Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: [Homebrew_PCBs] Soldering a LQFP 48 on a home made PCB

From: Dylan Smith <dyls@...>
Date: 2014-11-07

I find that it makes no difference and trying to apply to the pads only is a frustrating waste of time.
I just use a flux pen and draw over all the pads.

I also use kapton tape to hold the IC down for soldering rather than trying to tack corners down. You can stick the tape to the top of the IC and hold the tape to align and once the pins are nicely all on their pads, press the tape down onto the PCB. Then just drag solder the two exposed sides, remove the tape, and solder the remaining two sides.

On 07/11/2014 09:12, Phil Quinton phil.quinton@... [Homebrew_PCBs] wrote:
James,

Thanks for the reply.

Do I need to keep the flux just on the pads ( appears fiddly ), or can I just apply to the whole of the pads as a "square" of flux?

Am I correct in thinking that the latter would end up with more solder bridges due to the solder flowing between the pins due to the flux being between the pins?