----- Original Message -----
From: "Brenden McNeil" <moya034@gmail.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Sunday, February 20, 2005 11:21 AM
Subject: Re: [EE] Request: SMT Soldering techniques?


> What about reflow work?  either with an oven of some sort or hot air
device?

main point is flux must exist. using flux-pen or powder of rosin
should be both ok.....BUT STILL, clean old tin with my "soderwick"
(hand held vaccum desolder gun), then redo, is best way.
hot air gun will disturb many other things (including
to damage pcb), I believe they are for take off and are not for sold on.

flux pen, causing corrosion is not acceptible. sold wick cause
alegy to me and it real smell strange.


>
>
> On Sun, 20 Feb 2005 10:03:09 -0500, microsoftwarecontrol
> <microsoftwarecontrol@yahoo.ca> wrote:
> > In my case, solding iron is most decisive:
> > T very low, 195 and never swinging above 200.
> > To sold two pins each time with ensured flux
> > covering. Tin of two pins will sepreate by themself.
> > Such, like doubling the size of pin. Low temperature
> > to ensure flux existed, is key! How to achieved eccurately
> > countrolled temperature? My own pid control iron!
> >
> > Also, using 0.5mm solder, bring more flux to make
> > easy seperation of two pins. If solding time too long and lack of
> > flux cover, clean all old tin, redo.
> >
> >
> > ----- Original Message -----
> > From: "csb" <csblondin@sympatico.ca>
> > To: "Microcontroller discussion list - Public." <piclist@mit.edu>
> > Sent: Sunday, February 20, 2005 9:15 AM
> > Subject: Re: [EE] Request: SMT Soldering techniques?
> >
> > > > consider myself very good with soldering but have never attempted
SMT.
> > > Then you'll have no problem with SMTs once you get a bit of practice.
> > >
> > > > What equipment is required to start out?
> > > I'd say: (cause that's what I use)
> > > two hands
> > > a soldering iron
> > > a reasonably clean tip (doesn't need to be small)
> > > flux
> > > 63/37 flux-core solder
> > > probably a magnifying glass/lamp combo, best is a binocular
microscope.
> > > If you only do some 0603, you won't need those lenses except maybe a
few
> > > times to really see what's happenning. But if you want to do any kind
> > > of SMD ICs (TSSOP, PQFP, TQPF, whateverQFP) that have a lead pitch <
0.05"
> > > you Will need an optical device.
> > > > What techniques and skill does one need?
> > > You should read the doc suggested by Jinx, and read anything you can
> > > find on-line. I don't know about books, but you might check out some
> > > App-notes from manufacturers. I don't have any in mind right now, but
> > > you might check out TI, NationalSemi, Fairchild Semi, maybe (?)
Panasonic
> > > (the Panasonic/ECG division which makes discretes).
> > >
> > > Best of all, of course, is to practice.
> > >
> > > Good Luck,
> > > Christian
> > >
> > > --
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>
>
> --
> Brenden McNeil
> moya034@gmail.com
> WWW is Deprecated (no-www.org)
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