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.
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Lead Free Solder Paste Printing: Stencil and Squeegee Blade Impact
Rarely does a day pass by without a discussion centered on lead free manufacturing and it’s future impact on global
electronics assembly. The WEEE and RoHS directives drafted in January 2003 wi
.. read more
Novel High Temperature Resistant OSP Coatings for Lead-free Processing
In order to meet the growing requirement of eliminating lead from electronics,the printed wiring board (PWB) industry is migrating from hot-air-leveled solder (Sn/Pb) to lead free compatible al
.. read more
Understanding Stencil Requirements for a Lead Free Mass Imaging Process
Many words have been written about the impending lead free transition,during this period of frantic discovery lots has
been communicated about the reflow and alloy concerns; But the print proce
.. read more
Assembly Verification of an Immersion Silver Finish with Enhanced Tarnish Inhibition
New ROHS standards are forcing the electronics industry to find a replacement for leaded surface finishes. Even more
rapidly than the legislative decision to move away from lead,electronics wer
.. read more
Characterization of the Thermal Stability of Electrical Laminates Suitable for Lead-Free Soldering
Lead-free soldering is expected to become the new standard in the future. Different legislations or draft directives target the restriction or the ban of the use of lead in the world. As an exa
.. read more
Practical Lead-Free Implementation
Environmental regulations are forcing the elimination of lead (Pb) from electronic equipment. 2005 will be the year that
many electronics assemblers will be transitioning their soldering proces
.. read more
Optimization of Lead-Free Soldering Processes for Volume Manufacturing
In this paper,a comprehensive review is provided on the optimization of soldering processes (including reflow,wave
soldering,and rework),for different component types,different PCB sizes and fi
.. read more
Lead-Free Solder Flip Chips on FR-4 Substrates with Different Assembly Processes and Materials
This study is focused on using different assembly options such as dip fluxing,flux jetting and reflow encapsulate for 200-
250um pitch lead-free (SnAgCu) flip chips on FR4 substrates. The impac
.. read more
New Concept Multi-Layer FPC “SBic” For High-Density Device Mounting
We have developed a thin,high-density device-mounting,multilayer flexible printed circuit (hereinafter flexible printed
circuit is referred to as FPC) “SBic” (stands for Solder Bump Interconnec
.. read more
Perspectives on Repaired Lead-Free Solder Joints
The use of lead-free (LF) solders as a replacement for traditional tin-lead (SnPb) solders in military and high reliability
applications has a number of technical challenges unique to the indus
.. read more
Test and Inspection of Lead-Free Assemblies
Major industrial nations,around the world,are rapidly moving to eliminate lead from the electronic manufacturing processes.
While some companies are taking advantage of the situation and are us
.. read more
Erosion of Copper and Stainless Steels by Lead-Free-Solders
An issue that has emerged from the increasing use by the electronics industry of lead-free solders in mass production wave
soldering is the erosion of the copper of printed circuit board patter
.. read more
Effect of Transient Thermal Profiles in Wave Soldering Processes on Connector Performance
Developing lead free connector products involves at least two distinct steps: removing the lead from the product and ensuring
the product has sufficient thermal stability. Lead is most commonly
.. read more
Lead-Free and Mixed Assembly Solder Joint Reliability Trends
This paper presents a quantitative analysis of solder joint reliability data for lead-free Sn-Ag-Cu (SAC) and mixed assembly
(SnPb + SAC) circuit boards based on an extensive,but non-exhaustive
.. read more
Lead Free Conversion Analysis for Multiple PWB/Component Materials and Finishes using Quality and Reliability Testing
The world-wide movement to phase out lead from electronic products presents many challenges for companies throughout
the electronics supply chain. The University of Massachusetts Lowell has bro
.. read more
Are Lead-free Assemblies Especially Endangered by Climatic Safety?
The ever-increasing use of high frequency in high density interconnect (HDI) assemblies,combined with the worldwide
move toward lead-free manufacturing,has initiated a closer scrutiny towards e
.. read more
Printed Circuit Board Reliability in High Temperature
This paper will demonstrate the effect high reflow temperatures in lead free processes will have on the reliability of printed
circuit boards from a broad range of laminate materials for both t
.. read more
Lead-Free Implementation: Drop-In Manufacturing
The Lead-free electronics manufacturing has become a reality. As of this writing,a few manufacturers have rightfully
reported their total completion to Lead-free production across all facilitie
.. read more
When are Conductive Adhesives an Alternative to Solder?
Conductive adhesives (CAs) have been an important problem-solving class of assembly materials for decades,but primarily
as die attaches products,ever since they replaced metallurgical systems.
