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QFN Thermal Pad Design for Void Minimization

Different types of components with soldered bottom terminations are increasingly used in the electronics industry with the principal objective to improve heat dissipation. The larg .. read more
Author(s)
Lars Bruno, Benny Gustafson, Yohann Morandy
Event
IPC APEX EXPO 2023

A Novel Copper Via Filling Electrolyte for Plating on IC Substrates

The Semi-Additive Process (SAP) is a standard process to enable very fine lines and spaces to produce highly sophisticated Integrated Circuit Substrates (ICS). When operating with lines and .. read more
Author(s)
Mustafa Özkök, Hee-Bum Shin, Henning Hübner, Grigory Vazhenin
Event
IPC APEX EXPO 2023

Novel Surface Finish for 5G-mmWave frequency PCB Technologies- How to Achieve Optimum Signal Integrity

The next generation devices using high frequency of 5G to mmWave and greater has called for innovation in materials used in electronics manufacturing to realize the optimum signal integrity .. read more
Author(s)
Kunal Shah Ph.D.
Event
IPC APEX EXPO 2023

Reassessing Surface Finish Performance for Next Generation Technology

PCB Fabricators have long since abandoned Hot-Air Levelling, with several alternative final finishes (ImAg, ImSn, OSP, ENIG and ENEPIG) now well established as having a track record of meeti .. read more
Author(s)
Frank Xu Ph.D., Martin Bunce, Ernie Long Ph.D., Jim Watkowski
Event
IPC APEX EXPO 2023

A High Thermal Performance Die Attaching Paste based on Hybrid Pressure-less Silver Sintering Technology for Aerospace Application

Aerospace and defense applications present unique challenges for material suppliers. As increasingly adoption of wide bandgap semiconductor materials and advanced diverse accessible heteroge .. read more
Author(s)
Yuan Zhao, Bruno Tolla, Doug Katze, Glenda Castaneda, John Wood, Jo-Anne Wilson, David Brand
Event
IPC APEX EXPO 2023

Failure Characteristics of PCBs in Automotive EV Powertrain Applications and Solution Proposals to Improve Reliability and Robustness

The rapid change to and steep rise of electric vehicles (EV) results in many challenges for the design, manufacturing, testing, and the understanding of reliability and robustness for printe .. read more
Author(s)
Dr.-Ing. Walter Olbrich
Event
IPC APEX EXPO 2023

Expandable Bio-based Polymers: A Lightweight Future for Electronics Ruggedization – Immersion Study

“Light weighting” has become an important trend in numerous manufacturing divisions. Lightweight materials are particularly valuable in any portable device including mass transit systems, au .. read more
Author(s)
Beth Turner
Event
IPC APEX EXPO 2023

Selective Solder Nozzles: Insight Into Wear Mechanisms and Future Developments

Selective soldering utilizes wettable metal nozzles for controlled application of solder to components. The wetting of solder to the nozzles is part of a complex mechanism that causes wear o .. read more
Author(s)
Samuel J. McMaster Ph.D, Andrew Cobley, Nigel Monk, John E. Graves
Event
IPC APEX EXPO 2023

New Soldering Technology for High and Mixed-Volume Through-Hole Pin Devices

Surface mount technology was developed in the 1960s and implemented on printed circuit boards in the 1980s. High-density electronic assemblies are dominated nowadays by surface mount devices .. read more
Author(s)
Gerjan Diepstraten
Event
IPC APEX EXPO 2023

Photonic Soldering of Wafer-level Chip-scale Packaged Components on Polyethylene Terephthalate Flex Board

Advanced implementation of wearables and IOT applications require attachment of components on lightweight, mechanically flexible, and low-cost substrates. Candidate materials that meet these .. read more
Author(s)
Harry Chou Ph.D, Ara Parsekian Ph.D, Nikhil Pillai, Ian Rawson, Rudy Ghosh Ph.D, Vahid Akhavan Ph.D
Event
IPC APEX EXPO 2023

