Anyone does not have a copy of the existing specification for this
discussion here is a link:

http://www.jedec.org/download/search/jstd020b.pdf

Kind regards,

John Burke

-----Original Message-----
From: McCullen, Jack T [mailto:[log in to unmask]]
Sent: Wednesday, July 14, 2004 11:06 AM
To: [log in to unmask]
Subject: Re: [LF] Question on maximum reflow temperature in Jedec
Standard - J-STD-020B


Greg,

J-STD-020C uses a table to indicate the maximum reflow temperature.  The
table is based on package volume and package thickness.  The standard is
approved and is in the publication process and will be available
shortly.

Regards,
Jack McCullen

Package
Thickness                       (Volume mm3 < 350)      (Volume mm3 350
- 2000)     (Volume mm3 > 2000)
< 1.6 mm                                260
260                             260
1.6 mm - 2.5 mm                 260                             250
245
> 2.5 mm                                250
245                                     245

* Tolerance: The device manufacturer/supplier shall assure process
compatibility up to and including the stated classification temperature
(this means Peak reflow temperature +0 C. For example 260 C +0C) at the
rated MSL level.


-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Greg Kowal
Sent: Wednesday, July 14, 2004 10:31 AM
To: [log in to unmask]
Subject: [LF] Question on maximum reflow temperature in Jedec Standard -
J-STD-020B

Hello all,

The current standard has for pb-free large body a maximum reflow of
245C.  I believe there was some discussion this would be revised to be
a maximum reflow temperature of 260C.  Can anyone verify if this is
really the case and if so, when should we expect the revision to occur?


Regards,

Greg Kowal

p.s. I have been a "lurker" here for a while and have learned a lot.
Thank you to everyone who contributes.



______________________________________________________________________
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