It did, and IPC-D-279 in 1997, but they still have a lot of the flammability and performance test information and are referenced for nearly all of the slash sheets in IPC 4101, but I was not sure just what you needed. My apologies for not understanding what you are looking for.
You can also look through this presentation from SAE from last year on the subject:
<http://www.aecouncil.com/2014_AEC_W10_PCBQualification.pdf> http://www.aecouncil.com/2014_AEC_W10_PCBQualification.pdf from McLeish at DfR.
and NEMA LI 1-1198 and 1199 or IPC-TR-579. There may be more current information in there, especially for underhood applications. The presentation also recommends Clyde Coombs book Printed Circuits Handbook which I had forgotten about. It has a ton of PCB laminate testing info for underhood applications and is very recent.
When I was working for an overseas client recently I also found a European specification for PCB laminates commonly used in deep well drilling processes for the oil industry. I have requested that specification and will pass it on to you. It was similar to IPC 4101 but focused on laminates used in extremely harsh industrial underseas and oil drilling controls and sensors, and was very informative. I have been around for a long time, in many different environments, and the harshest conditions I have ever seen for electronics are underseas oil drilling. That is an environment that includes severe shock, extreme temperature excursions, incredible vibration, humidity, salt water exposure, etc.
You may wish to also look at Isola’s website on some of their very high temperature materials. These are intended for extremely harsh operating conditions, but some may not meet the RoHS requirements, so it is hard to tell if they will work in your intended application.
Once again, my apologies for giving you “flashbacks”.
dean
From: Jack Olson [mailto:[log in to unmask]]
Sent: Monday, March 30, 2015 4:26 PM
To: [log in to unmask]
Cc: (Designers Council Forum)
Subject: Re: [DC] Question of the Week - Laminates and Temperature
Well, I think IPC-D-275 went obsolete in 1996?
but I hope you're enjoying your flashbacks!
For the other question that was asked, sorry if I wasn't clear.
We have already been using /126 for several years,
I was just wondering what a good step towards BETTER thermal characteristics would be BEYOND /126
(like what might be used in an automotive engine compartment.)
Maybe /126 IS used there, I wouldn't know, but I don't know how to ask any clearer, sorry
I just want a better idea of how a designer should know when to look for something better
I'm not sure I even have an IPC-D-279, I'll look...
but I sure would feel more comfortable reading something that was written in THIS millennium
(for the record, I don't think IPC-4101/126 even EXISTED back then)
but thanks for taking the time to answer,
Jack
On Thu, Mar 26, 2015 at 6:38 PM, Dean Stadem <[log in to unmask]> wrote:
Jack, get a copy of IPC-D-279 and check out section 4.0. Also please read through IPC-D-275.
The IPC put all of that information there just for you, Jack, because they just knew that someday you would realize you were not happy with plain old FR-4 anymore.
Just for you, completely detailed and all laid out. No need to go anywhere else. Not even Barnes and Noble. Nope, nossir, it's all right there. Everything you ever wanted to know about PWB substrate materials. Everything.
Suffer from insomnia? Well, here is a sure cure.
But speaking from experience, nothing could be better for a fellow Viking such as yourself than to curl up in the fish house on a cold March night with a little battery-operated LED lamp and soak in IPC-D-279 while listening for that little "jingle, tink" from the reel on the wall!
There are also a number of reference documents listed in one or both of those two standards, in case you just can't wait for the next edition. Sorry, but they would not let me put the ads for the X-ray glasses and opportunities for further education from the Close Cover Before Striking Institute of Advanced Electronics Design in the back pages.
As the Marvel editors used to say...'Nuff said.
Dean
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Jack Olson
Sent: Thursday, March 26, 2015 11:35 AM
To: [log in to unmask]
Subject: [DC] Question of the Week - Laminates and Temperature
Ok, let me say right here, I really was NOT going to try and make up a "Question of the Week" just for something to do. If you guys WANT to discuss different topics on a regular basis, I'm all for it. but I honestly need to ask about this (I'm not just "stirring the pot").
So I'm showing my ignorance by asking this, but I'm not sure where to go for help...
During the transition to meeting RoHS requirements and designing for RoHS compatibility we have begun specifying a higher quality of material than we used to, conforming to IPC-4101/126
What I would like to understand is:
How to know when I should be looking for a EVEN BETTER material (related to high-temperature applications and long-term thermal cycling). What IS the next step up? What would be used in an automotive engine compartment, for example?
I am usually designing products like displays that are in a more benign environment, but where can I learn more about this?
Jack
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