Electronics Forum: condition and reflow (Page 1 of 81)

Is the condition on your Heller warranty has changed?

Electronics Forum | Tue May 12 21:51:23 EDT 2009 | dynamicsource

I just want to check with you guys, those who have Heller reflow oven and has lifetime warranty if warranty is still lifetime. We were told that warranty for blowers and elements are now just limited to 8 years, though when the machines were bought,

Time and temp in lead and lead-free reflow

Electronics Forum | Tue Jul 29 14:20:03 EDT 2008 | realchunks

Slight variations should have little impact on your product under normal conditions. All depends on your board.

Tg and reflow

Electronics Forum | Fri Dec 16 18:37:10 EST 2005 | mdemos1

Hi. I am trying to understand Tg and how it relates to reflow. With the higher temperatures of lead free, we have been looking toward laminates with a Tg of 180 instead of the current 140. My question is a little more general. In either lead free

Intermetallics and reflow profile

Electronics Forum | Tue May 02 15:29:14 EDT 2000 | M. F. Roe

I am looking for public papers or articles on intermetallic formation as a function of reflow profile. Most solder paste vendors specify peak temperature and time above liquidus, but I am particularly interested in what happens to intermetallic grow

Tg and reflow

Electronics Forum | Mon Dec 19 07:29:30 EST 2005 | jax

Tg is just a way to say when the board goes limp... or a quick way to rank laminates... who cares. For lead free you want to look at Td, Decomposition Temperatures. ( Temp at which the material weight changes by 5% )

Tg and reflow

Electronics Forum | Mon Dec 19 07:49:33 EST 2005 | davef

=330*C is good advice. Search the fine SMTnet Archives for earlier discussions on Td, like http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=32430

Tg and reflow

Electronics Forum | Mon Dec 19 12:21:09 EST 2005 | Amol Kane

from what i know, Tg is important from thermal stresses point of view. board warpage increases greately when Tg is exceed

Re: Standard pad sizes for reflow and wave

Electronics Forum | Fri Sep 03 14:37:45 EDT 1999 | JohnW

We've noticed that there are many different recommendations for pad sizes for various SMT parts. This seems to vary wildly from manufacturer to manufacturer for the same case sizes. Is there any standards that can used used to specify these siz

Re: Standard pad sizes for reflow and wave

Electronics Forum | Mon Sep 06 19:59:59 EDT 1999 | armin

We've noticed that there are many different recommendations for pad sizes for various SMT parts. This seems to vary wildly from manufacturer to manufacturer for the same case sizes. Is there any standards that can used used to specify these s

help with LEDs and reflow

Electronics Forum | Tue Aug 10 11:23:11 EDT 1999 | danielm

We currently have 32 LEDs per board and are looking to change the LED from a gull wing package to another package. (possibly a chip type package). I have heard that some cases and LEDs do not like reflow. This part is not cost effective to have to pu

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