Sender: |
|
X-To: |
|
Date: |
Tue, 13 Feb 2007 06:54:02 -0700 |
Reply-To: |
|
Subject: |
|
From: |
|
Content-Transfer-Encoding: |
quoted-printable |
In-Reply-To: |
|
Content-Type: |
text/plain; charset="us-ascii" |
MIME-Version: |
1.0 |
Parts/Attachments: |
|
|
And you thought it was another half-baked idea of his.
Dewey
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Tuesday, February 13, 2007 6:33 AM
To: [log in to unmask]
Subject: Re: [TN] FW: Report from a BGA
I learn something new from you every time you contribute to this forum,
Werner. Thank you. This explains a lot.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Werner Engelmaier
Sent: Tuesday, February 13, 2007 7:24 AM
To: [log in to unmask]
Subject: Re: [TN] FW: Report from a BGA
Hi Richard,
"Fully Convective" reflow ovens are a misnomer. Depending on the zone
temperature, up to 20% of the heat transfer in these 'Convection Reflow
Ovens' is actually by near infrared radiation. Now the wavelength of
this IR is quite different than the wavelengths of the old quartz lamp
ovens where the radiation comes from much higher lamp temperatures,
however, the platens with all the hoes through which the hot gas flows
into the convection reflow ovens also radiate.
Werner
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e To
unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or
(re-start) delivery of Technet send e-mail to [log in to unmask]: SET
Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the
posts: send e-mail to [log in to unmask]: SET Technet Digest Search the
archives of previous posts at: http://listserv.ipc.org/archives Please
visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for
additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
|
|