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Subject:
From:
Peter Swanson <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Peter Swanson <[log in to unmask]>
Date:
Fri, 23 Aug 2019 15:57:14 +0000
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text/plain
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text/plain (1 lines)
Ed,



Sorry, I don't have a copy, but it is referenced in the Wikipedia entry: https://en.wikipedia.org/wiki/Relative_permittivity



Regards,

Peter



-----Original Message-----

From: TechNet <[log in to unmask]> On Behalf Of Edward Rios

Sent: 23 August 2019 16:46

To: [log in to unmask]

Subject: Re: [TN] Dielectric constant



Would you be able to post a copy of this directive?



Thanks,



*Ed Rios*

Quality & Reliability

*Motorola Solutions, Inc.*



+1.847.576.4793

[log in to unmask]



<http://www.motorolasolutions.com/>





On Fri, Aug 23, 2019 at 7:00 AM Peter Swanson < [log in to unmask]> wrote:



> I would appreciate some feedback on terminology. This applies to 

> specifications for pcb laminates, coatings and encapsulants, etc.

>

> My colleagues have come across a directive from the Institute of 

> Electronic and Electrical Engineers (IEEE) about language, and other 

> supporting references ( 

> https://urldefense.proofpoint.com/v2/url?u=https-3A__en.wikipedia.org_

> wiki_Relative-5Fpermittivity&d=DwIFAg&c=q3cDpHe1hF8lXU5EFjNM_A&r=rhnQx

> yKaVoe2yX1KMgLHC9ePXe4msRwxvVGCZ5QZPxAEvHLy73UNwa1mcAZLoFZj&m=CxVk0gdJ

> MDJhlnU51KboJ-W3HwCXTXVKRr3yc0hlB-o&s=nrp6NyAdEJGfpHiAYHbeWw2EUKG0lOfX

> lVnoEFr7yDE&e= ). "Dielectric Constant" is now basically a 

> struck-off/obsolete term as its meaning has become too imprecise 

> through misuse over the years. "Relative Permittivity" is the phrase 

> that engineers should be using rather than "dielectric constant" as it 

> has a more precise definition of the permittivity of a material in 

> relation to the permittivity of a vacuum.

>

> My question is - what is in actual use at the coalface? Is this just 

> stuff academics have said? Are you aware of this distinction? Are the 

> latest data sheets you get still using "dielectric constant"? Some of 

> the ones I see still use it.

>

> Just some musings on a Friday afternoon...

>

> Best,

> Peter

>

>

>

> [intertronics logo]<

> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.intertronics.

> co.uk_&d=DwIFAg&c=q3cDpHe1hF8lXU5EFjNM_A&r=rhnQxyKaVoe2yX1KMgLHC9ePXe4

> msRwxvVGCZ5QZPxAEvHLy73UNwa1mcAZLoFZj&m=CxVk0gdJMDJhlnU51KboJ-W3HwCXTX

> VKRr3yc0hlB-o&s=tkLxZs6KTpEbwtvrCquhEFH18qDNw_A4CRSSRHrG5Rc&e=

> >

>

>

> [Read our latest news]<

> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.intertronics.

> co.uk_blog_&d=DwIFAg&c=q3cDpHe1hF8lXU5EFjNM_A&r=rhnQxyKaVoe2yX1KMgLHC9

> ePXe4msRwxvVGCZ5QZPxAEvHLy73UNwa1mcAZLoFZj&m=CxVk0gdJMDJhlnU51KboJ-W3H

> wCXTXVKRr3yc0hlB-o&s=6uSp1KcE_mRLqz0kfiTxbxU6Uzb_-Ofhppn17PBuU0o&e=

> > [Connect to us on Linkedin] <

> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.linkedin.com_c

> ompany_intertronics&d=DwIFAg&c=q3cDpHe1hF8lXU5EFjNM_A&r=rhnQxyKaVoe2yX

> 1KMgLHC9ePXe4msRwxvVGCZ5QZPxAEvHLy73UNwa1mcAZLoFZj&m=CxVk0gdJMDJhlnU51

> KboJ-W3HwCXTXVKRr3yc0hlB-o&s=Z-kJhd7jb8xd-KstUyTDdBKxgKGsQtRhm0gRCCRU1

> iQ&e=

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> _intertronics&d=DwIFAg&c=q3cDpHe1hF8lXU5EFjNM_A&r=rhnQxyKaVoe2yX1KMgLH

> C9ePXe4msRwxvVGCZ5QZPxAEvHLy73UNwa1mcAZLoFZj&m=CxVk0gdJMDJhlnU51KboJ-W

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> >  [Watch us on YouTube] <

> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.youtube.com_us

> er_intertronicsadhere&d=DwIFAg&c=q3cDpHe1hF8lXU5EFjNM_A&r=rhnQxyKaVoe2

> yX1KMgLHC9ePXe4msRwxvVGCZ5QZPxAEvHLy73UNwa1mcAZLoFZj&m=CxVk0gdJMDJhlnU

> 51KboJ-W3HwCXTXVKRr3yc0hlB-o&s=LBgob0Kui3L1sBYeoxX5cC3Ic5NoS9HpnbKQNbI

> __qk&e=

> >

>

> [Better bonding from INTERTRONICS]<

> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.intertronics.c

> o.uk_&d=DwIFAg&c=q3cDpHe1hF8lXU5EFjNM_A&r=rhnQxyKaVoe2yX1KMgLHC9ePXe4m

> sRwxvVGCZ5QZPxAEvHLy73UNwa1mcAZLoFZj&m=CxVk0gdJMDJhlnU51KboJ-W3HwCXTXV

> KRr3yc0hlB-o&s=ZZk0EP-mo-cB_dnz7eQmF0bisSg8_iv-kQNA_DtQDME&e=

> >

>

>

>

> Peter Swanson

> Managing Director

> INTERTRONICS

> Oxfordshire, England

> t +44 1865 842842

> e [log in to unmask]

>

> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.intertronics.c

> o.uk&d=DwIFAg&c=q3cDpHe1hF8lXU5EFjNM_A&r=rhnQxyKaVoe2yX1KMgLHC9ePXe4ms

> RwxvVGCZ5QZPxAEvHLy73UNwa1mcAZLoFZj&m=CxVk0gdJMDJhlnU51KboJ-W3HwCXTXVK

> Rr3yc0hlB-o&s=740YP2IBX7mj2uqboMLvkvTsnF1TA0gcQLLGpim2nXw&e=

> <

> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.intertronics.

> co.uk&d=DwIFAg&c=q3cDpHe1hF8lXU5EFjNM_A&r=rhnQxyKaVoe2yX1KMgLHC9ePXe4m

> sRwxvVGCZ5QZPxAEvHLy73UNwa1mcAZLoFZj&m=CxVk0gdJMDJhlnU51KboJ-W3HwCXTXV

> KRr3yc0hlB-o&s=f4EHUEbgrOxHtwe9ZRL2svVG8GGqn4rmvyi7xvSnFuI&e=

> >

>

> INTERTRONICS is the trading name of Cygnet Electronics Ltd, registered 

> in England No 1835617 Registered office: 12a Station Field Industrial 

> Estate, KIDLINGTON, Oxfordshire, OX5 1JD, ENGLAND INTERTRONICS is 

> certified to ISO 9001:2015

>



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