Electronics Forum | Mon Feb 20 17:56:46 EST 2006 | Chris
If you are running FR4 PCBs and not something exotic like Kapton flex circuits, I would go with the Dek 265 any day of the week. You will find that Dek supports the fully automatic printer much better than the semiautomatic printers like the 260, 24
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
Electronics Forum | Thu Apr 26 16:47:52 EDT 2007 | Cmiller
Is anyone using standard FR-4 material for ROHS? All I have ever seen to indicate the need to go to a high tg/td board is that the material may fail after repeted rework. I have a customer that is trying to use IS-410 and it is causing electrical pro
Electronics Forum | Fri Aug 21 04:43:14 EDT 2009 | ghepo
Hello, I suggest you visit the website http://www.analysispcb.com, where I found these information : PARAMETERS FOR DOUBLE “V” SCORING LEAD FREE LAMINATES Typ WEB Thickness, 1.6mm : 0.38mm (+.15/-0) "...Tg is not a good indicator of a materials’
Electronics Forum | Wed Nov 15 09:36:27 EST 2006 | Board House
Hi AJ, The biggest mistake in the industry today is documentation for lead free assembly required product. We are still seeing prints coming in saying Lead Free / High TG FR4. When in reality standard FR4 170 Tg. material is considered High Tg. and L
Electronics Forum | Wed Nov 28 22:33:24 EST 2007 | davef
There is no specification for lead-free HASL. You can use any lead-free solderability protection that meets your customer requirements. Use IPC-9701 �Performance Test Methods and Qualification Requirements for Surface Mount Solder Attachments� to ass
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 | Mon Mar 07 15:35:35 EST 2005 | John M
It has been my experience that the standard Fr4 material (Tg 135c) will discolor when processed at the new higher temperatures required for the high tin alloys... We have been using the High Tg Fr4 (Tg 170c) for many years to ensure this does not hap
Electronics Forum | Wed Jun 22 02:30:33 EDT 2011 | boardhouse
if its a RoHs Assembly they should be using an FR4 material designed with higher TD to handle higher Assembly temps. 370HR,IT158, IT180, 4000-29 just to name a few that would be suitable. Standard FR4 material is not designed to handle the higher as
Electronics Forum | Mon Feb 06 10:12:30 EST 2006 | Yash Sutariya
Hi, I authored the presentation so I may be able to help you out with your Q's. 1. IPC is in draft stage for 4 new material specs. These are in the presentation. I would focus on IPC 4101/ 121 and /124. Match your current Tg requirement to the T
