Thank you to those who replied - good information.

Regards,
Peter 


-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of Yuan-chia Joyce Koo
Sent: 29 July 2019 18:23
To: [log in to unmask]
Subject: Re: [TN] Sustainable pcb base materials?

and cost (agree with all listed).  The best way is highly integrated (almost everything on chip) c.c.t and minimum use of PCB (required vertical integration of design - which only few company capable of doing - control from components all the way to product).
IMHO.
jk
On Jul 29, 2019, at 8:46 AM, Stadem, Richard D wrote:

> Please refer to IPC 4101A which is the standard describing most of the 
> circuit materials, including flex circuits. There are other materials, 
> even compressed/laminated paper, PEN, etc. Some may not be suitable 
> for your application in terms of reliability and safety, so proceed 
> with caution. You will need to pay attention to dielectric properties, 
> UL ratings, suitability to humidity absorption in moisture-laden 
> areas, properties under extreme temperatures, CTE compatibility with 
> the components intended to be mounted, surface adhesion or bondability 
> with coatings, pottings, adhesives, etc., etc. Lots of things to 
> consider.
>
> -----Original Message-----
> From: TechNet <[log in to unmask]> On Behalf Of Peter Swanson
> Sent: Monday, July 29, 2019 7:09 AM
> To: [log in to unmask]
> Subject: [TN] Sustainable pcb base materials?
>
> Speculative enquiry - I wonder if anyone has any experience/ 
> opinions/awareness of alternative pcb base materials (alternative to 
> FR4) which are more readily recyclable, or biodegradable, or 
> sustainable in other ways?
>
> Thanks for any feedback.
> Peter
>
>
>
> [intertronics logo]<https://www.intertronics.co.uk/>
>
>
> [Read our latest news]<https://www.intertronics.co.uk/blog/>
> [Connect to us on Linkedin] <http://www.linkedin.com/company/
> intertronics>  [Follow us on Twitter] <http://twitter.com/#!/  [Watch 
> intertronics> us on YouTube] <http://www.youtube.com/user/
> intertronicsadhere>
>
> [Better bonding from INTERTRONICS]<http://www.intertronics.co.uk/>
>
>
>
> Peter Swanson
> Managing Director
> INTERTRONICS
> Oxfordshire, England
> t +44 1865 842842
> e [log in to unmask]
> www.intertronics.co.uk<https://www.intertronics.co.uk>
>
> 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