surrounding the LED chip mounting portion, the printed circuit board a cylindrical heat block is fitted into the through holes provided to fix the, disposed at the lower end outside the upper external or the heat block of the reflective frame, you joined to the conductor pattern of the printed wiring board surface a flange, said possess a longitudinal shaped protrusions formed in the longitudinal direction from the rear surface of the flange to the cylindrical outside of the heat block, said longitudinal-shaped projections are tapered der having an increased who are in close proximity to the flange LED heat block .

請求項２に係る発明は、請求項１に係る発明において、ＬＥＤチップ搭載部と反射枠と鍔と縦状突起とが、金属ブロックや金属板から一体に形成されたＬＥＤ用ヒートブロックである。
The invention according to claim 2 is the LED heat block according to claim 1, wherein the LED chip mounting portion, the reflection frame, the collar, and the vertical protrusion are integrally formed from a metal block or a metal plate.

請求項３に係る発明は、請求項１または２のＬＥＤ用ヒートブロックと、このＬＥＤ用ヒートブロックが嵌入されためっきスルーホールまたは非めっきスルーホールである貫通穴、前記ＬＥＤ用ヒートブロックのＬＥＤ搭載部に搭載されたＬＥＤチップ、及びこのＬＥＤチップが電気的に接続された端子部が設けられたプリント配線板と、を備えるＬＥＤ装置である。また、請求項４に係る発明は、請求項３に係る発明において、プリント配線板の貫通穴に嵌入されたＬＥＤ用ヒートブロックの下端面が、前記プリント配線板の下面にある導体パターンや回路導体よりも下部表面に高く形成されるＬＥＤ装置である。また、請求項５に係る発明は、請求項４において、ＬＥＤ用ヒートブロックの下面底部にヒートシンク筐体を取付けたＬＥＤ装置である。
The invention according to claim 3 is the LED heat block according to claim 1 or 2 , the plated through hole or the non-plated through hole in which the LED heat block is inserted, and LED mounting of the LED heat block. And a printed wiring board provided with a terminal part to which the LED chip is electrically connected. The invention according to claim 4 is the conductor pattern or circuit conductor according to the invention according to claim 3 , wherein the lower end surface of the LED heat block inserted in the through hole of the printed wiring board is on the lower surface of the printed wiring board. The LED device is formed higher on the lower surface. The invention according to claim 5 is the LED device according to claim 4, wherein a heat sink casing is attached to the bottom of the lower surface of the LED heat block.

本発明によれば、金属の塊（金属製ブロック）となっているＬＥＤ用ヒートブロックによって形成した熱伝導体積（熱伝導容量）の大きい放熱ブロック上のＬＥＤチップ搭載部にＬＥＤチップを搭載するため放熱性が従来技術で公知となっている金属薄板状の配線板や金属板リードフレームに比較し大幅に向上する。   According to the present invention, the LED chip is mounted on the LED chip mounting portion on the heat radiation block having a large heat conduction volume (heat conduction capacity) formed by the LED heat block which is a metal lump (metal block). The heat dissipation is greatly improved compared to a metal thin plate-like wiring board or metal plate lead frame known in the prior art.

また、熱伝導体積の大きい金属ブロックでチップ搭載部と反射枠（反射部）とを一体に形成してあるため、この反射枠（反射板）も発熱や発光による熱放散が良好となりＬＥＤ部品の輝度劣化を防止できる。さらに、ＬＥＤ用ヒートブロックの表面の粗さも均一に平滑にすることができるから、この反射枠（反射板）内面上に形成する貴金属めっきやアルミ蒸着等の鏡面効果によって反射効率を向上させることができる。
また、ヒートブロックを成形するための金型のみを用意すればよいから、金型にかかるコストを低減することができる。 In addition, since the chip mounting part and the reflection frame (reflection part) are integrally formed with a metal block having a large heat conduction volume, this reflection frame (reflection plate) also has good heat dissipation due to heat generation and light emission, so that LED components Brightness deterioration can be prevented. Furthermore, since the roughness of the surface of the LED heat block can be evenly smoothed, the reflection efficiency can be improved by a mirror effect such as precious metal plating or aluminum deposition formed on the inner surface of the reflecting frame (reflecting plate). it can.
Moreover, since it is only necessary to prepare a mold for molding the heat block, the cost for the mold can be reduced.

