TWI606619B - Light-emitting diode having a silicon submount and light-emitting diode lamp - Google Patents

Description

Light-emitting diode with 矽 base and light-emitting diode lamp

The invention relates to a lighting device, in particular to a light-emitting diode with a 矽 base and a light-emitting diode lamp.

Whether it is in business offices, schools, homes, cars, street lamps, etc., there has always been a demand for high-brightness lighting equipment. Common halogen lamps are no longer subject to the disadvantages of high electricity costs and deterioration of irradiated objects. The market's favorite, gradually, the high-brightness but low electricity bill of the LED lamp has improved the many shortcomings of the halogen lamp and become the mainstream of the current lighting equipment.

In the past, the light-emitting diode lamp is composed of a light-emitting diode, a circuit board, a power controller, and a heat sink. In addition to the waste heat generated by the light-emitting diode, the power controller generates a large amount of waste heat, and if it is not fast and effective The heat dissipation design will make the light-emitting diodes intensively arranged, and the power supply controller must also maintain a certain distance from the light-emitting diodes, which respectively causes the brightness to be unimproved and the volume of the light-emitting diode lamps cannot be reduced. Because the volume of the power controller itself has been quite large, far larger than the LED and the circuit board, the volume of the LED lamp cannot be reduced, so the use of the LED lamp cannot be flexible and convenient. For example, as a cabinet light, it must occupy a certain thickness and depth of installation.

And as disclosed in my previous Republic of China invention patent No. I418736, Providing a light-emitting diode lamp with excellent heat dissipation design, under the concept of heat dissipation design disclosed in the prior patent, how to further enhance the product competitiveness of the light-emitting diode lamp is currently the research and development focus of the relevant industry.

Accordingly, it is an object of the present invention to provide a more optimized light emitting diode having a crucible base.

Accordingly, it is another object of the present invention to provide a light-emitting diode luminaire that can be substantially reduced in size and more optimized.

Therefore, the light-emitting diode of the present invention comprises: a germanium base and at least one light-emitting diode chip, the germanium base comprising a power control integrated circuit formed inside, and a bottom surface formed on the bottom surface a P electrode, an N electrode formed on the bottom surface, and a heat dissipation ground portion formed on the bottom surface, the power control integrated circuit is electrically connected to the P electrode and the N electrode, and the LED film is eutectic bonded to The illuminating diode top surface, the illuminating diode chip is electrically connected to the P electrode and the N electrode, wherein a heat dissipating channel is defined by the illuminating diode chip passing through the yoke base to the heat dissipating ground portion .

The light-emitting diode lamp of the present invention comprises a heat sink, a circuit board, at least one light-emitting diode, and a pair of wires, the heat sink includes a flat base surface, and a plurality of heat dissipation from the base surface a high-level circuit, the circuit board includes a heat-dissipating bottom surface corresponding to the base surface of the heat-dissipating base, and a plurality of channels corresponding to the heat-dissipating high-level platform, wherein the heat-dissipating high-level stations are located in the channels, and the light-emitting diodes are disposed on the circuit The illuminating diode includes a cymbal base and at least one illuminating diode chip, and the cymbal base includes a power control integrated circuit formed inside, a P electrode formed on the bottom surface, and an N electrode formed on the bottom surface, And a heat-dissipating grounding portion formed on the bottom surface, the power-control integrated circuit is electrically connected to the P-electrode and the N-electrode, and the light-emitting diode wafer is eutectic bonded to the top surface of the cymbal base, the light-emitting diode The wafer is electrically connected to the P electrode and the N electrode, wherein a heat dissipation channel is defined by the LED chip passing through the inside of the crucible base to the heat dissipation ground portion, and the pair of wires are used for connecting the circuit board to the outside power supply.

The utility model has the advantages that the light-emitting diode lamp has an excellent heat dissipation design, and the power control integrated circuit can be directly designed inside the crucible base, thereby replacing the conventional power controller and providing more optimized. The light-emitting diode can also greatly reduce the volume of the light-emitting diode lamp, and the object of the present invention is achieved.

