Restriction of Certain Hazardous Substances RoHS

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Restriction of Certain Hazardous Substances
(RoHS)
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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)

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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.

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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

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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

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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.

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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.

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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.

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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.