以下、本発明の実施の形態を図に基づいて説明する。図１は本発明に係るＬＥＤ用放熱板兼反射板であるヒートブロックの全体を示す外観斜視図、図２は同じくＬＥＤ用ヒートブロックの断面図、図３は本発明に係るＬＥＤ用ヒートブロックを嵌入させる貫通穴が設けられたプリント配線板を説明するための断面図、図４は本発明に係るＬＥＤ用ヒートブロックを嵌入させた状態を説明するための断面図、図５は本発明に係るＬＥＤ装置を示す断面図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view showing an entire heat block which is a heat sink / reflector for LED according to the present invention, FIG. 2 is a cross-sectional view of the LED heat block, and FIG. 3 is an LED heat block according to the present invention. Sectional drawing for demonstrating the printed wiring board provided with the through-hole to insert, FIG. 4 is sectional drawing for demonstrating the state which inserted the heat block for LED which concerns on this invention, FIG. 5 concerns on this invention It is sectional drawing which shows an LED apparatus.

図１に全体を符号１で示すものは円柱状のＬＥＤ用ヒートブロックであって、ＬＥＤチップが搭載されるチップ搭載部（ランド）２と、ＬＥＤチップ搭載部を囲む枠状に形成した反射枠３と、この反射枠３の上端外部に連結する鍔４と、前記のＬＥＤ用ヒートブロック１の柱状外部に連結固定する縦状突起５とによって構成されている。   1 is a column-shaped heat block for an LED, and includes a chip mounting portion (land) 2 on which an LED chip is mounted, and a reflection frame formed in a frame shape surrounding the LED chip mounting portion. 3, a flange 4 connected to the outside of the upper end of the reflection frame 3, and a vertical protrusion 5 connected and fixed to the columnar outside of the LED heat block 1.

このＬＥＤ用ヒートブロック１は１枚のアルミ、黄銅、銅、Ｎｉ、Ｆｅ、ステンレスなどからなる厚板（厚みが０．５〜２．０ｍｍ）の金属板を打ち抜き加工や絞り加工によって形成することにより、上記チップ搭載部２と、このＬＥＤチップ搭載部２を囲む枠状に形成した反射枠（反射板）３と、この反射枠３の上端外部に連結する鍔４と、前記柱状ブロックであるヒートブロック１の柱状外部に連結固定する縦状突起５とが１枚の金属板や金属の塊（ブロック）によって一体に形成される。   This LED heat block 1 is formed by stamping or drawing a thick metal plate (thickness 0.5 to 2.0 mm) made of a single piece of aluminum, brass, copper, Ni, Fe, stainless steel, or the like. Thus, the chip mounting portion 2, the reflective frame (reflecting plate) 3 formed in a frame shape surrounding the LED chip mounting portion 2, the flange 4 connected to the outside of the upper end of the reflective frame 3, and the columnar block. The vertical projections 5 connected and fixed to the columnar exterior of the heat block 1 are integrally formed by a single metal plate or metal lump (block).

また、ＬＥＤ用ヒートブロック１は円柱や角柱などの金属の塊（ブロック）からプレス等の塑性加工によってＬＥＤ用ヒートブロック１を成形加工しても良い。
つまり、このＬＥＤ用ヒートブロック１はチップ搭載部２と反射枠３と鍔４と縦状突起５とを金属ブロックや金属板の金属材料から一体の金属の塊（ブロック）として形成したものである。 Alternatively, the LED heat block 1 may be formed from a metal block (block) such as a cylinder or a prism by plastic working such as pressing.
That is, the LED heat block 1 is formed by forming the chip mounting portion 2, the reflection frame 3, the flange 4, and the vertical protrusion 5 as a single metal block from a metal material such as a metal block or a metal plate. .