1‧‧‧ Heat sink

11‧‧‧ base

12‧‧‧High heat platform

2‧‧‧ boards

21‧‧‧ Thermal bottom surface

22‧‧‧ channel

3‧‧‧Lighting diode

31‧‧‧矽 pedestal

311‧‧‧Power Control Integrated Circuit

312‧‧‧P electrode

313‧‧‧N electrode

314‧‧‧Solution grounding

315‧‧‧Solution channel

32‧‧‧Light Emitter Wafer

4‧‧‧Wire

5‧‧‧Interface alloy layer

61‧‧‧High melting point solder

62‧‧‧Low melting point solder

Other features and effects of the present invention will be apparent from the embodiments of the present invention. FIG. 1 is a perspective exploded view showing the light-emitting diode and the light-emitting diode lamp of the present invention. FIG. 2 is a perspective view showing a heat sink, a circuit board, a plurality of light emitting diodes, and a pair of wires in the first preferred embodiment; FIG. 3 is a schematic cross-sectional view A first pedestal of the light-emitting diode of the first preferred embodiment and a plurality of light-emitting diode chips are illustrated; FIG. 4 is a top plan view showing the 发光 of the light-emitting diode of the first preferred embodiment. The pedestal and the plurality of illuminating diode chips; FIG. 5 is a bottom view showing a P electrode, an N electrode and a heat dissipating ground portion of the first preferred embodiment; and FIG. 6 is a bottom view. The invention discloses a light-emitting diode with a 矽 base and a light-emitting diode A second preferred embodiment of a polar body luminaire.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , a first preferred embodiment of a light-emitting diode and a light-emitting diode lamp with a susceptor, the light-emitting diode lamp comprises a heat sink 1 and a circuit board. 2. A plurality of light-emitting diodes 3, a pair of wires 4, and an interface alloy layer 5.

The heat sink 1 includes a flat base surface 11 and a plurality of heat sinks 12 protruding from the base surface 11. The heat sink 1 may have a heat sink 1 of 380 W/m. K is made of copper with a heat transfer coefficient of 237 W/m. K's heat transfer coefficient of aluminum can be quickly exhausted.

The circuit board 2 includes a heat dissipation bottom surface 21 corresponding to the base surface 11 of the heat dissipation base 1 and a plurality of channels 22 corresponding to the heat dissipation platform 12, and the heat dissipation stages 12 respectively correspond to the circuit board 2 In the channel 22.

The LEDs 3 are disposed on the channel 22 of the circuit board 2 and are located on the top surface of the heat dissipation platform 12 of the heat sink 1 . The light emitting diodes 3 respectively include a germanium base 31 and a plurality of light emitting diode chips 32.

4 and FIG. 5, the material of the crucible base 31 is 矽, and the crucible has 170 W/m. The heat transfer coefficient of K, the turn base 31 includes a power control integrated circuit 311 formed inside, a P electrode 312 formed on the bottom surface, an N electrode 313 formed on the bottom surface, and a heat dissipation ground formed on the bottom surface The power control integrated circuit 311 is electrically connected to the P electrode 312 and the N electrode 313, wherein a heat dissipation channel 315 is defined by the light emitting diode chip 32 via the germanium base The inside of the seat 31 is to the heat dissipation ground portion 314, and the heat dissipation passage 315 is vertically downward.

The power control integrated circuit 311 is a technique in which a semiconductor epitaxial growth is performed into an integrated circuit, and a capacitor, an inductor, a resistor, or the like is designed as an integrated circuit and then formed inside the crucible base 31.

One of the functions of the heat dissipation grounding portion 314 is a grounding function. According to the luminaire lighting standard set by the International Electrotechnical Commission, the lower limit value of the light-emitting diode lamp having the grounding function is 500 VAC, and the first preferred embodiment The light-emitting diodes 3 have a withstand voltage of up to 700 VAC.

Another function of the heat dissipation grounding portion 314 is heat dissipation, and the heat of the power control integrated circuit 311 and the light emitting diode chips 32 can be conducted outward therefrom, and the heat dissipation ground portion 314 and the heat sink The heat dissipation stage 12 of the first stage is connected to the heat sink 1 to effectively remove the waste heat in the crucible base 31.

That is, in the first preferred embodiment, the heat dissipation channel 315 shares the heat dissipation ground portion 314 with the grounding function. Further, the power control integrated circuit 311 is disposed around the heat dissipation channel 315. The design consideration is that the light-emitting diode chip 32 needs an excellent heat dissipation effect compared to the power control integrated circuit 311, so that the space on the heat dissipation channel 315 is simply used for heat dissipation. The space of the heat dissipation passage 315 is not disposed or formed with the power control integrated circuit 311, so that the heat of the light-emitting diode wafer 32 can be conducted to the outside faster.

The power control integrated circuit 311 of the cymbal base 31 can be designed according to different external power sources, and the external power supply can be applied to the 20W LED 3 or the 30W LED 3, etc. The voltage and current can be matched to each other to control a single LED 3 The voltage value to be distributed can prevent the light-emitting diode 3 from being burnt out. Further, the power control integrated circuit 311 can control the brightness of the light-emitting diodes 3.