.. read more
Lead and Lead-free Solder Project LCIA Characterization Methods
This paper describes the life-cycle impact assessment methodology developed by the University of Tennessee to calculate
the impacts resulting from the use of lead and lead-free solders during t
.. read more
HDPUG's Design for Lead-Free Solder Joint Reliability of High-Density Packages
The lead-free solder-joint reliability of the high-density packages,256-pin PBGA (plastic ball grid array),388-pin
PBGA,and 1657-pin CCGA (ceramic column grid array),on PCB (printed circuit boa
.. read more
Novel,VOC-Compliant Aqueous Cleaning Agents for Post-Solder Defluxing
To meet today’s environmental demands,new VOC-free and low-VOC cleaning agents have been formulated that exhibit
outstanding cleaning performance for a variety of flux residues. The new cleanin
.. read more
HDPUG's Reliability Testing and Data Analysis of High-Density Packages Lead-Free Solder Joints
Temperature cycling test and statistical analysis of various high-density packages on PCBs with SnCu HASL,NiAu,
and OSP finishes are investigated in this study. Emphasis is placed on the determ
.. read more
Board Finish Solderability with Sn-Ag-Cu
Lead-free soldering technology is still in its infancy with technical and cost issues posing major challenges for the
industry. It is expected that soldering in a nitrogen atmosphere might over
.. read more
Preliminary Study on Lead-free Sn42Bi57Ag1 Solder Paste
With the growth of the concern on the environment,more and more efforts have been done to protect the earth,to
minimize the pollution on the environment. The use of the lead free solder is repl
.. read more
Electroplating and Properties of Lead-Free Finishes
Tin alloys such as Sn 0.7% Cu and Sn 2%Bi were identified as a viable alternative to tin-lead finish. Electroplating
of these alloys is challenging because of great difference in reduction pote
.. read more
Investigating Mass Imaging Lead Free Materials Using Enclosed Print Head Technology
Within the Surface Mount Assembly (S.M.A.) process,solder paste is primarily used as a mechanical and electrical
connection. Solder paste is generally deposited using a mass imaging process,suc
.. read more
Testing and Analysis of Surface Mounted Lead Free Soldering Materials and Processes
The Massachusetts Toxics Use Reduction Institute (TURI) has sponsored a consortium of Massachusetts based
corporations to investigate lead-free (Pb-free) surface mount soldering technology. The
.. read more
Finally! Practical Guidelines for Achieving Successful Lead-Free Assembly
With the Waste Electrical and Electronic Equipment
(WEEE) Directive in Europe outlawing lead from
many electronic devices produced and imported in
the EU by July 2006,as well as with foreign
co
.. read more
Lead Free Solder Paste Printing: Stencil and Squeegee Blade Impact
Rarely does a day pass by without a discussion centered on lead free manufacturing and it’s future impact on global
electronics assembly. The WEEE and RoHS directives drafted in January 2003 wi
.. read more
Novel High Temperature Resistant OSP Coatings for Lead-free Processing
In order to meet the growing requirement of eliminating lead from electronics,the printed wiring board (PWB) industry is migrating from hot-air-leveled solder (Sn/Pb) to lead free compatible al
.. read more
Understanding Stencil Requirements for a Lead Free Mass Imaging Process
Many words have been written about the impending lead free transition,during this period of frantic discovery lots has
been communicated about the reflow and alloy concerns; But the print proce
.. read more
Assembly Verification of an Immersion Silver Finish with Enhanced Tarnish Inhibition
New ROHS standards are forcing the electronics industry to find a replacement for leaded surface finishes. Even more
rapidly than the legislative decision to move away from lead,electronics wer
.. read more
Characterization of the Thermal Stability of Electrical Laminates Suitable for Lead-Free Soldering
Lead-free soldering is expected to become the new standard in the future. Different legislations or draft directives target the restriction or the ban of the use of lead in the world. As an exa
.. read more
Practical Lead-Free Implementation
Environmental regulations are forcing the elimination of lead (Pb) from electronic equipment. 2005 will be the year that
many electronics assemblers will be transitioning their soldering proces
.. read more
Optimization of Lead-Free Soldering Processes for Volume Manufacturing
In this paper,a comprehensive review is provided on the optimization of soldering processes (including reflow,wave
soldering,and rework),for different component types,different PCB sizes and fi
.. read more
Lead-Free Solder Flip Chips on FR-4 Substrates with Different Assembly Processes and Materials
This study is focused on using different assembly options such as dip fluxing,flux jetting and reflow encapsulate for 200-
250um pitch lead-free (SnAgCu) flip chips on FR4 substrates. The impac
.. read more
New Concept Multi-Layer FPC “SBic” For High-Density Device Mounting
We have developed a thin,high-density device-mounting,multilayer flexible printed circuit (hereinafter flexible printed
circuit is referred to as FPC) “SBic” (stands for Solder Bump Interconnec
.. read more
Perspectives on Repaired Lead-Free Solder Joints
The use of lead-free (LF) solders as a replacement for traditional tin-lead (SnPb) solders in military and high reliability
applications has a number of technical challenges unique to the indus
.. read more
Test and Inspection of Lead-Free Assemblies
Major industrial nations,around the world,are rapidly moving to eliminate lead from the electronic manufacturing processes.