本発明の一例として、Φ５．０の銅円柱から金型で絞り加工して図２の断面図で示すようなＬＥＤ用ヒートブロック１を成形した。図２の断面図で示すＬＥＤチップが搭載されるチップ搭載部２ランドは、金型によるプレス絞り加工によって凹型に陥没している底面が平らなＬＥＤチップ搭載部２であり、この陥没しているＬＥＤチップ搭載部２から上部表面に向かって拡がって傾斜した（傾斜角度６０度）反射枠３と、この反射枠３の上端外部に設けた鍔４とからなる裁頭円錐台状を呈する空間１０が陥没して設けられている。   As an example of the present invention, a heat block for LED 1 as shown in the cross-sectional view of FIG. The chip mounting portion 2 land on which the LED chip shown in the cross-sectional view of FIG. 2 is mounted is the LED chip mounting portion 2 having a flat bottom surface that has been depressed into a concave shape by press drawing with a mold. A space 10 having a truncated conical shape composed of a reflective frame 3 that is inclined toward the upper surface from the LED chip mounting portion 2 (inclination angle 60 degrees) and a ridge 4 provided outside the upper end of the reflective frame 3. Is depressed and provided.

なお、ヒートブロック１の柱状外部に連結固定する縦状突起５は裁頭円錐台状の円錐形とし、上端外部に設けた鍔４に近接している方を大きくしたテーパーの縦状突起物５とし４〜８個の複数個を連結付加させた。さらに、反射枠３はリフレクターとするものであり上部表面に向かって拡がっている傾斜角度は４５度〜７５度とし、内面に反射効率の良いめっきを施した反射板とする。   The vertical protrusion 5 connected and fixed to the outside of the columnar shape of the heat block 1 is a truncated cone-shaped conical shape, and the tapered vertical protrusion 5 is larger in the vicinity of the flange 4 provided outside the upper end. 4-8 pieces were connected and added. Further, the reflection frame 3 is a reflector, and the angle of inclination extending toward the upper surface is 45 to 75 degrees, and the inner surface is a reflection plate plated with good reflection efficiency.

また、図２の断面図で示すＬＥＤチップ搭載部２から上部外部表面に拡がる陥没空間１０を裁頭円錐台状に形成したＬＥＤ用ヒートブロック１の反射部は、テーパー形状の他に放物線形状や段付きテーパー形状として反射効率の高いＬＥＤ装置とすることも可能である。   In addition to the tapered shape, the reflecting portion of the LED heat block 1 in which the recessed space 10 extending from the LED chip mounting portion 2 shown in the cross-sectional view of FIG. It is also possible to provide an LED device with high reflection efficiency as a stepped taper shape.

この凹型に陥没している空間１０の高さ（鍔４の上面からＬＥＤ用ヒートブロックのＬＥＤチップ搭載部２までの高さ）Ｔ１は０．８ｍｍとした。また、ＬＥＤ用ヒートブロック１の全体厚みＴ２は１．２ｍｍとし、このＴ２はプリント配線板の厚みとほぼ同一、又は厚くなるように形成されていることが良い。また、平坦なＬＥＤチップ搭載部２の底面形状は円形、長円形、角形などとし、底面サイズも深さも搭載するＬＥＤチップによって決まる。本例ではΦ１．０の円形とした。
なお、ＬＥＤ用ヒートブロック１の製造方法としては、上述したように打ち抜き加工をした後に絞り加工をするようにしたが、絞り加工をしてから打ち抜き加工をするようにしてもよいし、絞り加工と打ち抜き加工とを同時にするようにしてもよい。 The height T1 of the space 10 recessed in the concave shape (the height from the upper surface of the ridge 4 to the LED chip mounting portion 2 of the LED heat block) was set to 0.8 mm. The total thickness T2 of the LED heat block 1 is 1.2 mm, and this T2 is preferably formed to be substantially the same as or thicker than the thickness of the printed wiring board. Further, the bottom shape of the flat LED chip mounting portion 2 is circular, oval, rectangular or the like, and is determined by the LED chip on which the bottom size and depth are mounted. In this example, it is a circular shape of Φ1.0.
In addition, as a manufacturing method of the LED heat block 1, the drawing process is performed after the punching process as described above. However, the drawing process may be performed after the drawing process, or the drawing process may be performed. And punching may be performed simultaneously.

