20oz pcb

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just saw this on reddit

https://usercontent.irccloud-cdn.com/file/gHochdce/irccloudcapture-1320676838.jpg
https://usercontent.irccloud-cdn.com/file/ZjnBND2U/irccloudcapture-236812244.jpg


-Lasse

Re: 20oz pcb
On Wed, 14 Dec 2016 13:35:00 -0800 (PST), Lasse Langwadt Christensen

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Nice!
        
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Re: 20oz pcb
On 12/14/2016 04:42 PM, Jim Thompson wrote:
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Yeah, but can they do 4/4 mil rules? ;)

Cheers

Phil Hobbs

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Re: 20oz pcb
Den onsdag den 14. december 2016 kl. 22.46.23 UTC+1 skrev Phil Hobbs:
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I wonder how they managed to put solder mask and silkscreen on

it is supposedly 20oz so ~27mil thick copper

Re: 20oz pcb
On 12/14/2016 5:04 PM, Lasse Langwadt Christensen wrote:
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Maybe they took it to an auto body shop... lol

I wonder how they would stack more than 2 layers?

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Rick C

Re: 20oz pcb

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Really thick prepreg between the layers ?





Re: 20oz pcb
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No -- with a typical foil-etch-and-plate process, the width/space rules are  
greater than the thickness.  It really doesn't do you much favor.

Special processes, like Lintek's vacuum metallization, can produce vertical  
sidewalls on the plated metal (there's essentially no undercut because it's  
etched very little: only enough to take off the remaining metallization).

That would require a resist layer (which acts as the "mold" forming the  
copper side) as thick as the deposited metal, though, which I expect has  
some drawbacks.

They claim good results (though they don't give a width/space spec with it)  
up to 100um plating (several oz), with capability up to 500um (i.e., ~20  
thou, about as many oz) presumably with relaxed tolerances at that level.

I think it's funny they're in 'Oz, but don't measure their process in oz.

Tim

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Re: 20oz pcb
On 14/12/2016 21:35, Lasse Langwadt Christensen wrote:
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What would need 20 oz copper ? 1000Amps ?

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Re: 20oz pcb
Den onsdag den 14. december 2016 kl. 23.43.49 UTC+1 skrev TTman:
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from the reddit thread it is DC/DC module for a formulaE car

+/-450V input, 14V@150A and 24V@80A output




Re: 20oz pcb
On Wed, 14 Dec 2016 13:35:00 -0800, Lasse Langwadt Christensen wrote:

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irccloudcapture-1320676838.jpg
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irccloudcapture-236812244.jpg
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Wow.  They got much more definition on the traces than I would have  
expected.  I assume that it's plated up -- I wonder if they plate it up  
and then do something to flatten it out before the solder mask.

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Tim Wescott
Wescott Design Services
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Re: 20oz pcb
On Wed, 14 Dec 2016 13:35:00 -0800 (PST), Lasse Langwadt Christensen

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Looks like they even got 20oz on the thru holes.

Cheers

Re: 20oz pcb
On Wed, 14 Dec 2016 18:48:23 -0500, Martin Riddle

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Why the unsoldered resistors ?

Re: 20oz pcb
On Thursday, December 15, 2016 at 3:51:55 PM UTC-5, boB wrote:
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3. For scale.
2. Zero ohm resistors, made redundant by 20 oz. Cu.
1. Disarrayed, proving that resistance is futile.

Cheers,
James Arthur

Re: 20oz pcb
On Wednesday, December 14, 2016 at 4:35:08 PM UTC-5, Lasse Langwadt Christensen wrote:
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The technology is available up to 200 oz/ft2, it really shines in handling thermally induced stresses, handling huge currents, making planar high power transformers and super efficient heat sinks.

Re: 20oz pcb
Fred Bloggs wrote in message  

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If the traces involve high frequency, perhaps it would be better to use  
something like a 10 layer PCB with 2 oz copper to reduce skin effect.

Paul  


Re: 20oz pcb
On Friday, December 16, 2016 at 12:17:18 AM UTC-5, P E Schoen wrote:
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0676838.jpg
812244.jpg
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The thing with this technology is the whole board doesn't need to be the sa
me copper weight. The people promoting this product envisage controls and s
marts using conventional high density 1 oz on the same board as this heavy  
stuff, which is plated (differentially) and not etched, if I understand the
ir description correctly.

Re: 20oz pcb
On Wed, 14 Dec 2016 13:35:00 -0800 (PST), Lasse Langwadt Christensen

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Proving that you can't just throw copper at a pcb pattern to cover up
a lousy design concept, or change in system voltage.

RL

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