Electronics Forum | Tue Sep 11 22:40:26 EDT 2007 | philip_yam
We are testing SAC paste for thru-hole components in the 2nd reflow process. The solder joint is alright but some problem encountered in FR1 or CAM2 PCB after multiple times of reflow due to the temperature. We are very interested in Zn or Bi-based l
Electronics Forum | Tue Aug 18 17:49:16 EDT 2009 | dyoungquist
Is there a limit to how many times a pcb with components can be run through a reflow oven before the components start to degrade? Example: We load the SMT components on the bottom side of the pcb and run it through the reflow oven. Next we load the
Electronics Forum | Thu Nov 14 12:55:03 EST 2019 | SMTA-Tony
Very late but here's my 2 cents. Will require a custom fixture for every flex or semi-rigid flex. Depending on panel thickness; use 2 tooling hole to fixture on one axis, other tooling holes will have pullers to ensure proper placement. Even with the
Electronics Forum | Fri Aug 21 04:37:26 EDT 2009 | grahamcooper22
Manufacturers of non hermetic SMT components have to test their devices as per IPC JEDEC 20C to check their reflow and moisture sensitivity. In this spec they pass them through reflow 3 times, then check them for damage and retest their performance.
Electronics Forum | Wed Sep 02 19:08:45 EDT 2009 | jlawson
Also consider electroltyics as some brands can only cope with one pass through reflow, 2 max. In Vapor phase 1 pass max is typical. Although depends on makers specs and what they say the device can withstand. main issue is Dielectrics get damaged , c
Electronics Forum | Thu Sep 03 08:39:53 EDT 2009 | markhoch
I'd be more concerned with the pcb itself then I would be with standard SMT components. Are you using a PCB with a high Tg? (170 degrees C or greater)
Electronics Forum | Thu Sep 03 11:38:28 EDT 2009 | dyoungquist
I'd be more concerned with the pcb itself then I > would be with standard SMT components. Are you > using a PCB with a high Tg? (170 degrees C or > greater) The circuit board material is NP-170B (Nan Ya Plastics Corporation). It has a Tg of 170
Electronics Forum | Wed Jan 06 04:51:16 EST 1999 | Earl Moon
| | A question for you all! | | | | Back in the good old days, we didn't always know how clean was clean. Much has changed. Much hasn't. | | | | My question concerns cleaning under, through, and around tight spaces. Way back when, we could not clea
Electronics Forum | Tue Oct 12 17:40:01 EDT 1999 | Brian W.
| | | A question for you all! | | | | | | Back in the good old days, we didn't always know how clean was clean. Much has changed. Much hasn't. | | | | | | My question concerns cleaning under, through, and around tight spaces. Way back when, we coul
Electronics Forum | Tue Jan 05 20:29:32 EST 1999 | Steve Gregory
| A question for you all! | | Back in the good old days, we didn't always know how clean was clean. Much has changed. Much hasn't. | | My question concerns cleaning under, through, and around tight spaces. Way back when, we could not clean under 20
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