このように金属ブロックの表面の粗さも均一に平滑に形成したＬＥＤ用ヒートブロック１の平坦な反射枠３の内面にニッケルめっきによる下地めっきを行い、その上に金、銀めっきの貴金属めっきを行う。また、アルミ蒸着や白色系めっきで反射面処理をしても良い。
この場合、金属ブロックによって形成された反射枠３の表面にめっきを行うため、この金属ブロック表面に形成された下地めっきとしてのニッケルめっきの膜厚が全体にわたって均一に形成される。このため、このニッケルめっき上に形成される金、銀、またはアルミめっきの表面が全体にわたって粗さ（凹凸）が極めて少ない鏡面状に形成されるため、この反射枠３の表面の反射効率を向上させることができる。 In this way, the inner surface of the flat reflecting frame 3 of the LED heat block 1 formed with a uniform and smooth surface roughness of the metal block is subjected to base plating by nickel plating, and noble metal plating of gold and silver is performed thereon. . Further, the reflective surface treatment may be performed by aluminum vapor deposition or white plating.
In this case, since plating is performed on the surface of the reflection frame 3 formed by the metal block, the thickness of the nickel plating as the base plating formed on the surface of the metal block is uniformly formed throughout. For this reason, since the surface of the gold, silver, or aluminum plating formed on the nickel plating is formed in a mirror shape with extremely little roughness (unevenness) over the entire surface, the reflection efficiency of the surface of the reflection frame 3 is improved. Can be made.

また、図７で示す本発明に係る第２のＬＥＤ用ヒートブロックについて説明する。
つまり、ＬＥＤ用ヒートブロック１の鍔４をＬＥＤチップ搭載部２の下部にあるヒートブロックの下端外周に連結して設け、ヒートブロック１の柱状外部に連結固定する縦状突起５は裁頭円錐台状の円錐形とし、下端外周に設けた鍔４に近接している方を大きくしたテーパー形状となる縦状突起物５を形成したものである。この第２のＬＥＤ用ヒートブロックはプリント配線板の貫通穴に下方面から嵌入させるものである。 Moreover, the 2nd heat block for LED which concerns on this invention shown in FIG. 7 is demonstrated.
That is, the vertical protrusion 5 that is provided by connecting the flange 4 of the LED heat block 1 to the outer periphery of the lower end of the heat block at the lower part of the LED chip mounting portion 2 and connecting and fixing the columnar outside of the heat block 1 is a truncated cone. A vertical projection 5 having a tapered shape with a larger conical shape and a larger portion close to the flange 4 provided on the outer periphery of the lower end is formed. The second LED heat block is inserted into the through hole of the printed wiring board from below.

次に、図３を用いて本発明に係るＬＥＤ用ヒートブロックを嵌入させる貫通穴１２が設けられたプリント配線板１１を説明する。
なお、同図においては、説明の便宜上、１個のＬＥＤ用ヒートブロックを嵌入させる貫通穴１２が設けられたプリント配線板のみを図示しているが、実際はＬＥＤ用のプリント配線板はマトリックス状に複数個の貫通穴が配置されている。
プリント配線板１１の所定箇所にドリルによって、貫通穴１２が設けられ、このプリント配線板１１の両面に所定の回路導体１７，１７を形成し、ＬＥＤ用ヒートブロックを嵌入させる貫通穴１２の上端周辺には前記ＬＥＤ用ヒートブロック１の反射枠３の表面に設けた鍔４を固定する導体パターン１４，１４を形成し、所定の回路導体１７，１７の必要な箇所にはＬＥＤチップと電気的に接続するワイヤーボンディング用端子部１６，１６を複数設けたプリント配線板１１である。 Next, the printed wiring board 11 provided with the through hole 12 into which the LED heat block according to the present invention is inserted will be described with reference to FIG.
In the figure, for the sake of convenience of explanation, only the printed wiring board provided with the through holes 12 into which one LED heat block is inserted is shown. However, the printed wiring board for LEDs is actually in a matrix. A plurality of through holes are arranged.
A through hole 12 is provided by a drill at a predetermined location of the printed wiring board 11, and predetermined circuit conductors 17 and 17 are formed on both surfaces of the printed wiring board 11, and the periphery of the upper end of the through hole 12 into which the LED heat block is inserted. Are formed with conductor patterns 14 and 14 for fixing the collar 4 provided on the surface of the reflection frame 3 of the LED heat block 1, and the predetermined circuit conductors 17 and 17 are electrically connected to the LED chip at necessary portions. The printed wiring board 11 is provided with a plurality of wire bonding terminal portions 16 and 16 to be connected.

