Practical Aspects of RoHS Compliance

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Practical Aspects ofRoHS Compliance
Liz Moyer, Manager Environmental, Safety and
Health Public Affairs Texas Instruments
Incorporated
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TIs Commitment to the Environment

• Active in industry standards organizations and
  working with legislative groups to set achievable
  and meaningful environmental goals
• Began removing Lead (Pb) from products more than
  a decade ago
• 91 of planned devices already compliant to RoHS
• 97 of 2Q05 units shipped already compliant
• Executive SLT Sponsored Program Office
• Focused on Piece of Mind for the Customer

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OEM Readiness Risk

• Every board, component, sub-assembly and bulk
  material
• must have material composition information
  available to
• prove compliance and support producer due
  diligence
• OEMs and each element in their supply chain
  must assume liability for
• accurate data collection, aggregation and
  reporting
• Results of Non-Compliance
• Goods impounded
• Loss of rights to sell into the EU (25
  countries)
• Potential non-recoverable loss of market share
• Reportable material event under Sarbanes-Oxley
  Act Section 409
• Fines, media coverage, etc.

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RoHS and Green Products
An OEM Perspective
Pilot/Ramp
Production
Awareness
Jan04
Jan05
Jan06
Jan07
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Pb-free, RoHS Green
Umbrella Policies
How Green do we want to be?

• Required
• Lead lt1000ppm

• Assumed
• 250C to 260C reflow
• (JESD-020B)
• - Moving to 260C
• (JESD-020C)
• Part number? Release date?

Note Cadmium threshold per JIG is 75ppm
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RoHS/Green Product Challenges

• Technical Development
• Maintain Performance Excellence
• Eliminate Tin Whiskering
• Flow Solder Temperature Compatibility
• Old Standard Product Compatibility
• Supplier Management
• Part Number Differentiation
• Labeling
• Symbolization
• Customer Communications
• Compliance Assurance, Import/Export Requirements
  per jurisdiction

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Global RoHS Legislation
The EU is not the only region proposing
Legislation
New Jersey, Wisconsin, Washington Proposed or
in work
European Union RoHS/WEEE legislation. Exemptions
proposed and being constantly revisited.
China Banned substances equivalent to
RoHS/WEEE. Scope and exemptions to be finalized.
California SB20 legislation, covers
recyclingfees, SB50 only allows RoHS-friendly
products after 1/01/07.
EU RoHS compliant End-Equipment Shipments are
required by July 1st, 2006
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Components from Many Suppliers Share One Circuit
Board, One Flow Solder Process
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Getting the Lead (Pb) Out
Ball Grid Array (BGA) Parts
Leadframe Based Parts
Common Pb-Free Solutions 1) Nickel-Palladium-Gol
d Plating 2) Tin Plating (risk of Tin Whiskers)
Industry Standard Pb-Free Solution 1)
Tin-Silver-Copper Alloy Solder Balls
iNEMI Recommendations on Lead-Free Finishes for
Components Used in High-Reliability Products
(May2005) Recommendation1 Use a Non-tin
plating Nickel-Palladium-Gold should be strongly
considered for lead-frame applications.
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Part Numbering, Leadframe Parts
SnPb Leadframe
SnPb Board Process (Low-Temp)
NiPdAu Leadframe
Pb-Free Board Process (High-Temp)
Converted
G4

• TIs primary Pb-Free solution is
  Nickel-Palladium-Gold (NiPdAu).
• TIs Pb-Free leadframe products are backward
  compatible with SnPb processes.
• A Pb-Free PN will be added using JEDEC/IPC based
  Pb-Free codes.
• Both the Standard PN the Pb-Free PN will be
  orderable part numbers.

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Part Numbering, BGAs
SnPb Solder Balls
SnPb Board Process (Low-Temp)
Bad Solder Joints
SnAgCu Solder Balls
Pb-Free Board Process (High-Temp)
not actual color

• BGA Parts are not interchangeable, so two part
  numbers are required.
• Support for both versions will be driven by
  customer/market demand.
• New part numbers substitute a Z into the
  package suffix (Gxx ? Zxx, YEx ? YZx).

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Symbolization Strategy

• Parts will be marked with the following
  2-character codes,
• space permitting. (98 of devices are OK, pkg
  size must be gt 3.5mm X 3.5mm )
• This added symbolization may lag the Conversion
  Date Code
• by 1-2 months due to WIP issues.

JESD97 only requires Pb lt 1000ppm, TI will only
use these markings when parts meet our Pb-Free
Green definitions. (TI Pb-Free RoHS
High-Temp compatible, TI Green TI Pb-Free
and no Sb/Br) Some TI parts (lt3) will use E3
(Matte Tin) or E6 (Tin-Bismuth).
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TI Box Labeling
Outer Box Shipping Labels will display the
ordered part number (Pb-Free PN or Std PN) and
will also contain the PB-Free logo and
Pb-Free/Green Finish Code.
Inner Box/Reel Labels
MSL Caution Label
Comparing the Assembly Site Date Code to the
Search Tool info will always identify Pb-Free
parts. ( The initial Pb-Free shipments of a part
might not have the Logo Finish Code on the
label. )
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TIs Material Content Analysis Process
Each TI Raw Material Supplier (lead frames, die
attach adhesive, bond wire, mold compound, etc)
analyzes and certifies, annually, the material
composition of the raw materials supplied to TI.
Weight data is then collected during each
assembly step for each package type/configuration
to identify the amount of each raw material used.
Finally, the 2 databases are merged to create a
material composition database for all TI package
types that can be queried by part number and
downloaded to Excel (TI Certificate included).
www.ti.com/leadfree
using an ISO/IEC 17025 or equivalent
third-party or independent accredited lab
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Development of a RoHS Compliance Strategy

• Rather than expecting manufacturers to prove that
  every part they buy is RoHS compliant, EU member
  states will likely expect manufacturers to
  establish documented and auditable systems to
  prevent noncompliant product from entering EU
  market.
• Development, implementation, and proof of a RoHS
  compliance strategy will be essential.
• Implementation of a best management approach
  that incorporates common compliance activities of
  industry leaders may prove to be a valuable
  corporate strategy.

Holly Evans, Strategic Counsel, LLC
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Ten Steps
Published in February 2005 issues of Circuits
Assembly magazine (http//www.circuitsassembly.com
).

• Determine Companys legal exposure
• Form company-wide RoHS compliance team
• Develop corporate-level compliance statement
• Develop internal compliance roadmap
• Assess companys supply chain exposure
• Qualify suppliers to determine RoHS readiness
• Establish supplier material declaration process
• Perform limited risk-based testing/validate
  results
• Exchange RoHS compliance data with customers
• Incorporate RoHS compliance strategy into
  corporate operations/review process regularly.

Holly Evans, Strategic Counsel, LLC
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Resources for Further Assistance

• US Commercial Service Buy USA website
  http//www.buyusa.gov/europeanunion/weee.html
• UKs Department of Trade and Industry website
  http//www.dti.gov.uk/sustainability/weee/index.ht
  m
• EU European Commission website
  http//europa.eu.int/comm/environment/waste/weee_i
  ndex.htm
• Holly Evans (703-496-4832, h.evans_at_cox.net)

Holly Evans, Strategic Counsel, LLC
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Lead-Free Factoid
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