[PEDA] Thermal Impedance of Copper Areas

[don@led.com.au]

DUTTON Phil wrote:
> these soldier filled holes would be called 'foxholes' then?....
> (sorry, couldn't resist)<<

Is that the 'soldier resist' layer to which you are referring?  ;-)

Cheers

Don

> 
> regards,
> Phil D.
> -----Original Message-----
> From: PEDA-bounces at techservinc.com
> [mailto:PEDA-bounces at techservinc.com]On Behalf Of Brian Guralnick
> Sent: Sunday, 30 July 2006 11:26 AM
> To: Protel EDA Discussion List
> Subject: Re: [PEDA] Thermal Impedance of Copper Areas
> 
> 
> The soldier filled holes act as a thermal conductor.  The idea is to
> draw 
> heat away from the component, spreading it out more efficiently to the
> rest 
> of the PCB.
> 
> ____________
> Brian G.
> 
> 
> ----- Original Message ----- 
> From: "Gerhard Fiedler" <gelists at gmail.com>
> To: "Protel EDA Discussion List" <PEDA at techservinc.com>
> Sent: Saturday, July 29, 2006 2:39 PM
> Subject: Re: [PEDA] Thermal Impedance of Copper Areas
> 
> 
> 
>>On 2006-07-28 13:32:24, you wrote:
>>
>>
>>>If you are trying to get that last little bit of extra thermal
> 
> cooling, 
> 
>>>if
>>>your PCB has multiple layers, flood fill the layers under the
> 
> component 
> 
>>>with
>>>coper.  Also, if you can add a grid of pads around the component
> 
> which 
> 
>>>may
>>>be waved/filled with soldier, this can also help.
>>
>>Couldn't it be that open holes (not filled with solder) are effective,
> 
> too
> 
>>-- in horizontal PCBs? They'd possibly create some additional
> 
> convection.
> 
>>Gerhard
>>
>>
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