slide1 n.
Skip this Video
Download Presentation
Conference on Substitution Hamburg, 13-14 June 2002

Loading in 2 Seconds...

play fullscreen
1 / 8

Conference on Substitution Hamburg, 13-14 June 2002 - PowerPoint PPT Presentation

  • Uploaded on

Working Group 3 Printed Circuit Boards. Introduction by: J. Lohse, Ökopol. Conference on Substitution Hamburg, 13-14 June 2002. Some Characteristics of Printed Circuit Boards:. Integral part of all electronic devices (IT, consumer goods, automotive etc.).

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'Conference on Substitution Hamburg, 13-14 June 2002' - duc

Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Working Group 3

Printed Circuit Boards

Introduction by: J. Lohse, Ökopol

Conference on Substitution Hamburg, 13-14 June 2002


Some Characteristics of Printed Circuit Boards:

  • Integral part of all electronic devices (IT, consumer goods, automotive etc.).
  • High-volume market, significant growth rates.
  • The dominating material is FR4 (glass-fibre reinforced epoxide).
  • UL-94 norm commonly applied defines classes V0, V1 related to resistance to flammability.
  • Substances most commonly applied to achieve flame resistance are brominated organic chemicals.

Concerns about brominated flame retardants (BFR)

  • Toxic and suspected CMR properties of many BFR substances
  • Low biodegradability and/or formation of toxic metabolites
  • Diffuse losses from products in use
  • Ubiquitous occurrence in urban environment and remote areas
  • Found in human blood (exposed workers)
  • Found in human breast-milk (general population)
  • PXDD/F formation upon accidental fire
  • PXDD/F formation upon thermal stress during recycling

Initiatives at the political level

  • Voluntary phase-out of some BFR by German chemical industry (after their behaviour as dioxin precursors was discovered)
  • Draft ROHS Directive requires substitution of PBB / PBDE
  • EU Risk Assessment on TBBA (ongoing)
  • Draft WEEE Directive requires dismantling of BFR-components
  • Legislative initiatives (e.g. in Germany and Denmark)
  • Eco-labelling criteria (EU flower, national & private labels) restrict the use of some or even all BFR.
  • Pressure from environmental NGOs.

Initiatives at enterprise level (individual companies)

  • Circuit board manufacturer: disposal problem for production waste initiated search for substitutes
  • E&E manufacturer: early internal ban of PBB and PBDE - working towards total BFR phase-out to fulfill eco-label criteria
  • Car manufacturer: early internal ban of PBB and PBDE - working towards halogen-free materials in general where possible
  • Base-material supplier: offers halogen-free FR4 material and seeks first mover advantage
  • Market pressure from several Asian manufacturers
  • [parallel efforts in Asia and US to phase out Pb solder]

Substitution strategies

  • Use of TBBA instead of PBB / PBDE
  • polymerized TBBA (reduces some but does not avoid all risks)
  • Phosphorus-based FR (shielding effect by solid-base reaction)
  • Mineral-based FR (ATH and similar - dilution & cooling effect)
  • Change of base material (e.g. foams, polysiloxane etc.)
  • Geometric separation of high and low voltage components
  • Reduce operating voltage.

Substance --> material --> product level


Use of P-based FR instead of TBBA - arguments and questions:

  • Economics
  • Additional cost of material ?!
  • Investments in process necessary ?
  • Dependance on single supplier ? !
  • Technical functionality
  • Functional equivalence of substitute ? (safety standards, market requirements)
  • Communication / awareness
  • Necessity to involve all actors in the chain !
  • Ecotox-profile as strong driver at company level ??
  • Risk Assessment
  • Sufficient knowledge about ecotox-profile of substitutes ?
  • Regulative frame
  • Upcoming legislation !
  • Existing standards in favour of traditional solutions ?!
  • Timing of innovation depends on parallel developments (e.g. Pb-free) !

Questions to the Working Group:

 Is it a case for substitution - YES or NO ?

 If YES: what is needed to promote substitution ?

(present barriers, supportive actions, legal or market

instruments etc.)

 If controversial: what would be the right procedure to decide ?

(criteria; stakeholders to be involved; ...)

 [if all say NO: why then are BFR high on the political agenda ?]