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Restriction of Certain Hazardous Substances RoHS

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Title: Restriction of Certain Hazardous Substances RoHS


1
Restriction of Certain Hazardous Substances
(RoHS)
2
Restriction of Certain Hazardous Substances
(RoHS)
Directive reference 2002/95/EC
Member states shall ensure that from 1st July
2006, new EEE put on the EU market does not
contain 6 restricted substances
Article 4.1 of RoHS directive states the
following 6 substances
  • Lead (Pb)
  • Cadmium ( Cd)
  • Mercury(Hg)
  • Hexavalent Chromium ( Cr6)
  • Polybrominated Biphenyles ( PBB)
  • Polybrominated Diphenyle Ether ( PBDE)

3
Restriction of Certain Hazardous Substances
(RoHS)
Where these substances are used ?? Some examples
  • Lead is used in almost all solder joint lead
    finish.
  • Cadmium is used in cable sheathing as anti
    corrosive agent for protecting connectors
    fixing in salt spray conditions.
  • Mercury is used in thermostats, sensors various
    forms of energy saving lamps
  • Hexavalent chromium is used in metal coatings for
    corrosion protection and wear resistance
  • PBB PBDE are fire retardant materials and added
    to PCB, connectors, Plastics etc.

4
Restriction of Certain Hazardous Substances
(RoHS)
  • As per the directive prohibition of other
    hazardous substances shall be decided as soon as
    scientific advice is available
  • Directive is applicable to WEEE falling under
    categories 1,2,3,4,5,6,7 10 of annex 1A of WEEE
    directive.
  • 8 9 will have delayed start.
  • RoHS directive does not apply to spare parts
    for the repair or reuse of EEE put on the market
    before 1st Jul 2006

5
Restriction of Certain Hazardous Substances
(RoHS)
Are there any limits for the substances ?
  • For the purpose of RoHS regulations, a maximum
    concentration value of up to 0.1 by weight in
    homogeneous materials for Lead, Mercury,
    Hexavalent Cr, PBB, PBDE and up to 0.01 by
    weight in homogeneous materials for Cadmium will
    be permitted in the manufacture of EEE ( DTI, UK
    )
  • Lead (Pb) 1000 ppm
  • Cadmium ( Cd) 100 ppm
  • Mercury(Hg) 1000 ppm
  • Hexavalent Chromium ( Cr6) 1000 ppm
  • Polybrominated Biphenyles ( PBB) 1000 ppm
  • Polybrominated Diphenyle Ether ( PBDE) 1000 ppm

6
Restriction of Certain Hazardous Substances
(RoHS)
Where to look for these substances ?
  • All homogeneous components within the product
    need to conform to the maximum concentration
    limits by July 1 2006

What is homogeneous material ?
  • Materials that can not be disjoined into
    different materials.
  • Mechanically disjoined means, material that can
    be separated by mechanical actions such as
    unscrewing, cutting, crushing, grinding
    abrasive process
  • Understood as uniform composition throughout
    like plastic, ceramics, metals, alloys, etc.

7
Restriction of Certain Hazardous Substances
(RoHS)
? Producer
Who is responsible ?
  • Produces are required to keep appropriate
    records for a period up to 4 years after the use.

Who is a producer ?
  • Any person / company who irrespective of selling
    technique used,
  • Manufactures sells EEE under his own brand
  • Resells under their own brand, equipment
    produced by other suppliers
  • Imports or exports electrical electronic
    equipment on a professional basis into member
    states.

8
Restriction of Certain Hazardous Substances
(RoHS)
How this will be enforced ?
  • Test purchases are made in the market
  • Will be tested for restricted substances
  • Compliance documents will be requested
  • issue non compliance notice / ask for actions
    taken

What is the major impact on business ?
  • EOL end of life for parts, products have seen
    a steady upward trend in recent past is
    expected to grow at faster rate.

9
Restriction of Certain Hazardous Substances
(RoHS)
What we need to do ?
  • Even though Medical devices have a late start,
  • Identify restricted substances in homogeneous
    materials, get the test reports, verify
    document the same.
  • Look for alternate materials / process where
    ever restricted substances exceed the limits,
    also where ever EOL is announced,
  • PWA soldering process, where, in absence of Pb,
    soldering temp. goes up, we need to look at the
    machine, temp. profile, component ratings.
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