また、電気的に接続するワイヤーボンディング用端子部１６，１６やはんだ接続用ランド以外の配線用の回路導体１７，１７はソルダーレジスト１８で被覆することが良好である。
次いで、電気的に接続するワイヤーボンディング接続用端子部１６，１６やはんだ接続用ランド上にニッケルと金または銀による貴金属めっきを行いプリント配線板１１を形成する。なお、上記の貫通穴１２は穴内壁にめっき膜を形成しためっきスルーホールでもめっき膜のない非めっきスルーホールのどちらでも良い。 Further, it is preferable that the wiring circuit conductors 17 and 17 other than the wire bonding terminal portions 16 and 16 and the solder connection lands to be electrically connected are covered with the solder resist 18.
Next, the printed wiring board 11 is formed by performing noble metal plating with nickel and gold or silver on the wire bonding connection terminals 16 and 16 and the solder connection lands that are electrically connected. The through hole 12 may be a plated through hole in which a plated film is formed on the inner wall of the hole or a non-plated through hole without a plated film.

次に、図４を用いて、上記のように形成したプリント配線板１１と前述したＬＥＤ用ヒートブロック１とによってＬＥＤ装置を製造する方法について説明する。
同図において、プリント配線板１１のＬＥＤ用ヒートブロック１を嵌入させる図３で記載説明した貫通穴１２の上端周辺に設けた前記ＬＥＤ用ヒートブロック１の鍔４を固定する導体パターン１４，１４上にクリームはんだを塗布する。
しかる後、プリント配線板１１の該貫通穴１２にＬＥＤ用ヒートブロック１の反射枠３の表面に設けた鍔４の下端まで嵌入させた状態で、プリント配線板１１の該貫通穴１２にＬＥＤ用ヒートブロック１を載置し固定する。
なお、ＬＥＤ用ヒートブロック１の全体厚みＴ２をプリント配線板の厚みより厚くなるように形成し、ＬＥＤ用ヒートブロックのチップ搭載部の下部にある放熱ブロックの下端面が配線用の回路導体１７，１７より高くはみだすようにしても良い。 Next, a method for manufacturing an LED device using the printed wiring board 11 formed as described above and the LED heat block 1 described above will be described with reference to FIG.
In the same figure, on the conductor patterns 14 and 14 for fixing the flange 4 of the LED heat block 1 provided around the upper end of the through hole 12 described in FIG. 3 for fitting the LED heat block 1 of the printed wiring board 11. Apply cream solder.
After that, in the state where the lower end of the flange 4 provided on the surface of the reflection frame 3 of the LED heat block 1 is fitted into the through hole 12 of the printed wiring board 11, the LED is inserted into the through hole 12 of the printed wiring board 11. The heat block 1 is placed and fixed.
The LED heat block 1 has a total thickness T2 that is greater than the thickness of the printed wiring board, and the lower end surface of the heat dissipating block at the lower portion of the chip mounting portion of the LED heat block is the circuit conductor 17 for wiring. You may make it protrude higher than 17.

