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Design for Reliability: PCBsNorth T
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Course OutlineINTRODUCTIONSooIntro
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Why Design for Reliability (DfR)?o
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Physics of Failure DefinitionsoFail
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A Word on Quality, Reliability & Cl
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PCB Materials / Laminate Selectiono
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Laminate DatasheetsooOut-of-plane C
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Glass StyleoooPCB laminates (and pr
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Laminate Properties (cont.)oMore re
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Thermal Parameters and IPC Slash Sh
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PTV Degradation due to Assembly© 2
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PCB Materials: StackupoMaximum stre
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PCB ViasPlated Through Holes© 2004
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How to Design a Reliable PTV?PTH Ar
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PCB Industry PTV Capability95% of I
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IPC TR-579oRound Robin Reliability
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IPC TR-579 (cont.)oDetermine strain
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IPC TR-579 (cont.)o Iteratively cal
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The Effect of Design Parameters (He
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Effect of Design Parameters (cont.)
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Plating (Thickness and Material Pro
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Case Study: Microvia Fill and PTV R
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Plating Mechanical PropertiesoIndus
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Cycles to FailureThe Reality of PTV
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Post-Plating MeasurementsoHardness
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Other Platings (cont.)oS. Neumann,
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Test / Qualify PTVoQualifying PTV i
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Simulation and ModelingoSecond step
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Initial Qualification (PCQR2)oQuali
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Lot QualificationoInterconnect stre
- Page 61 and 62: ConclusionoThe base knowledge and u
- Page 63 and 64: CAF: ExamplesInfluenced by electric
- Page 65 and 66: Strain Flexure Issues & Pad Crateri
- Page 67 and 68: Strain & Flexure: Pad CrateringoCra
- Page 69 and 70: Potential Mitigations to Pad Crater
- Page 71 and 72: Pad Geometry• Pad design influenc
- Page 73 and 74: Future of Contamination / Cleanline
- Page 75 and 76: Failure ModeoWhy do you care about
- Page 77 and 78: ECM MechanismsoooSome ECM Mechanism
- Page 79 and 80: Nominal Ionic LevelsooooBare printe
- Page 81 and 82: Process Material Qualification - SI
- Page 83 and 84: Importance of Surface FinishooooThe
- Page 85 and 86: Surface Finish Selection Approachoo
- Page 87 and 88: Surface Finish Selection GuidelineA
- Page 89 and 90: OSP Issues: Plated Through-Hole Fil
- Page 91 and 92: Surface Finish Selection GuidelineP
- Page 93 and 94: ImAg Trace EtchingSolder maskGalvan
- Page 95 and 96: Typical Creep Corrosion• Corrosio
- Page 97 and 98: Wetting Force ( mN/mm)Impact of Tar
- Page 99 and 100: Immersion Sn (ImSn)• A single mat
- Page 101 and 102: Surface Finish Selection GuidelineP
- Page 103 and 104: ENIG - Ni Interface Issues w/ SACBr
- Page 105 and 106: Unreliability, F(t)ENIG: Mechanical
- Page 107 and 108: Surface Finish Selection GuidelineP
- Page 109 and 110: Pb-Free HASL: Ni-modified SnCuoAllo
- Page 111: Newer Finishes to the MarketProduct
- Page 115 and 116: Examples of Best Application Fitsoo
- Page 117 and 118: What to do if there is no SF fit?oo
- Page 119 and 120: SummaryoooooThe surface finish you
- Page 121 and 122: ConclusionsoooDesign for Reliabilit
- Page 123: Contact Information• Questions?