[Work in progess] Burnins Avalon Chip to mining board service - page 135.

FullFathom5

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Hopefully the power requirements for 450MHz clocking is being considered for both forms of the board?

Quote from: Schrankwand on June 30, 2013, 09:10:28 AM

Quote from: sprint347 on June 30, 2013, 08:54:03 AM

burnin the XX model is looking great, is the X version coming along?

My personal guess is that he will use the same PCBs but only put 10 chips. Controller will then try to run both lines, fail and only run one stack of chips. That would cut development costs and he would get cheaper PCBs.

Schrankwand

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Quote from: sprint347 on June 30, 2013, 08:54:03 AM

burnin the XX model is looking great, is the X version coming along?

My personal guess is that he will use the same PCBs but only put 10 chips. Controller will then try to run both lines, fail and only run one stack of chips. That would cut development costs and he would get cheaper PCBs.

sprint347

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burnin the XX model is looking great, is the X version coming along?

bezzeb

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Quote from: SebastianJu on June 29, 2013, 06:01:03 AM

Ok. So after all the chips are soldered you have to take away the solder mask so that the heatsink can get in contact with the copper?

Judging from the earlier photo of the backside (new meaning to sexy backsides!) and what I know of thermal vias + surface mount components:

I'd say he's made sure that all through hole components are away from the Avalon chips and signal traces are on internal layers which means the entire bottom plane can just be sandwiched against a heat sink with perhaps some thermal tape or paste using the 6 provisioned fixing holes.

Clever, simple and reliable, and there's so much surface area that i don't think the solder mask will interfere enough to matter. Regardless, I cant wait until he takes my money so i can get me some....

For those interested in learning more about this (now fairly standard) technique, some links for edjamucation:
http://www.electronicproducts.com/Thermal_Management/Heat_Sinks_and_Thermal_Materials/PCB-cooling_techniques_and_strategies_for_IC_packages.aspx
http://www.electronics-cooling.com/2004/08/thermal-vias-a-packaging-engineers-best-friend/

And Burnin, your photos plus the wicked video of that cobra P&P are sooo much better than porn...
Great stuff....

Foofighter

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BTC Mining Hardware, Trading and more

Quote from: WynX on June 29, 2013, 06:33:55 AM

Mean pick&place machine indeed: http://youtu.be/S8qkaTsr2_o?t=8s
So production is gonna be done on the Cobra? Impressive 01005 size...

impressive working speed!

WynX

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Mean pick&place machine indeed: http://youtu.be/S8qkaTsr2_o?t=8s
So production is gonna be done on the Cobra? Impressive 01005 size...

Schrankwand

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Btw Burnin: Great photo Op. Most people fuck up product placement pics, these are great.

SebastianJu

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Legendary Escrow Service - Tip Jar in Profile

Quote from: fasmax on June 28, 2013, 07:21:12 PM

Quote from: SebastianJu on June 28, 2013, 06:31:57 PM

Great update burnin!

Quote from: fasmax on June 28, 2013, 06:18:42 PM

The holes are copper plated and conduct heat to the backside of the board where the heatsink will be placed.
I am just wondering if it would be better to have no solder mask directly under the ASIC chips heatsink side of board.

But i dont see any copper at the heatsink side of the pcb. How should the heat be transported to the heatsink? Is the thermal compound thought to fill in the holes, and find the way to the copper and find contact to the heatsink this way? I thought it would be better to have as much metal as possible transport the way from the chip to the heatsink and having a good contact with the heatsink.
Im not a tech guy so i wonder...

I am fairly sure that most of the back side is copper ground but it is covered with solder mask.
If you were to scratch the back with something sharp you would see the copper.

Ok. So after all the chips are soldered you have to take away the solder mask so that the heatsink can get in contact with the copper?

dudeofthestick

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culexevilman

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Bitcoin is too valuable to be used as a currency

Awesome man, keep it up...!

Bicknellski

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AMAZEBALLS!!!!!!!!!!!!!!

vanycon

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In Rarity I trust!

Aaand we have a brand new pornostar: bitburner XX :'D

tiros

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Just another miner

Quote from: burnin on June 28, 2013, 06:22:09 PM

Be careful what you wish for, it might become true.

I am literally DEAD now, I need sleep.
But the first tests show all power supplies working as expected, no magic smoke escaping, and thats what electronics is all about.

<--------is speechless Cheesy

Foofighter

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BTC Mining Hardware, Trading and more

nice! You have earned some sleep now mate!

Grinny

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Alter Haudegen! (lit. "warhorse")

mtbitcoin

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Etherscan.io

Sweet

g83

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Super Smash Bros. Ultimate Available Now!

Ahhhhhhhh how cool is that

cant wait for the chips to be delivered

Aggrophobia

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fasmax

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Quote from: SebastianJu on June 28, 2013, 06:31:57 PM

Great update burnin!

Quote from: fasmax on June 28, 2013, 06:18:42 PM

The holes are copper plated and conduct heat to the backside of the board where the heatsink will be placed.
I am just wondering if it would be better to have no solder mask directly under the ASIC chips heatsink side of board.

But i dont see any copper at the heatsink side of the pcb. How should the heat be transported to the heatsink? Is the thermal compound thought to fill in the holes, and find the way to the copper and find contact to the heatsink this way? I thought it would be better to have as much metal as possible transport the way from the chip to the heatsink and having a good contact with the heatsink.
Im not a tech guy so i wonder...

I am fairly sure that most of the back side is copper ground but it is covered with solder mask.
If you were to scratch the back with something sharp you would see the copper.

RoadStress

legendary

Activity: 1904

Merit: 1007

Quote from: chanberg on June 28, 2013, 06:24:54 PM

SICK update!!!

+1! And the color is just Shocked

Topic: [Work in progess] Burnins Avalon Chip to mining board service - page 135. (Read 624197 times)