Kerui Electronic Industrial DTP copper mcpcb

While it refers to older Epistar type leds it is still dtp.
Direct thermal path patent

Dated 2000 :smiley:

Cheers David

If I am not mistaken, that patent refers to a different technology where a hole is actually cut into the PCB.

That differs from building up a copper pad on a copper (or aluminum) core PCB. Subtle, but different.

There were a lot of related but different solutions in the early days of LEDs and PCBs including inserting copper slugs into a whole in the PCB, direct PCB onto heatsink, etc.

This is one of the early patents on the PCB: US6711812B1 - Method of making metal core substrate printed circuit wiring board enabling thermally enhanced ball grid array (BGA) packages - Google Patents This particular one using bias, which is pretty narrowly written which would allow easy ways around it.

You are right, in that one the led slug goes down to the heat sink, on a modern one the heat sink is built up to the slug, in other words there is a hole cut in the dielectric layer just the same as there was a hole cut in the pcb :wink:
I know that as far as patents are concerned that could be enough to give out a new patent, however this company is making claims that they developed direct thermal transfer and patented it in 2008, the patent I linked to shows that dtp was developed well before that.
Snipped from the OP

If they had just come onto the forum saying as a manufacturer they are willing to sell small numbers to us directly with proper info on their products not just saying “Email us and we will tell you”, no data, no prices :confounded: I would of been at the least curious, but when someone wants to sell something without showing it, it is called buying a pig in a poke.

Cheers David

Explanation,in medieval times a poke was a bag and “buying a pig in a poke” means buying unseen, many a person got home to find that they had bought a cat/dog when they opened the bag :open_mouth:

Since they manufacture to order maybe they are just showing the kinds of things they can do rather than things they have done. They really should only post advertising pictures of their own work though, don’t know which is which now. I like the wide traces.

1 Thank

HI all,

I’m not really sure of anything that happened with the picture of marks MCPCB, but here is my 2 cents.

I have contacted Sundy via email to inquire about getting samples. When I did I asked about all the sizes we typically use here 20mm 16mm etc. I also asked if they made a triple XML board ( like Sinkpad, Cutter electronics and sevral other makers do), and linked Marks website as an example. I was told they did not stock this size board but would be glad to manufacture one. I’m not sure if that has anything to do with the picture that was posted, but I thought it might so I mentioned it. Perhaps they were offering to make this “type” of MCPCB?

As I said I am working on order a sample pack of several boards offered by the company. If they turn out to be true DTP boards, and the prices are reasonable I may do either a GB or a bulk purchase on my own.

My 2 cents :slight_smile:

Our company many Direct Thermal Path copper mcpcb orders according customs engineering drawing to make,
sometimes,we also put forward our opinion about drawing,if customs have need,we also can design DTP mcpcb
MCPCB according to customer requirements.

If they said this they are 100% cheaters.
All layers of boards are making in one big flat area and cutting (milling) small pcbs from it is the last operation.
There is no way to have 16-20mm preparated washers and then make DTP MCPCB from them with custom design by request.

I think you misunderstood. I don’t see anywhere that they said they had prepared boards or blanks to make DTP MCPCB from them. They claimed to be able to manufacture any size or shape of MCPCB, because they are a PCB manufacturer.

Yes, seem that I am wrong.
But anyway we need to see real photos. Those that are posted here are stolen from various websites and shows pbs made within different technologies.

I am trying ATM to have them make a limited number of boards for Nichia 119, which are non-DTP btw. But if the order goes through, they will send a few DTP-XP board with the order to try them out.

Maybe many people doubt me,but you can see our company website: http://www.e-cer.com.
And my email also enterprise email.

Hi Jos

How about the Nichia 119 copper mcpcb, if you also have any problem please tell me?yes if the orders goes through,
we will send a few free DTP copper for you testing.

Best wishes
Sundy

DTP copper mcpcb testing report

ShenZhen KeRui Electronic Industrial Co., LTD
Copper substrate performance parameters form
Copper Substrate Model KR-CU-350W Product name Copper radiator panel
Performance parameter Unit Test value Test Method
Peel strength N/mm 2.2 GJB1651 - 4010
Surface resistance MΩ 1×(10^6) GJB1651 - 5020
Volume resistance MΩ.m 3.2×(10^7) GJB1651 - 5020
Breakdown voltage KV/min 1.0 GJB1651 - 5040
Dielectric constant - 3.0 (40℃,93%,96h)
Dip soldering of resistance ℃
260℃ 3min
No bubble, no
stratification
GJB1651 - 4010
Flammability - FV-0 GB/T4722 - 17
LED Solid crystal area with
the substrate conduction of
thermal conductivity
W/m.k- ≥350
Long-term use temperature ℃ ≤110 (40℃,93%,1Y)
The thermal conductivity of
the metal matrix W/m.k- ≥350

The google translater is killing.

This is our company direct thermal path copper mcpcb testing report.

Can you list what size MCPB you currently make?

Can you list what LEDs the MCPBs currently work with?

Thanks!

Hi

We currently make DTP copper mcpcb many,any size have,We customize and design MCPCB according to customer requirements.
Sometimes,we made some standard DTP copper mcpcb,such as 10mm,16mm ,20mm,31.6mm with cree xml and xhp50 xhp 70.

Thank you
Sundy

leo ou

It would be great for you/and us if you consider producing a NON DTP( thats a must) copper XBD 16mm copper pcb- there isnt such pcb awailable at the market and those IR Oslons badly need one :wink:

yes,if you need,we can make copper mcpcb for you.

Thanks
Sundy