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January 2009

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Subject:
From:
Steve Gregory <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Steve Gregory <[log in to unmask]>
Date:
Tue, 6 Jan 2009 13:30:49 -0600
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text/plain
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Hi Eli!

I have a couple of questions; you say that you measure *almost* the same
temperature on the top and bottom, how much is almost?

My second question is; why would you only want to use the topside
heaters?

Steve 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Eli Sarig
Sent: Tuesday, January 06, 2009 1:16 PM
To: [log in to unmask]
Subject: [TN] Question about bottom heaters of reflow oven

Hi all,

My question is related to the necessity of down heaters in the reflow
oven.
When we solder double sided boards, we *can* create a suitable reflow
profile using *only* the top heaters of the oven.
In that case, the bottom heaters remain at room temperature. We measure
almost the same temperature on top and bottom of the board.
Are there any limitations or problems that might happen using this kind
of process?

Thanks,

Eli.

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