Electronics Forum | Mon Feb 05 11:45:07 EST 2001 | peterbarton
Phil, One source for this information is form the manufacturer Park/Nelco. They have a large website and give specifications for all sorts of laminates, including FR4. Try http://www.nelcointernational.com/parknelco/fr4epoxy.htm. I'm sure that ot
Electronics Forum | Thu May 31 22:35:23 EDT 2012 | jacktan
I have encountered PCB delam issue with high density PCB. PCB has 42 layers , 5 mm thickness ,laminate material is NelcoN4000-13EP,Tg 210C and Td 350C. Have pre-bake at 125 c for 12 hrs before assy.My reflow temp is standard with 243 peak and TAL is
Electronics Forum | Mon Feb 02 11:51:23 EST 2004 | prs
Hello, I'm working with Nelco 4000-13 material .031 thk and am experiencing some warping. the board is roughly 1" by 3" and the warping is in the long dimension. The grain on the panel is also in the long dimension. Any pointers or advice on contr
Electronics Forum | Fri Jun 01 23:57:21 EDT 2012 | bwjm
HI Guys, i am facing similar issues with this BT resin material too. PCB specs are 4 layers, Nelco400013, same Tg and Td. My PCB delam after reflow. The PCB has both side mounted with SMDs. Initial mounting on the btm side after reflow, no delam. B
Electronics Forum | Thu May 08 12:11:30 EDT 2008 | boardhouse
Hi Wayne, I am just curious what material is being called out. Are you just specing FR4 or are you calling out a particular IPC 4101 / Some recommended laminates designed for Lead free assembly are: Isola 370HR Nelco 4000-11 or 4000-29 Iteq IT15
Electronics Forum | Thu Jan 31 18:14:40 EST 2008 | boardhouse
Hi Felix, First thing to verify is that your supplier is actually suppling you with the correct material. China is known for not keeping with the requested materials and will substitute if not controlled. I would recomend ITEQ, TUC or Nan ya for of
Electronics Forum | Mon Dec 08 17:06:59 EST 2008 | boardhouse
Hi MGL, Couple things to ask, have the boards recently been changed to Rohs builds? STD FR4 to High TD Laminate. Check the stack-up the board houses are using. Just about all Rohs laminate has Resin starvation issues when used in single ply co
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