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E-raamat: Contamination of Electronic Assemblies

  • Formaat: 232 pages
  • Ilmumisaeg: 12-Nov-2002
  • Kirjastus: CRC Press Inc
  • Keel: eng
  • ISBN-13: 9781420040067
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  • Formaat: 232 pages
  • Ilmumisaeg: 12-Nov-2002
  • Kirjastus: CRC Press Inc
  • Keel: eng
  • ISBN-13: 9781420040067
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Contamination problems have become a major factor in determining the manufacturability, quality, and reliability of electronic assemblies. Understanding the mechanics and chemistry of contamination has become necessary for improving quality and reliability and reducing costs of electronic assemblies. Designed as a practical guide, Contamination of Electronic Assemblies presents a generalized overview of contamination problems and serves as a problem-solving reference point. It takes a step-by-step approach to identifying contaminants and their effects on electronic products at each level of manufacture.

The text is divided into four sections: Laminate Manufacturing, Substrate Fabrication, Printed Wiring Board Assembly, and Conformal Coatings. These sections discuss all aspects of contamination of electronic assemblies, from the manufacture of glass fibers used in the laminates to the complete assembly of the finished product. The authors present detection and control methods that can help you reduce defects during the manufacturing process. With tables, figures, and fishbone diagrams serving as a quick reference, Contamination of Electronic Assemblies will help you familiarize yourself with the origination, detection, measurement, control, and prevention of contamination in electronic assemblies.
Preface i
Introduction ix
PART 1 -- LAMINATE MANUFACTURING
Contaminant Sources in Laminates
1(8)
Glass Fibers
2(1)
Fiber Treatment Agents
3(1)
Epoxy Resin
4(1)
Copper Cladding
5(1)
Volatile Matter
6(1)
Summary of Contaminants
6(3)
Measuring Contaminants in Laminates
9(2)
Quality and Reliability of Laminates
11(12)
Weave Exposure and Weave Texture
11(1)
Pits and Microvoids
12(1)
Measling and Crazing
12(2)
Blistering and Delamination
14(2)
Foreign Inclusions
16(1)
Hollow Fibers
16(2)
Conductive Filament Formation
18(3)
Resin Reversion
21(2)
Control Methods in Laminate Manufacturing
23(10)
Manufacturing Process Assessment
23(1)
Quality Assurance Through Certification
23(1)
Statistical Process Control
23(1)
Optimization
24(1)
Cleaning
24(1)
Best Practices
24(1)
Control Monitoring Through Testing
24(1)
Visual Inspection
24(1)
Glass Transition Temperature Testing
25(1)
Flame Retardant Content Measurement
25(1)
Prepreg Resin Content Measurement
25(1)
Copper Foil Surface Inspection
25(1)
Root Cause Analysis
25(1)
Material Traceability
26(1)
Corrective and Preventive Actions
26(1)
Documentation
26(1)
Supply Chain Assessment
26(7)
Vendor Assessment
26(3)
Consumables Applied during Manufacturing
29(1)
Shipping, Handling, and Storage
29(4)
PART 2 -- SUBSTRATE FABRICATION
Contaminant Sources in Substrates
33(12)
Plant Air and Machinery
33(2)
Abrasive Brushing
35(1)
Chemical Pre-treatment
36(1)
Imaging
36(1)
Electroplating
37(1)
Electroless and Immersion Plating
37(1)
Etching
38(1)
Tinning and Fusing Operations
39(1)
Solder Masking
40(1)
Drying
40(1)
Handling and Packaging
40(1)
Summary of Contaminants
41(4)
Measuring Contaminants in Substrates
45(4)
Quality and Reliability of Substrates
49(12)
Nonwetting and Dewetting
49(2)
Plating Voids
51(1)
Haloing
52(1)
Lifted Lands
53(1)
