Knowledge Hub
Your Gateway to Technical Knowledge Exchange for the Global Electronics Community
Explore our database of industry knowledge that fuels innovation, learning, and professional growth. Knowledge Hub is a collection of conference technical papers, webinars, presentations, on-demand video and more. You can search by author, title, keyword and type of content. You can also search for keywords and topics in the Tag field. Access to Knowledge Hub is reserved for members.
The Role of Permeability and Ion Transport In Conformal Coating Protection
The level of protection offered by a range of conformal coatings on electronic assemblies has been evaluated. The role of permeability and ion transport is the primary interest. Testing was car
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The Ems Market for Tier II & III Providers
In the global Electronic Manufacturing Services (EMS) market,we constantly hear news of the major ("Big 6") players—Foxconn,Flextronics,Sanmina-SCI,Solectron,Celestica,Jabil—as well as others.
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Increasing Profitability through Process Optimization: Better Than Outsourcing
Research has shown that U.S. companies can realize higher profits over outsourcing by putting their houses in order and finetuning their production processes,with automation being a key contrib
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BGA Solder Joint Mechanical Risk Assessment during System Level Shock Test
The pressure to reduce overall form-factor size in the high volume chassis desktop market is driving the need to integrate components at the system level. Adding to the challenge of size reduct
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THE EFFECT OF FILLING VIA-IN-PAD ON VOIDING RATES IN PWB ASSEMBLY FOR BGA COMPONENTS
The debate on the effect of voiding on BGA reliability has continued for years. Many PWB assemblers strive to minimize voiding,particularly with the advent of lead-free processing and in fine f
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Aerospace Response to Lead-free Solder - A Program Manager’s Guide
On July 1,2006,lead and certain other hazardous materials were banned from most forms of new electronic equipment in the countries of the European Union. Although most aerospace products are no
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Experience in Processing EEE Components with Pure Electroplated Tin Leads As a
The regulatory measures defined in MIL performance standards that govern production of active and passive electronic components ban the application of pure Sn plated leads for EEE parts. The st
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Examination of Common Delamination Resistance Tests for Electrical Grade
The delamination of electrical grade laminates continues to be a vexing problem for the printed circuit board industry. Laminates are commonly tailored to meet specific thickness and dielectric
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Lead Free Assembly Impacts on Laminate Material Properties and “Pad Crater” Failures
Printed circuit board (PCB) feature sizes are decreasing to support increasing density thrusts for electronic products and packaging. The transition to lead-free products has changed the stress
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Comparative Study of Phosphorus-based Flame Retardants in Halogen-Free Laminates
This paper compares performance of two phosphorus-based flame retardants: poly-(m-phenylene methyl phosphonate) (PPMP) recently introduced to the market and 9,10-dihydro-9-oxa-10-phosphenanthre
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VERIFYING MICROVOID ELIMINATION AND PREVENTION VIA AN OPTIMIZED IMMERSION SILVER PROCESS
The Pb-free transition in the electronics industry has seen immersion silver emerge as a leading circuit board finish for RoHS compliant processes and products. It is utilized in a wide cross-s
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A STUDY OF PLANAR MICROVOIDING IN Pb-FREE SOLDER JOINTS
Planar microvoids have been observed on second level interconnections between solder metallizations and copper lands on PCB boards with immersion silver surface finish. These planar microvoids
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Corrosion Resistance of PWB Final Finishes
As the electronic industry is moving to lead-free PWB final finishes and high density circuit boards,the widely used PWB finish,SnPb HASL,has to be replaced with a lead-free and coplanar PWB fi
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Production Test Methodology to Determine High Frequency Signal Loss of PWB
A new low cost,simple and repeatable production test method for measuring signal loss of printed wiring board (PWB) interconnects is discussed. The method uses Time Domain Reflectometry (TDR) t
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The Socketless Revolution Larger Probes on Smaller Center Test Targets Application of the Socketless Probe Technology to PCB Manufacturing and In-Circuit Test
As technology progresses,electronic components that do bigger and better things are hitting the market. At the same time,the size of the PCB is shrinking. While circuit board designers could re
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Reflow Process Control Monitoring,and Data Logging
With the introduction of lead free electronics assembly worldwide,greater concerns are raised over factory control of materials and processes. Due to the mix of both leaded and lead free produc
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Laser Cutting - a Novel Method of Depaneling
There are many issues to be considered in the manufacturing of state-of-the-art electronic products. Today's electronic devices,whether based on flexible (FPC) or rigid (PCB) printed circuit bo
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Performance of China Alloy SnAgCuCe in Reflow Soldering
Work on assisting China's Ministry of Information Industry (MII) to assess the performance of a solder paste using the China alloy Sn3.0Ag0.5Cu0.019Ce (SACCe) was completed. Two Indium fluxes w
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The Lead-Free Wave Solder Process and Its Effect on Laminates
The pressure on manufacturers of electronic devices to continually reduce the cost of products has continued,despite the challenges of higher cost lead-free production. In many cases assemblers
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The Lead-Free Wave Solder Process and Its Effect on Laminates
The pressure on manufacturers of electronic devices to continually reduce the cost of products has continued,despite the challenges of higher cost lead-free production. In many cases assemblers
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Effects of Reflow Profile and Thermal Shock on Intermetallic Compound Thickness for SnPb and SnAgCu Solder Joints
During the solder reflow processes many reactions occur. There is the reduction of oxides on the metal surfaces,metal dissolution,wetting to different surfaces,and intermetallic compound format
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A Method to Evaluate PCBA Suppliers’ Pb Free vs. Leaded Processes for Telecom
The purpose of this program was to evaluate the solder joint reliability,using the IPC-9701 standard as a guideline,of PCBAs that were assembled with conventional leaded and ROHS compliant lead
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Durability of Repaired and Aged Lead-free Electronic Assemblies
The reliability of aged and repaired lead-free and mixed lead-free/lead-based solder interconnects is an important issue for electronic equipment manufacturers. As a result of the global transi
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Durability of Repaired and Aged Lead-free Electronic Assemblies
The reliability of aged and repaired lead-free and mixed lead-free/lead-based solder interconnects is an important issue for electronic equipment manufacturers. As a result of the global transi
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Thin Film Embedded Resistor Processing in Sequential Lamination Printed Circuit
New interconnect technologies continue to shrink feature size,increase routing complexity and component density in multilayer rigid and rigid-flex printed circuits. Printed circuit fabricators
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