Homebrew PCBs

Hi all,

I am looking at a board that will have a couple SMD chips and a PIC 
on a plate.

I call them chip carriers, aka sockets.

anyway, unlike a standard DIP chip, they have plastic frame that 
extends past the leads so they cannot be soldered easily.

On my double sidded boards, I can solder both sides for most things 
like resistors and such that need the connections, but on these it's 
a pain.

can I use the same solder paste for surface mount devices to get a 
solid contact on these parts ?

I've been lucky enought to get less than 5 via's by moving things 
around a lot.

Dave

I'm not sure how this looks like what you have.
I might have seen it once on harddisks (but thought the plastic is 
removeable.
or is it the type with the small pcb extending to all sides?


try reflow (with hot air or oven).
any solder paste forms the right joins due to surface tension.
i would tin the pcb, just to be sure, before soldering.

(can you look under the plastic? you have to look for shorts.)
try to get some spare parts/pcbs and practice to get the right amount of 
paste.

i think the only method for this is reflow... i think the reflow b(all) 
g(rid)a(rray) also? or not?

st

moving thinks works nearly always. the autoplacer/autorouter are poor (the 
ones i have seen).
but it takes time... i can't just leave it how the autorouter does it. i 
need some "art" here. even if it is only a one time disposeable board.



On Sun, 05 Oct 2003 14:12:02 -0000, Dave Mucha <dave_mucha@...> 
wrote:

> Hi all,
>
> I am looking at a board that will have a couple SMD chips and a PIC on a 
> plate.
>
> I call them chip carriers, aka sockets.
>
> anyway, unlike a standard DIP chip, they have plastic frame that extends 
> past the leads so they cannot be soldered easily.
>
> On my double sidded boards, I can solder both sides for most things like 
> resistors and such that need the connections, but on these it's a pain.
>
> can I use the same solder paste for surface mount devices to get a solid 
> contact on these parts ?
>
> I've been lucky enought to get less than 5 via's by moving things around 
> a lot.
>
> Dave
>
>
>
>