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Subject: Re: [Homebrew_PCBs] Re: Exposed pads

From: Dennis Shelgren <nojoeco@...>
Date: 2016-08-28

Heat guns can work if you are very careful. Ignore Youtube, use a test piece and measure the correct height away for the temperature you need and watch how long you heat if for.


On Aug 28, 2016 8:41 AM, "alienrelics@... [Homebrew_PCBs]" <Homebrew_PCBs@yahoogroups.com> wrote:
 

I think you mean "solder", not "weld".


You mean the metal square on the bottom of some surface mount ICs. Yes, that can be difficult without a soldering oven.

Are you making your own PCBs? If not, you should have a lot of solder vias (plated through holes) under the exposed pad. I find I can solder these with a temperature controlled iron and a lot of liquid flux. If you only add solder to one hole, you can see when the solder flows and coats by looking in the other holes.


Of course, solder this after soldering the leads down.


Steve Greenfield AE7HD



---In Homebrew_PCBs@yahoogroups.com, <iz5fcy@...> wrote :

Hi to all,
as we possible to weld the exposed pads IC, not having an oven?

Thanks in advance,

IZ5FCY Roberto