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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