Electronics Forum: tg rating ipc 4101 (Page 1 of 1)

Cu% spec for lead free HASL surface finish

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

RoHS compliant PCB

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

FR4 boards Delamination Cause?

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

Alternative PCB Material

Electronics Forum | Sat Jun 06 15:14:35 EDT 2009 | ysutariya

If the concern is the increased moisture absorption associated with lead-free capable materials, you probably have the most experience with phenolic materials like Isola IS410 or 370HR. The best move would be to switch to an IPC 4101/99 or /124 mate

Minimum Tg for LeadFree board.

Electronics Forum | Sun Aug 23 11:30:51 EDT 2009 | ysutariya

I think you're getting steered in the wrong direction, with the exception of DaveF's link. By the way, I'm a PCB fabricator, just to avoid any backlash. IPC 4101 is the IPC guideline for raw materials. It has 6 slash sheets for lead-free capable

Re: temperature range

Electronics Forum | Mon Nov 27 17:44:10 EST 2000 | Dave F

Gawd. Sure FR-4 will meet those conditions. Tg [check the fine SMTnet Archives for discussion on Tg] of FR-4 is 130�F or so. Consider: * Is the delT between Tg and the upper operating [or storage] temperature acceptable for your application? * D

Board Warpage

Electronics Forum | Tue Apr 29 07:38:42 EDT 2008 | davef

Warpage typically (not always) kinda, sorta points to a fabrication bake induced issue that is the racking technique & may be relieved by "flat baking" under weight. Your baking at 125* won't do dip. You need to get the laminate temperature above it'

Re: FR4 vs Polyamide

Electronics Forum | Mon Feb 15 15:33:47 EST 1999 | Earl Moon

| Any info on the pros and cons of FR4 or Polyamide ref the use of soldering PGAs would be helpful. ie. temp co-efficient diffs, baking, wave soldering, Convection reflow etc | I'm sure you know all the basic differences as Tg, X, Y, and Z expansi

Re: PCB fab supplier supplier/evaluation

Electronics Forum | Sun Aug 08 11:15:32 EDT 1999 | Earl Moon

| | Mike, | | | | Got your message and those of others concerning PCB fab supplier evaluation and qualification check lists, etc. I have a severe problem here in WI as I can hardly access the internet, and when I do it is cut off abruptly for no goo

  1  

tg rating ipc 4101 searches for Companies, Equipment, Machines, Suppliers & Information

Association Connecting Electronics Industries (IPC)
Association Connecting Electronics Industries (IPC)

IPC is the trade association for the printed wiring board and electronics assembly industries.

Training Provider / Events Organizer / Association / Non-Profit

3000 Lakeside Drive, 309 S
Bannockburn, IL USA

Phone: 847-615-7100