Electronics Forum | Wed Jul 21 11:12:05 EDT 2010 | remullis
I have some 13" long boards that warp considerably during first pass through reflow (no center support), what I've done to improve this type of warpage is stiffeners along the front and back edge. This may help with twisted boards as well.
Electronics Forum | Fri Oct 01 13:09:18 EDT 2010 | clampron
Good Afternoon, How is the stiffener adheared? If it is laminated to the flex, it may help you with the surface planarity through reflow. If it put on with PSA, it may cause more problems then it would solve. PSA gets soft through the reflow. It may
Electronics Forum | Thu Jul 23 13:44:50 EDT 2020 | dwl
I used to have the same issue with reed switches on one product we ran. Same oven too. We ended up rigging up an "umbrella" with two titanium stiffeners and bare PCB as the roof. It was hokey but it worked.
Electronics Forum | Mon Sep 14 18:40:39 EDT 2020 | dwl
A reflow oven with Center rail support can help. If your volumes are too low to justify spending $$ on a proper carrier, titanium stiffeners applied to the PCB before it goes into reflow is a cheap, albeit manual solution.
Electronics Forum | Tue Feb 09 20:29:39 EST 2021 | jdengler
Talk to your board house to see if the can lift the long score lines in the boarder so that those boarders are not completely cut through and it will stiffen the whole array. Jerry
Electronics Forum | Thu May 07 12:29:17 EDT 1998 | Rob Williams
I am running a board that is .062" thick and has components that over hang the edge of the board by .090". I have bottom side smt components (chip caps and resistors only) and use the turbulent wave to help solder the components. The problem I am h
Electronics Forum | Mon Oct 12 22:35:55 EDT 1998 | Hank Hsiung
Hello, friends: Do you know where I can buy cheap double sided flexible circuits, especially adhesiveless system. Also, when I make double sided flexible circuit assembly, beside using temporary stiffener, any other method to do double sided as
Electronics Forum | Sat Oct 17 23:54:15 EDT 1998 | Kallol Chakraborty
the size of panel > is the free real-state) or greater, would help in selective stiffening of the panel itself for multiple placement for multiple assemblies hence achieving cost reduction. Hope it helps. If you need any info. for our company for t
Electronics Forum | Tue Jun 17 11:18:20 EDT 2003 | Claude_Couture
How are the 8 units distributed on the panel? 1 X 8, 2 X 4? Are there "V" groves scored in the panels to "break away" the units? Do you run on edge conveyor in the reflow oven? You need center support if you have 2X4 pattern with "V" grooves. Or us
Electronics Forum | Tue Apr 25 13:05:08 EDT 2006 | Hoss
TMC, Are you interested in this approach because you only have a flat belt conveyor and want to keep the components from being moved by the belt on the second pass? If so, you might try adding some stiffeners to the board edges to stand the board o
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