TECHNET Archives

June 2000

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Tony DiMauro <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 8 Jun 2000 09:38:24 -0700
Content-Type:
text/plain
Parts/Attachments:
text/plain (126 lines)
Barry,

Although I have not done a lot of wave and reflow oven
profiling there are two other systems to consider. One
is Datapaq and the is Kic. I use a datapaq for BGA
profiling and I find it and it software to meet my
needs.

As far profiling wave and reflow a few things to
consider are:

Leading and trailing edges.

Uniformity of heat across the circuit(s).

Max temps for the assorted device (typically 210C
+/-).

Thermal Couple placement - critical devices (high pin
count - BGA's); heavily populated area (leading and
trailing edges).

As far as tooling:

Based on the complexity of the technology of the
circuits your building you may want to consider using
pallets, finger guards etc. I am not sure of the name
of pallet mfg. some one else reading this may.

Time vs Temp:

Profiling in a nut shell is the achieving a
temperature of +183C for about 30 to 60 across the
circuit. The dwell time will vary depending on the
circuit. The 30 to 60 second margin is what I use for
BGA repairs.

Fluxes and chemistries:

Things to consider are spray versus bubble fluxers.

No Clean versus RMA solder and fluxes.

Addreses    www.datapaq.com

            www.kicthermal.com

Hope this helps,

Tony Di Mauro

Circuit Technology Center
Haverhill, MA

--- Lee Whiteman <[log in to unmask]> wrote:
> Barry Gallegos,
>
> You may want to check out ECD's website on their
> MOLE. The MOLE is used to
> capture thermal profile's. ECD's website is:
> http://www.ecd.com/emfg/instruments/mole/.
>
> For more information, you may want to check out SMT
> Magazine's website on
> soldering. Their website is:
> http://www.smtmag.com/Step-by-StepSMT/Step7.html.
>
> I can provide additional information directly to
> you, so you can learn this
> "art". Give me a call with your telephone number,
> fax number, and E-Mail, so
> I can get this data to you.
>
> Lee Whiteman
> Senior Manufacturing Engineer
> ACI / EMPF
> Telephone: (610) 362-1200; Ext. 208
> FAX: (610) 362-1290
> E-Mail: [log in to unmask]
>
>     -----Original Message-----
>     From: TechNet [mailto:[log in to unmask]]On Behalf
> Of Barry Gallegos
>     Sent: Tuesday, June 06, 2000 5:50 PM
>     To: [log in to unmask]
>     Subject: [TN] Thermal Profiling
>
>
>     Once Again, (if I may)
>
>
>
>     I am attempting to learn how to profile both
> wave and reflow. I have
> absolutely no experience.
>
>
>
>     Please where can I go to lean this art.
>
>
>
>     Barry Gallegos.
>
>


__________________________________________________
Do You Yahoo!?
Yahoo! Photos -- now, 100 FREE prints!
http://photos.yahoo.com

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Keach Sasamori at [log in to unmask] or
847-509-9700 ext.5315
##############################################################

ATOM RSS1 RSS2