Since the power control integrated circuit 311 inside the cymbal base 31 replaces the power controller in the conventional illuminating diode lamp, the heat sink of the conventional illuminating diode lamp as the power controller can be omitted. In the past, it was limited by the heat dissipation design that the power control integrated circuit 311 and the light-emitting diode chip 32 were not combined. However, the prior art bottleneck can be broken by the prior Chinese invention patent No. I418736.

In the past, the pedestals of the light-emitting diodes 3 may be made of other materials such as alumina or aluminum nitride. For example, Philips uses aluminum oxide as a susceptor for aluminum nitride, although aluminum nitride. Compared with 矽, which has a higher heat transfer coefficient, but basically has only the effect of heat transfer and insulation, the material of the power control integrated circuit 311 is still grown by the semiconductor epitaxial growth.

It is to be noted that, in the first preferred embodiment, the cymbal base 31 can also be designed to include a temperature control integrated circuit, a color change control integrated circuit, and the like, the temperature control integrated circuit and the color change. The control integrated circuit can be formed inside the crucible base 31 by the same semiconductor epitaxial technique as the power control integrated circuit 311. (not shown)

The LEDs 32 are eutectic bonded to the top surface of the crucible base 31. The LED diodes 32 are electrically connected to the P electrodes 312 and the N electrodes 313, respectively. In the example, the light-emitting diode chips 32 are made of gallium nitride. Since the lattice mismatch between gallium nitride and germanium is not directly formed by the germanium epitaxial technology on the germanium susceptor 31. The LED chip 32 is illuminated, so that the eutectic bonding method is used to solve the mounting problem, and the yield of the eutectic bonding is high, and the heat dissipation efficiency is also higher than that of the silver paste bonding.

The pair of wires 4 are used to connect the circuit board 2 to an external power source, such as direct current or alternating current. The direct current power may be from solar energy or a battery, etc., the direct current specification may be 12V or 24V, etc., and the specification of the alternating current may be 110V or 210V, etc. .

The interface alloy layer 5 is located between the heat dissipation ground portion 314 of the crucible base 31 of the light emitting diodes 3 and the top surface of the heat dissipation platform 12 of the heat sinks 1 .

The heat sink 1 and the circuit board 2 are soldered using a high melting point solder 61. The light emitting diodes 3 and the heat sink 1 and the circuit board 2 are respectively soldered using a low melting point solder 62. The melting point of the high melting point solder 61 is 260. °C, low melting point solder 62 has a melting point of 150 °C.

The soldering sequence is such that the circuit board 2 and the heat sink 1 are soldered using the high melting point solder 61, and then the light emitting diodes 3 and the heat sink 1 and the circuit board 2 are soldered using a low melting point solder 62. Since the low melting point solder 62 has a higher melting point and the melting point solder 61 is lower, when the light emitting diode 3 and the heat sink 1 and the circuit board 2 are subsequently soldered, the circuit board 2 is not dissipated. The high melting point solder 61 of the seat is melted.

The top surface of the heat dissipation platform 12 of the heat sink 1 and the interface alloy layer 5 are higher than the circuit board 2, and the thickness of the interface alloy layer 5 is less than 0.03 mm to avoid the distance of the light emitting diodes 3 due to the distance. The circuit board 2 is too far to cause contact failure such as air welding, and the heat dissipation ground portion 314 of the crucible base 31 and the top surface of the heat dissipation base 12 of the heat sink base 1 are formed with a gold-tin alloy layer, so that the heat sink 1 is welded. The high heat transfer coefficient of the oxygen-free pure copper and the oxygen-free pure aluminum is maintained before and after the gold-tin alloy layer is welded, and the interface alloy layer 5 is formed. The heat-dissipating ground portion 314 of the raft base 31 and the heat-dissipating block 1 are disposed between the top surface of the heat-dissipating platform 12 The air gap can be filled by the low melting point solder 62. The light emitting diodes 3 are more closely connected to the heat sink 1, and the low melting point solder 62 left after the welding is completed is very thin, and the air gap is filled through the low melting point solder 62. And avoiding the air to reduce the heat dissipation effect, can effectively improve the light-emitting diodes The contact area between the body 3 and the heat sink 1 further enhances the heat dissipation effect. In addition, before the soldering, the metal component gold of the gold-tin alloy layer can be prevented from being oxidized by the inertia itself, and the gold-tin alloy layer is used for the soldering. The metal component tin reduces the melting point and avoids melting of the high melting point solder 61 solder.

It is further explained that, since the top surface of the heat dissipation platform 12 of the heat sink 1 is not lower than the circuit board 2, the interface between the light emitting diodes 3 and the heat sink 1 is alloyed by using a predetermined pressure during welding. Layer 5 is thin and uniform in thickness.