Resist Deadhesion
53(2)
Resist Blistering and Waving
55(1)
Vesication
55(2)
Soda Strawing
57(1)
Blistering
57(1)
Delamination
58(1)
Particle Contamination
58(3)
Control Methods in Substrate Manufacturing
61(14)
Manufacturing Process Assessment
61(1)
Quality Assurance Through Certification
61(1)
Statistical Process Control
62(1)
Cleaning
62(1)
Best Practices
62(1)
Control Monitoring through Testing
62(4)
Visual Inspection
63(1)
Automated Optical Inspection
63(1)
Plated Through Hole Reliability Test
63(1)
Insulation Reliability Testing
64(1)
Electrical Continuity Testing
64(2)
Physics of Failure Based Root Cause Analysis
66(1)
Material Traceability
66(1)
Corrective and Preventive Actions
66(1)
Documentation
67(1)
Supply Chain Assessment
67(4)
Shipping, Handling, and Storage
71(4)
PART 3 -- PRINTED WIRING BOARD ASSEMBLY
Contaminant Sources in Printed Wiring Board Assembly
75(34)
Receiving and Handling
75(10)
Fingerprints
75(1)
Gloves
76(1)
Food, Drink, and Tobacco
76(1)
Airborne Particles
76(8)
Tools
84(1)
Fault Markers
85(1)
Storage
85(1)
Components
86(2)
Assembly
88(18)
Temporary Masking
88(1)
Component Mounting
89(1)
Fluxing
89(5)
Rosin
94(1)
Water-Soluble
94(1)
Synthetic Activated
95(1)
Low Solids
95(1)
Soldering
96(3)
Blowholes
99(2)
Cleaning
101(1)
Conformal Coating
102(1)
Testing
102(3)
Repair and Rework
105(1)
Use Conditions
106(3)
Measuring Contaminants in Printed Wiring Assemblies
109(6)
Testing for Ionics
109(2)
Ionic Contamination Test
110(1)
Ion Chromatography
110(1)
Omega Meter and Ionograph
111(1)
Testing for Nonionics
111(2)
High-performance Liquid Chromatography
111(1)
Ultraviolet/Visible Spectrophotometry
112(1)
Coulometry
112(1)
Turbidimetry
113(1)
Surface Insulation Resistance Test
113(1)
Electromigration Test
114(1)
Quality and Reliability of Printed Wiring Assemblies
115(10)
Flux Residues
115(1)
Particulate Matter
115(2)
White Residues
117(1)
Solder Voids
118(1)
Corrosion
118(3)
Coating Deadhesion
121(2)
Black Pad
123(2)
Contamination Removal
125(26)
Abrasive Cleaning
127(1)
Solvent Cleaning
128(10)
Alcohols
129(1)
Methyl Alcohol
129(1)
Ethyl Alcohol
129(2)
Isopropyl Alcohol
131(1)
Ketones
131(1)
Hydrocarbons
132(1)
Terpenes
132(1)
Halogenated Solvents
133(1)
Chlorinated
133(1)
Fluorinated
134(1)
Decomposition
135(1)
Solvent Cleaning Equipment
136(2)
Safety and Environmental Concerns
138(1)
Solvent Alternatives
138(1)
Aqueous Cleaning
138(5)
Water
139(1)
Neutralizers and Rinse Aids
139(1)
Saponifiers
140(1)
Defoamers
141(1)
Surfactants
142(1)
Aqueous Cleaning Equipment
142(1)
Semiaqueous Cleaning
143(1)
Emulsion Cleaning
144(1)
Ultrasonic Cleaning
145(1)
Plasma Cleaning
145(1)
Selecting a Cleaning Method
146(1)
Drying
147(1)
Heat
147(1)
Vacuum
148(1)
No Clean
148(3)
PART 4 -- CONFORMAL COATINGS
Conformal Coatings
151(24)
Types of Conformal Coatings
152(3)
Urethanes (UR)
152(1)
Silicone (SR)
152(1)
Acrylic (AR)
153(1)
Epoxy (ER)
153(1)
Parylene (XY)
153(2)
Material Properties
155(1)
Application Techniques
155(5)
Brush
157(1)
Dip
157(1)
Spray
158(1)
Wave
158(1)
Vacuum Deposition
159(1)
Needle Based Selective Dispensing Systems
159(1)
Summary of Application Techniques
160(1)
Curing Methods
160(2)
Ultraviolet
161(1)
Two-Component
161(1)
Thermal
161(1)
Moisture
162(1)
Coating Removal
162(7)
Chemical
163(2)
Mechanical
165(1)
Abrasive
165(2)
Thermal
167(1)
Laser
167(1)
Plasma Etching
168(1)
Reliability of Conformal Coatings
169(1)
Environmental Concerns
170(1)
Selection Trade-Offs
171(4)
Glossary 175(20)
References 195(12)
Index 207


Bumiller, Elissa M.; Douthit, David A.; Pecht, Joan