Homebrew PCBs

Around May 11 there was a thread "via's using homemade boards" - I  
think the apostrophe might have thrown your searches off. There was  
this post:


	From: 	derekhawkins <eldata@...>
	Subject: 	[Homebrew_PCBs] Re: via's using homemade boards.

 > What have you used that works, besides through hole plating?

Pressed fit header pins work best, especially for hidden vias. For the  
latter, you need to use flux on the tip of the pins after they are  
pressed flush with the board beneath where the component will go.

Cut the pin at the other side, it's the chamfered geometry of the  
uncut tip of the pin that allows a good joint with so little exposed  
solder. Also, because these pins are square and the hole is round,  
solder will wick below the board's surface which tends to reinforce  
the joint.

http://www.pbase.com/eldata/image/65408722
http://www.pbase.com/eldata/image/65448015



HTH
PG


On 02/09/2009, at 1:39 PM, blue_eagle74 wrote:

> I cant find it, but someone talked about using componet lead,  
> resistor maybe, for vias and soldering each side to make for a low  
> profile via. I have tried this and didn't get good results.
>
> Something like insert the lead and solder it on one side and snip if  
> off on the other side and solder it. I did this and got larger  
> solder deposits than using flat trace repair copper strips.
>
> Is there any other clever ideas for vias? My target chip is the QFP.
> Making plated through hole is too complated right now.
>
> Brian
>
>