Referring to FIG. 6, a second preferred embodiment of a light-emitting diode and a light-emitting diode lamp having a susceptor base is substantially the same as the first preferred embodiment, except that the P electrode 312 and the N are different. The positional arrangement of the electrode 313 and the heat dissipation ground portion 314 is different from that of the first preferred embodiment. In the second preferred embodiment, the P electrode 312 and the N electrode 313 are juxtaposed on one side, and the heat dissipation ground portion 314 is located. The other side.

In summary, the effect of the present invention is that the power control integrated circuit 311 can be directly designed inside the crucible base 31 because of the excellent heat dissipation design, instead of the conventional power supply control. The device provides a more optimized light-emitting diode 3, and the invention can have a luminous flux of 1919.960Lm under the power of 20.425W, which greatly improves the performance of the product, and can also greatly reduce the volume of the light-emitting diode lamp. The object of the invention is achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

1‧‧‧ Heat sink

11‧‧‧ base

12‧‧‧High heat platform

2‧‧‧ boards

21‧‧‧ Thermal bottom surface

22‧‧‧ channel

3‧‧‧Lighting diode

31‧‧‧矽 pedestal

311‧‧‧Power Control Integrated Circuit

314‧‧‧Solution grounding

315‧‧‧Solution channel

32‧‧‧Light Emitter Wafer

5‧‧‧Interface alloy layer

61‧‧‧High melting point solder

62‧‧‧Low melting point solder

Claims (11)

A light-emitting diode having a crucible base, comprising: a crucible base comprising a power control integrated circuit formed inside, a P electrode formed on the bottom surface, an N electrode formed on the bottom surface, and a bottom surface formed on the bottom surface a heat dissipation grounding portion, the power control integrated circuit is electrically connected to the P electrode and the N electrode; and at least one light emitting diode chip is eutectic attached to the top surface of the germanium base, the light emitting diode chip Electrically connecting with the P electrode and the N electrode, wherein the crucible base defines a heat dissipation channel from the LED substrate through the interior of the crucible base to the heat dissipation ground portion; wherein the power control integrated circuit Provided around the heat dissipation channel; and wherein the heat dissipation channel is vertically downward. The light-emitting diode according to claim 1, wherein the power control integrated circuit is disposed on the P electrode and the N electrode. The light-emitting diode with a susceptor according to claim 1, wherein the heat dissipation channel is connected to the heat dissipation ground. The illuminating diode with a susceptor according to claim 1, wherein the cymbal base further comprises a temperature control integrated circuit. The illuminating diode with a susceptor according to claim 1, wherein the cymbal base further comprises a color changing control integrated circuit. A light-emitting diode lamp comprising: a heat sink, comprising a flat base surface, and a plurality of heat dissipation platforms protruding from the base surface; a circuit board comprising a heat dissipation bottom surface corresponding to the base surface of the heat sink base, And multiple pairs, etc. a heat dissipation platform is disposed in the channel; and at least one light emitting diode is disposed on the circuit board channel and located on a top surface of the heat dissipation platform of the heat sink, each of the light emitting diodes includes a susceptor and at least one illuminating diode chip, the cymbal base comprising a power control integrated circuit formed inside, a P electrode formed on the bottom surface, an N electrode formed on the bottom surface, and a bottom electrode formed on the bottom surface a heat-dissipating grounding portion, the power-control integrated circuit is electrically connected to the P-electrode and the N-electrode, and the light-emitting diode wafer is eutectic bonded to the top surface of the crucible base, the LED body and the P-electrode And the N-electrode is electrically connected to the heat-dissipating ground, wherein the heat-dissipating channel is connected to the heat-dissipating ground through the heat-dissipating ground. The heat sink and the circuit board are soldered using a high melting point solder, and the light emitting diode and the heat sink, the light emitting diode and the circuit board are respectively soldered using a low melting point solder. The illuminating diode lamp of claim 6, further comprising a layer of an alloy layer between the heat dissipating ground portion of the yoke base of the illuminating diode and the top surface of the heat dissipating platform of the heat sink. The illuminating diode lamp of claim 7, wherein the heat sink top surface of the heat sink and the interface alloy layer have a height higher than the circuit board, and the interface alloy layer has a thickness of less than 0.03 mm. The illuminating diode lamp of claim 7, wherein the heat dissipating ground portion of the raft base and the heat dissipating heat sink top surface are formed with a gold tin alloy layer, and the interface alloy layer is formed together. The illuminating diode lamp of claim 7, wherein the air gap is filled by solder between the heat dissipation ground portion of the raft base and the top surface of the heat dissipation platform of the heat sink. A luminaire comprising at least one light-emitting diode having a susceptor base as claimed in claim 1.