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1 Lead-free/RoHS Compliance Roadmap customer version, April 04
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2Contents Artesyn lead-free/RoHS compliance position RoHS Overview (Restriction of Hazardous Substances) Current status Implementation strategy Outline implementation plan Implementation timeline
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3 Artesyn lead-free/RoHS compliance position Artesyn will actively pursue lead-free/RoHS compliance in direct response to: RoHS legislation enacted in Europe Market forces Customer requirements RoHS implementation deadline is July 1, 2006, but customer requirements dictate Artesyn compliance in advance of this date Compliance goal – end 2005 Earlier compliance on some products, as required by customers Artesyn lead-free definition: A board mounted power product is defined to be lead-free if it contains no more than 0.1% Pb by weight. A stand-alone power product, shipped in a chassis, is defined to be lead-free if each soldered assembly within the product contains no more than 0.1% Pb by weight. The chassis and each mechanically attached component will be evaluated individually and may contain no more than 0.1% Pb by weight.
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4 RoHS overview RoHS legislation bans the following materials, effective July 1, 2006: Pb – solder and component terminations Cd – cables and insulation Cr+6 – conversion coatings on sheet metal and hardware Hg – maybe no problem PBB & PBDE – brominated flame retardants in component molding compounds Exemption for Pb in solders exists for high-end storage and telecom networking equipment but component terminations must be lead-free and most customers covered by the exemption are requiring lead- free assembly in advance of July 1, 2006 –some customers may use exemption to cover shipment of existing products nearing end-of-life on July 1, 2006
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5Status Lead-free/RoHS compliance team formed 10/03 Mission: –Identification of compliance issues throughout supply chain –Implementation of RoHS compliant components and materials –Development of lead-free assembly processes –Qualification of new components, materials and processes –Reliability testing to ensure product quality Global participation with representation from all manufacturing sites and all engineering disciplines
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6Status First lead-free customer samples built in ZhongShan Jan-04: Existing BOMs used, approximately 45% of components lead- free/RoHS compliant OSP and ENIG lead-free PWB finishes 2-sided SnAgCu reflow process with SnAgCu hand soldering for remaining through-hole components Reliability testing in progress Thermal shock, HASS screening completed with good results Solder joint cross-sectioning and element analysis in progress
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7Status First lead-free wave soldered customer samples built in ZhongShan April-04 Through-hole-only product on single-sided PWB with OSP lead-free coating 2 sided SMT product on 4 layer PWB with ENIG lead-free coating and selective wave soldering for remaining through- hole components Process development, sampling conducted with active participation from Tatabanya, Redwood Falls and ZhongShan manufacturing engineers Reliability testing scheduled to begin in May
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8Status Component supply chain query under way
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9 Implementation Strategy Ensure backward/forward process compatibility All finish choices must be compatible with both SnPb and SnAgCu soldering processes Components: Sn with Ni barrier PWBs: OSP, probably Shikoku Glicoat and Entek Cu106A-HT No Bi finishes or materials Reliability testing incorporated into implementation plan Single solder paste, wave flux for global use Local input sought, but global control required Implement lead-free components by QML change Many vendors have substituted lead-free terminations without part number change Lead-free PCN to customers
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10 Implementation Plan Three integrated, but parallel plans: Components Identify, specify and procure RoHS-free components Implement lead-free parts when available – one way change PWB finishes Identify, specify, qualify and procure RoHS-free PWBs Ensure solderability, reliability with both SnPb and SnAgCu processes Implement lead-free PWB coatings by product after qualification Lead-free processes Develop and qualify lead-free soldering processes Implement lead-free processes by product after successful conclusion of reliability testing
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11 Implementation Plan - Components Vendor query: RoHS free? When? Part number change? Specify termination finish in detail: metal content by %, plating specification, including underplate thickness and annealing process if matte Sn Identify MSL changes by exception (vendor PCN) To date, all remain MSL 1 Implement RoHS-free components by QML change FIFO control required Single PCN to customers – implement as available When RoHS-free available and implemented, old parts cannot be used or reordered Develop and qualify RoHS-free internally sourced magnetics Lead-free terminations Heat resistant packages (>260º C)
