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August 1998

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Subject:
From:
Jack Crawford <[log in to unmask]>
Reply To:
"TechNet E-Mail Forum." <[log in to unmask]>, Jack Crawford" <[log in to unmask]>
Date:
Sun, 16 Aug 1998 17:23:51 -0500
Content-Type:
text/plain
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text/plain (83 lines)
Info to all:  IPC and JEDEC, joint developers of ANSI/J-STD-020 are in the final
balloting stage of J-STD-020A.  Contact me OFF NET if you would like to receive an
e-mailed copy of this interim final document in Adobe Acrobat .pdf format.

IPC/SMTA Electronics Assembly Expo
Technical Committee Meetings, Conference, Exhibits
Providence RI   October 24-29
More info at http://www.ipc.org

Jack Crawford, IPC Project Manager - Assembly
2215 Sanders Road, Northbrook IL  60062-6135
[log in to unmask]      847-509-9700 x 393     fax 847-509-9798

>>> ETS <[log in to unmask]> 08/14/98 12:00PM >>>
Technet,

After recieving a copy of the Jedec Standard, J-STD-020, I have a question
that hopefully one of you might answer. The Convection Reflow profile
requirement is listed as:

Ramp up rate: +6 degrees C/sec. max
Temperature maintained at 125 degrees C (+/-25): 120 seconds maximum
Temperature maintained above 183 degrees C: 120 - 180 seconds
Time at maximum temperature: 10 - 40 degrees C
Maximum temperature: 220 degrees C (+5/-0)
Ramp down rate -6 degrees C/sec max

My question is when figuring the time maintained at 125 degrees should one
only be counting the time actually maintained at 125 degrees or should I
include time between 100 and 150 degrees C?

Thanks,

Brian



ETS, LLC - West                      ETS, Inc. - East
3939 N. Freya St.                    PO Box 47887
Spokane, WA 99207                    Plymouth, MN 55447
509-483-0900 (voice)                 612-553-0051 (voice)
509-483-0331 (fax)                   612-553-0246 (fax)
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