Electronics Forum | Fri Jun 02 17:43:17 EDT 2000 | Dave F
James: I believe Delmat is a proprietary product. Check with some of the solder fixture fabricators in the archives. Continuing, I would not select knowingly Delmat as a board stiffener. It's a composite material similar to oriented strand board
Electronics Forum | Sat Dec 18 08:23:33 EST 2010 | remullis
I experienced warpage on a 7'x 13" long board, unfortunately my oven does not have center support. I use stiffeners on both of the short ends. It fixed my problem. Some of the things I was experiencing with the warpage on the second pass were placem
Electronics Forum | Fri Jun 02 15:53:51 EDT 2000 | James Burrell
I'm considering using Delmat, or some equivalent material, as a stiffener for rather large pcb, but I don't know the material properties. Specifically I'm interested in: Young's Modulus, E Poisson Ratio, nu Density, rho Strength, Thanks, Jim
Electronics Forum | Tue Jun 28 02:37:17 EDT 2005 | grantp
Hi, Check to make sure your paste is not dried up, and it should roll across the stencil, not slide. Also, if your running in a cold environment, then that can stiffen up the paste, and it will still to the blades, and not roll over the stencil corr
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