この状態で、プリント配線板１１とＬＥＤ用ヒートブロック１とを加熱炉内で加熱することにより、クリームはんだを再溶融させ、プリント配線板１１の導体パターン１４，１４上にＬＥＤ用ヒートブロック１の鍔４を接合し、同図に示すように、ＬＥＤ用ヒートブロック１をプリント配線板１１の貫通穴１２に嵌入させて接合する。また、ＬＥＤ用ヒートブロック１とプリント配線板１１の導体パターン１４，１４との電気的な接続が必要ない場合はクリームはんだを使用せず、接着剤や超音波溶接、レーザー溶接などで固定することもできる。   In this state, the printed wiring board 11 and the LED heat block 1 are heated in a heating furnace to remelt the cream solder, and the LED heat block 1 is formed on the conductor patterns 14 and 14 of the printed wiring board 11. The collar 4 is joined, and the LED heat block 1 is fitted into the through hole 12 of the printed wiring board 11 and joined as shown in FIG. Also, when electrical connection between the LED heat block 1 and the conductor patterns 14 and 14 of the printed wiring board 11 is not required, it should be fixed with adhesive, ultrasonic welding, laser welding or the like without using cream solder. You can also.

なお、ヒートブロック１の円柱上端外部に連結固定する縦状突起５は裁頭円錐台状の上端外部に設けた鍔４に近接している方を大きくしたテーパー形状であり、プリント配線板１１の貫通穴１２にヒートブロック１を嵌入（圧入）する際のガイド（くさびの役目）となり鍔４まで圧入するから嵌入位置が一定となり仮固定状態を安定させる。   The vertical protrusion 5 connected and fixed to the outside of the upper end of the column of the heat block 1 has a tapered shape in which the one close to the flange 4 provided outside the upper end of the truncated cone shape is enlarged. It becomes a guide (the role of a wedge) when the heat block 1 is inserted (pressed) into the through hole 12 and press-fitted to the flange 4, so that the insertion position becomes constant and the temporarily fixed state is stabilized.

次に図８で示す本発明に係る第２のＬＥＤ用ヒートブロックを嵌入した状態を説明する。
前記の図７に示す本発明に係る第２のＬＥＤ用ヒートブロックをプリント配線板１１の該貫通穴１２に下方面から嵌入させるものである。つまり、プリント配線板１１の貫通穴１２周辺の下面にある導体パターン１４，１４上にＬＥＤ用ヒートブロック１の鍔４を接合し、同図に示すように、ＬＥＤ用ヒートブロック１をプリント配線板１１の貫通穴１２に下方面から嵌入させて接合する。従って、ＬＥＤ用ヒートブロックのチップ搭載部の下部にある放熱ブロックの下端面はプリント配線板１１の下面にある導体パターン１４，１４や配線用の回路導体１７，１７より下部表面に高く形成される。このＬＥＤ用ヒートブロック下部にある放熱ブロックの下端面に部品ケースの筐体を接触したり接続させることができる。 Next, a state where the second LED heat block according to the present invention shown in FIG. 8 is inserted will be described.
The second LED heat block according to the present invention shown in FIG. 7 is inserted into the through hole 12 of the printed wiring board 11 from the lower surface. That is, the flange 4 of the LED heat block 1 is joined to the conductor patterns 14 and 14 on the lower surface around the through hole 12 of the printed wiring board 11, and the LED heat block 1 is connected to the printed wiring board as shown in FIG. 11 is inserted into the through hole 12 from the lower surface and joined. Therefore, the lower end surface of the heat dissipating block below the chip mounting portion of the LED heat block is formed higher on the lower surface than the conductor patterns 14 and 14 on the lower surface of the printed wiring board 11 and the circuit conductors 17 and 17 for wiring. . The housing of the component case can be brought into contact with or connected to the lower end surface of the heat dissipation block at the lower part of the LED heat block.

