Mime-Version: |
1.0 |
Sender: |
|
Subject: |
|
From: |
|
Date: |
Tue, 22 Sep 1998 11:15:37 -0400 |
Content-type: |
text/plain; charset=us-ascii |
X-To: |
|
Reply-To: |
|
Parts/Attachments: |
|
|
Jim,
Both your normal 250F bake and their 275F bake are Band-Aids to the bareboard
manufacturers process problems.
From a hands-on prospective, I have not pre-baked in over 5 years for both
reflow and wave solder. I've baked boards with known problems (per other boards
in manufactures datecode & lot), and still delaminated - even at their
prescribed 275F bake.
Eliminate your bake - you'll: reduce standard hours and cycle time, reduce
missing / loose parts (less handling); improve solderability, and improve
reliability (for any heat-sensitive components).
If all else fails, sing "Bad Boards, Bad Boards, what you gonna due . . " to the
"Bad Boys, Bad Boys" theme from "COPS".
Good luck,
Al
################################################################
TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################
|
|
|