While some companies are taking advantage of the situation and are us
.. read more
Erosion of Copper and Stainless Steels by Lead-Free-Solders
An issue that has emerged from the increasing use by the electronics industry of lead-free solders in mass production wave
soldering is the erosion of the copper of printed circuit board patter
.. read more
Effect of Transient Thermal Profiles in Wave Soldering Processes on Connector Performance
Developing lead free connector products involves at least two distinct steps: removing the lead from the product and ensuring
the product has sufficient thermal stability. Lead is most commonly
.. read more
Lead-Free and Mixed Assembly Solder Joint Reliability Trends
This paper presents a quantitative analysis of solder joint reliability data for lead-free Sn-Ag-Cu (SAC) and mixed assembly
(SnPb + SAC) circuit boards based on an extensive,but non-exhaustive
.. read more
Lead Free Conversion Analysis for Multiple PWB/Component Materials and Finishes using Quality and Reliability Testing
The world-wide movement to phase out lead from electronic products presents many challenges for companies throughout
the electronics supply chain. The University of Massachusetts Lowell has bro
.. read more
Are Lead-free Assemblies Especially Endangered by Climatic Safety?
The ever-increasing use of high frequency in high density interconnect (HDI) assemblies,combined with the worldwide
move toward lead-free manufacturing,has initiated a closer scrutiny towards e
.. read more
Printed Circuit Board Reliability in High Temperature
This paper will demonstrate the effect high reflow temperatures in lead free processes will have on the reliability of printed
circuit boards from a broad range of laminate materials for both t
.. read more
Lead-Free Implementation: Drop-In Manufacturing
The Lead-free electronics manufacturing has become a reality. As of this writing,a few manufacturers have rightfully
reported their total completion to Lead-free production across all facilitie
.. read more
When are Conductive Adhesives an Alternative to Solder?
Conductive adhesives (CAs) have been an important problem-solving class of assembly materials for decades,but primarily
as die attaches products,ever since they replaced metallurgical systems.
.. read more
Lead and Lead-free Solder Project LCIA Characterization Methods
This paper describes the life-cycle impact assessment methodology developed by the University of Tennessee to calculate
the impacts resulting from the use of lead and lead-free solders during t
.. read more
HDPUG's Design for Lead-Free Solder Joint Reliability of High-Density Packages
The lead-free solder-joint reliability of the high-density packages,256-pin PBGA (plastic ball grid array),388-pin
PBGA,and 1657-pin CCGA (ceramic column grid array),on PCB (printed circuit boa
.. read more
Novel,VOC-Compliant Aqueous Cleaning Agents for Post-Solder Defluxing
To meet today’s environmental demands,new VOC-free and low-VOC cleaning agents have been formulated that exhibit
outstanding cleaning performance for a variety of flux residues. The new cleanin
.. read more
HDPUG's Reliability Testing and Data Analysis of High-Density Packages Lead-Free Solder Joints
Temperature cycling test and statistical analysis of various high-density packages on PCBs with SnCu HASL,NiAu,
and OSP finishes are investigated in this study. Emphasis is placed on the determ
.. read more
Board Finish Solderability with Sn-Ag-Cu
Lead-free soldering technology is still in its infancy with technical and cost issues posing major challenges for the
industry. It is expected that soldering in a nitrogen atmosphere might over
.. read more
Preliminary Study on Lead-free Sn42Bi57Ag1 Solder Paste
With the growth of the concern on the environment,more and more efforts have been done to protect the earth,to
minimize the pollution on the environment. The use of the lead free solder is repl
.. read more
Electroplating and Properties of Lead-Free Finishes
Tin alloys such as Sn 0.7% Cu and Sn 2%Bi were identified as a viable alternative to tin-lead finish. Electroplating
of these alloys is challenging because of great difference in reduction pote
.. read more
Investigating Mass Imaging Lead Free Materials Using Enclosed Print Head Technology
Within the Surface Mount Assembly (S.M.A.) process,solder paste is primarily used as a mechanical and electrical
connection. Solder paste is generally deposited using a mass imaging process,suc
.. read more
Testing and Analysis of Surface Mounted Lead Free Soldering Materials and Processes
The Massachusetts Toxics Use Reduction Institute (TURI) has sponsored a consortium of Massachusetts based
corporations to investigate lead-free (Pb-free) surface mount soldering technology. The
.. read more
Finally! Practical Guidelines for Achieving Successful Lead-Free Assembly
With the Waste Electrical and Electronic Equipment
(WEEE) Directive in Europe outlawing lead from
many electronic devices produced and imported in
the EU by July 2006,as well as with foreign
co
.. read more