次いで、図５に示すように、このＬＥＤ用ヒートブロック１はチップ搭載部２上にＬＥＤチップ２２をダイボンディングによって載置し、ＬＥＤチップ２２の端子と金属細線２３をプリント配線板１１のワイヤーボンディング用端子部１６にワイヤーボンディング接続によって電気的に接続するものである。（本図では＋端子．−端子ともワイヤーボンディング接続とした）
同図に示すように、ＬＥＤ用ヒートブロック１のチップ搭載部２とＬＥＤチップ２２とプリント配線板１１の端子部１６とを発光光線を透過させる透明なモールド樹脂や発光色を白色光に変換させる白色変換モールド樹脂などの１次モールド樹脂２４によって樹脂封止して１個単位としたＬＥＤ装置３０を形成する。なお、上記の１次モールド樹脂２４を硬化させた後、前記１次モールド樹脂２４の上面を被覆するように発光光線を集光または分光させるレンズモールド樹脂となる透明な２次モールド樹脂２５を凸型曲面状に被せると輝度向上が図られる。 Next, as shown in FIG. 5, the LED heat block 1 has the LED chip 22 mounted on the chip mounting portion 2 by die bonding, and the terminals of the LED chip 22 and the fine metal wires 23 are bonded to the printed wiring board 11 by wire bonding. The terminal portion 16 is electrically connected by wire bonding. (In this figure, both + terminal and-terminal are wire bonding connections)
As shown in the figure, the chip mounting portion 2 of the LED heat block 1, the LED chip 22, and the terminal portion 16 of the printed wiring board 11 are made to convert a transparent mold resin that transmits the emitted light and the light emission color into white light. The LED device 30 is formed as a single unit by resin sealing with a primary mold resin 24 such as a white conversion mold resin. After the primary mold resin 24 is cured, a transparent secondary mold resin 25 serving as a lens mold resin for condensing or dispersing emitted light so as to cover the upper surface of the primary mold resin 24 is projected. Brightness is improved by covering the curved surface.

このＬＥＤ装置３０のＬＥＤ用ヒートブロック１の下面底部にＬＥＤ部品の筐体となる別途ヒートシンク筐体を取り付けることにより、ＬＥＤチップ２２からの発熱は、ＬＥＤ用ヒートブロック１からヒートシンクを介してＬＥＤ装置３０の外部に放出される。このとき、ＬＥＤチップ２２が搭載されているＬＥＤ用ヒートブロック１が金属ブロックによって形成されているため、ヒートブロックの厚みを所定の厚さ以上でかつ均一に形成することができるから放熱性がさらに向上する。   By attaching a separate heat sink casing as an LED component casing to the bottom surface of the LED heat block 1 of the LED device 30, the heat generated from the LED chip 22 is transmitted from the LED heat block 1 via the heat sink to the LED device. 30 is discharged to the outside. At this time, since the LED heat block 1 on which the LED chip 22 is mounted is formed of a metal block, the heat block can be uniformly formed to have a thickness equal to or greater than a predetermined thickness, thereby further improving heat dissipation. improves.

本発明に係るＬＥＤ用ヒートブロックの全体を示す外観斜視図である。It is an external appearance perspective view which shows the whole heat block for LED which concerns on this invention. 本発明に係るＬＥＤ用ヒートブロックの断面図である。It is sectional drawing of the heat block for LED which concerns on this invention. 本発明に係るＬＥＤ用ヒートブロックを嵌入させる貫通穴が設けられたプリント配線板を説明するための断面図である。It is sectional drawing for demonstrating the printed wiring board provided with the through-hole which inserts the heat block for LED which concerns on this invention. 本発明に係るＬＥＤ用ヒートブロックを嵌入した状態を説明するための断面図。Sectional drawing for demonstrating the state which inserted the heat block for LED which concerns on this invention. 本発明に係るＬＥＤ装置を示す断面図である。It is sectional drawing which shows the LED device which concerns on this invention. 従来のＬＥＤ装置の断面図である。It is sectional drawing of the conventional LED device. 本発明に係る第２のＬＥＤ用ヒートブロックの断面図である。It is sectional drawing of the 2nd heat block for LED which concerns on this invention. 本発明に係る第２のＬＥＤ用ヒートブロックを嵌入した状態を説明する断面図。Sectional drawing explaining the state which inserted the 2nd heat block for LED which concerns on this invention.

