The best heat conductive substrate for flashlight

LED Flashlights – General Info
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For large power flashlight, the heat capacity of the light source is often concerned.

Most of traditional MCPCB we found on the market. The coefficients of heat conductivity of dielectrics are between 1~2 W/mK (1W or 2W in short). Of course, we can find 3W or even higher from the market. However, the copper or aluminum plate beneath the dielectric has coefficient of heat conductivity around 400W/mK and 200W/mK accordingly. It is clear that they have much better heat conducting performance than dielectric on top of them. This is causing dielectric to become the bottle neck of heat conducting & dissipating in traditional MCPCB.

The invention of thermoelectric separation of MCPCB is the best solution to overcome that bottle neck found in traditional MCPCB. Combining Super Pillar with thermoelectric separation concepts, to bypass dielectric and conduct heat directly through copper or aluminum pillar to copper or aluminum plate at the bottom. In this design, heat can be quickly take-away from components and dissipated through copper or aluminum plate at the bottom.

Now this MCPCB has been widely used in the flashlight, has been recognized by many customers.I hope that this sharing is useful to the flashlight enthusiasts on forum.

2

Yep, you pretty much summed it up lol.

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More commonly referred to as Direct Thermal Path (DTP), the center pad of the led footprint has no dielectric but is part of the actual metal substrate.

4

I’m still thinking about ordering a 12mm wide man made diamond to put a hot emitter on top of…

5

Kindly give me your advice. :slight_smile:

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You are right, it seems that you have contact with it. SinkPAD have this technology in USA, and we had done a couple of years ago. Recently used in a flashlight is very common.

7

:+1:

As the saying goes, musket to kill a butterfly.

Of course, money can’t buy you happy, imainly depends on your mood…

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Mini heat-pipes… thermal conductivity can be orders of magnitude better then diamond and should allow the LED to be soldered directly onto it if profiled correctly and pressed into a MCPCB.

Another thing to add to the list of things to try.

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The following is the structure of thermoelectric separation MCPCB.

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Practical photos (XHP70)

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Practical photos (DEDOLIGHT)

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I can’t see the pictures you are trying to post. :slight_smile:

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Really? Then how can I do it?

But I can see the picture I sent.

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Try using the “picture” icon (7th from left) at the top of the Comment box. That is all I know to tell you.???

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I do not know why, with your method the results are blank after insert picture. If “Text format” is “Advanced Post Editor”, using the “insert/image” ,it’s ok and I can see it.

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I cant see the pictures either.

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OK ? I just know I can’t see them. Maybe someone who knows why will chime in. :slight_smile:

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Do you know the reason for it？

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How philosophical. :face_with_monocle:

Where they are located (the images themselves)?
Maybe you should try uploading them at some public image hosting, like Imgur.

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[quote=aliang802] Really? Then how can I do it? But I can see the picture I sent. [/quote] Where they are located (the images themselves)? Maybe you should try uploading them at some public image hosting, like Imgur. [/quote]

Image is located in my 360 cloud disk. Curiously, I can see my picture on the forum, but you can't.