Jim,


Thanks for your input, but i think that this technique of solder sucker is
not possible. The sucker will take all the solder, not only that between the
pins.


Best Regards,

S.-

----- Original Message -----
From: Jim <jvpoll@DALLAS.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, December 19, 2001 11:40 AM
Subject: Re: [EE]: Manually soldering of a LQFP package.-


| I was able to solder some .5 mm pitch pins
| on a small HiRose connector by using regular
| solder - which will flood/solder multiple
| pins - then through the use of a solder
| sucker "remove" the excess. I had to be
| careful so as not to dislodge traces or
| accidently 'hit' the connector's pins while
| doing this (I used one of the hand-held
| spring-loaded trigger actuated solder
| suckers).
|
| I have no experience with solder paste and
| heat guns - so that technique may be a *more*
| suitable approach with as large a device
| as you have to solder in.
|
| Jim
|
|
| ----- Original Message -----
| From: "Sebastian Garcia" <sgarcia@FI.UBA.AR>
| To: <PICLIST@MITVMA.MIT.EDU>
| Sent: Tuesday, December 18, 2001 6:24 PM
| Subject: [EE]: Manually soldering of a LQFP package.-
|
|
| > Hi there!
| >
| >
| > I will appreciate any help from an experienced lister about techniques
for
| > manual soldering this kind of chip.
| > I got experience on manual soldering of some types of SMD IC's (using
| > Chem-Wik rosin), but this one has a *very little* space between pins.
| >
| > The mechanical specs are:
| >
| > * Package: 144 pin (4x36 pin) LQFP (Low-profile QFP)
| > * Distance between center of pins: 0.5 mm.
| > * Pin width: 0.17 mm.
| >
| >
| > Probably it can be done using flux or solder paste, but i have no
detailed
| > idea about application of these techniques.
| >
| > And yes, the chip is available only with this package...
| >
| >
| > Best Regards,
| >
| > S.-
| >
|
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