符号の説明Explanation of symbols

１…ヒートブロック、２…チップ搭載部、３…ＬＥＤ用反射枠、４…鍔、５…縦状突起、
１０…空間、１１…プリント配線板、１２…貫通穴、１４…導体パターン、１６…端子部、
１７…回路導体、１８…ソルダーレジスト、２２…ＬＥＤチップ、２３…金属細線、
２４…１次モールド樹脂、２５…２次モールド樹脂、３０…ＬＥＤ装置。 DESCRIPTION OF SYMBOLS 1 ... Heat block, 2 ... Chip mounting part, 3 ... Reflection frame for LED, 4 ... 鍔, 5 ... Vertical protrusion,
DESCRIPTION OF SYMBOLS 10 ... Space, 11 ... Printed wiring board, 12 ... Through-hole, 14 ... Conductor pattern, 16 ... Terminal part,
17 ... Circuit conductor, 18 ... Solder resist, 22 ... LED chip, 23 ... Metal fine wire,
24 ... primary mold resin, 25 ... secondary mold resin, 30 ... LED device.

Claims (5)

ＬＥＤチップが搭載されるＬＥＤチップ搭載部と、このＬＥＤチップ搭載部を囲む枠状に形成した反射枠とを有し、プリント配線板に設けられた貫通穴に嵌入させて固定する円柱状のヒートブロックであって、
前記反射枠の上端外部または前記ヒートブロックの下端外部に配置され、前記プリント配線板表面の導体パターンと接合する鍔と、前記ヒートブロックの柱状外部に前記鍔の裏面から縦方向に形成される縦状突起とを有し、前記縦状突起が、前記鍔に近接している方を大きくしたテーパー形状であるＬＥＤ用ヒートブロック。 An LED chip mounting portion LED chip is mounted, possess a reflection frame formed in a frame shape surrounding the LED chip mounting portion, a cylindrical heat of fixing is fitted in a through hole provided on the printed wiring board Block,
Disposed at the lower end outside the upper external or the heat block of the reflective frame, a collar you joined to the conductor pattern of the printed wiring board surface, is formed in the longitudinal direction from the rear surface of the flange to the cylindrical outside of the heat block possess a longitudinal-like projection, the longitudinal shape projections, the LED for heat block is largely a tapered shape towards in close proximity to the flange. 請求項１において、In claim 1,
ＬＥＤチップ搭載部と反射枠と鍔と縦状突起とが、金属ブロックや金属板から一体に形成されたＬＥＤ用ヒートブロック。An LED heat block in which an LED chip mounting portion, a reflection frame, a collar, and a vertical protrusion are integrally formed from a metal block or a metal plate. 請求項１または２のＬＥＤ用ヒートブロックと、The heat block for LED of Claim 1 or 2,
このＬＥＤ用ヒートブロックが嵌入されためっきスルーホールまたは非めっきスルーホールである貫通穴、前記ＬＥＤ用ヒートブロックのＬＥＤ搭載部に搭載されたＬＥＤチップ、及びこのＬＥＤチップが電気的に接続された端子部が設けられたプリント配線板と、A through hole which is a plated through hole or a non-plated through hole in which the LED heat block is inserted, an LED chip mounted on the LED mounting portion of the LED heat block, and a terminal to which the LED chip is electrically connected A printed wiring board provided with a section;
を備えるＬＥＤ装置。An LED device comprising: 請求項３において、In claim 3,
プリント配線板の貫通穴に嵌入されたＬＥＤ用ヒートブロックの下端面が、前記プリント配線板の下面にある導体パターンや回路導体よりも下部表面に高く形成されるＬＥＤ装置。An LED device in which a lower end surface of an LED heat block inserted into a through hole of a printed wiring board is formed higher on a lower surface than a conductor pattern or a circuit conductor on a lower surface of the printed wiring board. 請求項４において、In claim 4,
ＬＥＤ用ヒートブロックの下面底部にヒートシンク筐体を取付けたＬＥＤ装置。The LED device which attached the heat sink housing | casing to the lower surface bottom part of the heat block for LED.
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