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September 1999

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Subject:
Re: Soldering BGA-352
From:
Jorge Casimiro <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 2 Sep 1999 09:15:06 +0100
Content-Type:
text/plain
Parts/Attachments:
text/plain (76 lines) 
OK, Ioan,

First, i want to know if is necessary to place solder paste or flux/gel  in the BGA's pad's? My Pick & Place machine (Europlacer R.250) don't place BGA's. So, is necessary to place solder paste with my screen printer?
....

I have 12 board's with BGA's. 11 pcb's with one BGA217 and another pcb with one BGA-352 and two BGA-217.

I have a bad soldering underneath. I don't have X-Ray inspection. I have the boundary scan. So my collegue in test give me the open points in the BGA. The alignment of the BGA is maked with the BGA-3000 rework machine.
Another thing, is better to solder the BGA's with convection reflow or infrared.

Thanks,


Jorge Casimiro, EID (Portugal)
Industrial Eng.


----- Original Message ----- 
From: Tempea, Ioan <[log in to unmask]>
To: <[log in to unmask]>
Sent: Quarta-feira, 1 de Setembro de 1999 22:05
Subject: Re: [TN] Soldering BGA-352


> Could you describe the problem Jorge?
> 
> You burn the PCB, you get bad soldering underneath (open, bridge), you
> cannot align the BGA on the pads,...?
> 
> How do you go about the other BGAs?
> 
> 
> > -----Original Message-----
> > From: Jorge Casimiro [SMTP:[log in to unmask]]
> > Sent: Wednesday, September 01, 1999 11:57 AM
> > To:   [log in to unmask]
> > Subject:      [TN] Soldering BGA-352
> >
> > I have a BGA-3000 rework machine from OK Industries and now i have
> > problems to soldering a BGA-352 from Texas Instruments (TMS320C6201).
> >
> > I need help for soldering the BGA-352 with the BGA-3000 or without.
> > Someone have a BGA-3000?
> >
> > Thanks,
> >
> > Jorge Casimiro, EID (Portugal)
> 
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