Identify this PCB type?

[jungleb0y]

Okay so I have seen this look of PBC before some thick some thin and I'm just wondering what it is... I'm curious as to the golden areas with all the little holes are they just using that as a type of heat sink? Does it have a special name?

http://www.asiansignals.com/getdoc/9832f3d7-dc63-47bc-a4f4-0c59d97d71ca/RebelBoard48-jpg.aspx

 

[jungleb0y]

Is this a mystery?

 

[usLEDsupply]

i believe they are for a heat sink
the small holes allow solder or a conductive paste to better pass the heat from the led's to the bottom side of the board where heat sinks are mounted.
i have seen it on some boards for cree xr-e's we were working on once
either way that is an interesting board it looks like a test or demo board as i don't think anyone would use fans in an led app due to there short lifespan

 

[sigsour]

The coating is gold over nickel. ENIG- Electroless Nickel/Immersion Gold
A very thin layer of gold provides a coplanar surface and is RoHs compliant.

 

[LumenHound]

It's just a double sided plated through board with gold plating and single layer circuitry.

The golden areas with the little holes are where the 4 rebels per area get mounted. The holes are called vias and their role is to act as a pathway for heat to travel along. The walls of those holes are copper with gold plate and they conduct heat. On this board these vias would move the heat from the rebels to the back of the board. There would be some type of heatsink array mounted to the back of the board and the 4 fans would facilitate air movement either through or around the heatsinks.

The larger pair of holes by each quad rebel area are where the bolts for the heatsinks go. The single large hole near each of the 16 driver chips would be for mounting the driver heatsinks to the rear of the board.

 

[jungleb0y]

sweet thanks for the responses