Steve,
we are soldering tons of these every day, with no issue. And they do not skew, maybe because the design has the middle pad (centering board). They wet properly, but I am only talking of commercial grade products that only see burn-in.
And an NTC solution for your problem, if you want them on the board after HASS, solder them manually after HASS...
Regards,
Ioan
> -----Original Message-----
> From: TechNet [SMTP:[log in to unmask]] On Behalf Of Stephen Gregory
> Sent: Wednesday, April 06, 2005 9:56 AM
> To: [log in to unmask]
> Subject: [TN]
>
> Morning Everyone!
>
> I just ran an assembly here that has some strange little right angle LED's
> that I've never seen before. They were brought to my attention because
> many of them were coming out of reflow pretty badly skewed. I've got a
> few images of the LED at; http://www.stevezeva.homestead.com
>
> Look at "LED Top, LED Bottom, LED Pad Layout, and Recommended
> Layout".
>
> For one thing, you'll see that these LED's have no real termination to
> solder to, except on the face of the ends. Another thing I discovered after
> I went and checked the dimensions of the pad layout in the gerbers, then
> compared it with the manufacturers recommendation, the layout isn't even
> close to what's recommended.
>
> My question is, what would you do to try and protect what little solder
> joint
> that is going to form, from being damaged? Some sort of glue bonding?
>
> These little guys will need to withstand HASS testing in the upper-level
> assembly believe it or not. But I'm not holding out much hope for that.
>
> Kind regards,
>
> -Steve Gregory-
> Senior Process Engineer
> LaBarge Incorporated
> Tulsa, Oklahoma
> (918) 459-2285
> (918) 459-2350 FAX
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