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12 Implementation Plan – PWB finishes Customer input: ENIG banned by many Immersion Ag maybe OSP preferred OSP results to date: Shikoku Glicoat OSP used for lead-free assembly trials to date with good results Entek Cu106A-HT will be tested soon
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13 Implementation Plan – PWB finishes OSP controlled implementation: Verify solder joint quality with SnPb and SnAgCu processes Verify solder joint quality with SnPb and RoHS-free component terminations HALT testing Thermal cycling followed by electrical test, solder joint cross-sectioning and metallurgical analysis Implement by product
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14 Implementation Plan – Lead-free solder Lead-free solder implementation: three parallel plans SMT reflow Wave and selective solder Rework & repair
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15 Implementation Plan – Lead-free reflow Lead-free SMT reflow Select no-clean SnAgCu paste with distribution & technical support in China, Europe, US Optimize profiles Upgrade factory equipment where necessary Verify solder joint quality, minimum voiding Reliability testing by product HALT Thermal cycling Solder joint cross-sectioning and metallurgical analysis
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16 Implementation Plan – Lead-free wave Lead-free wave and selective solder Select no-clean, lead-free compatible flux with distribution & technical support in China, Europe, US Select bar solder alloy SAC305 used in recent trial Upgrade or replace wave and selective solder equipment Optimize profiles Verify solder joint quality, minimum solder balls Reliability testing by product HALT Thermal cycling Solder joint cross-sectioning and metallurgical analysis
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17 Implementation Plan – Lead-free rework Lead-free rework and repair Select no-clean, lead-free SnAgCu wire and flux with distribution & technical support in China, Europe, US Upgrade or replace hand solder equipment Develop process to segregate SnAgCu and SnPb rework Ensure that SnPb soldered assemblies are reworked with SnPb Ensure that SnAgCu soldered assemblies are reworked with SnAgCu Reliability testing by product HALT Thermal cycling Solder joint cross-sectioning and metallurgical analysis Implement lead-free rework and repair
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18 Implementation Plan – customer notification Product level PCN sent to customers when: Lead-free PWB finish implemented Lead-free processes qualified and implemented Product level qualification passed Actual or by similarity Will not claim RoHS compliance until RoHS-free BOM can be guaranteed Reference “IPC Lead-free 2” Final RoHS compliance statement still to be defined Some customers will require a unique product TLA
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19 RoHS compliance verification The following method is proposed for RoHS compliance verification: Product will be ground, aqua regia leached Presence and concentration of Cd, Cr+6, Hg, Pb identified by ICP-AES or ICP-SFMS and reported as a percentage of product weight Presence of PBB and PBDE identified by solvent extraction and measurement by GC-MS
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20 Implementation Timeline
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21Glossary Bi – bismuth Cd – cadmium Cr+6 – hexavalent chromium ENIG – electroless nickel, immersion gold FIFO – first in, first out GC-MS – gas chromatography- mass spectrometry HALT – highly accelerated life testing HASS – highly accelerated stress streening Hg – mercury ICP-AES – inductively coupled plasma – optical emission spectrometry ICP-SFMS – inductively coupled plasma – sector mass spectrometry MSL – moisture sensitive level OSP – organic solder preservative Pb – lead PBB – polybrominated biphenyl PBDE – polybrominated diphenyl ether PCN – process change notification PWB – printed wiring board QML – qualified manufacturer list RoHS – “Reduction of Hazardous Substances” legislation SAC305 – solder alloy containing Sn with 3% Ag by weight, 0.5% Cu by weight SMT – surface mount technology SnAgCu – tin-silver-copper SnPb – tin-lead TLA – top level assembly
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22Assistance Please contact the following Lead-free/RoHS compliance team members with questions, complaints and requests for assistance: Wayne Fitzgerald, Project manager, Youghal Roger Brandt, CE, Tucson Susan Johnston, Director component engineering, EDP Kathy Teuber, ME, Westminster Dave Widmer, Global Material System Manager/Commodity Manager, RWF Susie Worden, Global Material System Coordinator, RWF
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