Gold Brush Plating Rework of Power Logic Circuit Card Assembly in an Aerospace Electronic Application

Selective electrodeposition (brush plating) was successfully used to rework a solder-contaminated, hard gold-plated copper flag connector for a circuit card assembly (CCA). The localized rep .. read more
Author(s)
Kevin R. Chasse, Daniel N. Urban, John P. Dahill, and Kurt V. Delorenzo
Event
IPC APEX EXPO 2019

iNEMI General Purpose Flowers of Sulfur Corrosion Chamber

The iNEMI flowers of sulfur (FoS) corrosion chamber was developed to study creep corrosion on printed circuit board assemblies(PCBAs). The chamber, typically run at 50 or 60oC, has corrosive .. read more
Author(s)
Prabjit Singh, Larry Palmer, Haley Fu, Dem Lee, Jeffrey Lee, Karlos Guo, Jane Li, Chen Xu, Simon Lee and Geoffrey Tong
Event
IPC APEX EXPO 2019

Reducing Dust Deposition on Electronic Equipment by Optimizing Cooling Air Flow Patterns

Environmental dust accumulation on electronic equipment can impact the performance and reliability of the equipment in various ways. This includes mechanical effects (such as obstructions of .. read more
Author(s)
Chen Xu, Jason Stafford*
Event
IPC APEX EXPO 2019

Electronic Board Defect Classification and Detection with Deep Learning

Inspection means have increasingly been incorporated into typical manufacturing of boards, substrates and/or systems. A significant number of automatic inspections rely on the analysis of im .. read more
Author(s)
Dan Sebban and Nissim Matatov
Event
IPC APEX EXPO 2019

Beyond The Hype -The Digital Twin Demystified

Digitalization changes everything, everywhere. It is inevitable, new business drivers are forcing the Electronics industry to rethink every element of their business. Virtually every company .. read more
Author(s)
David Rogers
Event
IPC APEX EXPO 2019

Energy Efficient Reflow Soldering Process Using Embedded Carbon Layers

As the reflow soldering process is the main energy consumer in a SMT assembly line, there is a high potential for cost reduction by significantly reducing the amount of energy needed. Meltin .. read more
Author(s)
Andreas Reinhardt, Arne Neiser
Event
IPC APEX EXPO 2019

Can 150μm Pitch Flip Chip be Done on Standard SMT Lines?

As miniaturization trends continue in the electronics industry, System in Package (SiP) technology is gaining more and more traction. In many ways, some SiP modules are just surface mount te .. read more
Author(s)
David Geiger, Howard Osgood, Robert Pennings
Event
IPC APEX EXPO 2019

Investigating the Metric 0201 Assembly Process

The advance in technology and its relentless develop mentis delivering yet another surface mount assembly challenge. To meet the market demand for products with higher functionality whilst r .. read more
Author(s)
Clive Ashmore
Event
IPC APEX EXPO 2019

Balancing Air Assisted Atomization for Improved Conformal Coating Quality

Polymer coating materials protect electronics from harsh environments, assuring safe and reliable performance. To reach the highest level of reliability, coatings must be selectively applied .. read more
Author(s)
Camille Sybert Tim Girvin
Event
IPC APEX EXPO 2019

Automated Conformal Coating of Circuit Card Assemblies Using Polyurethane Material

The development of an automated circuit card assembly(CCA)conformal coating process using a low outgassing polyurethane material was essential for meeting the increase in customer demand fro .. read more
Author(s)
Marissa Pati, AnaL. Campuzano-Contreras
Event
IPC APEX EXPO 2019

High Performance Light and Moisture Dual Curable Automotive Conformal Coating

Light-curable materials can provide significant benefits over conventional technologies, including lower operating costs driven by lower labor needs, space savings, lower energy demand, and .. read more
Author(s)
Aysegul Nebioglu, Chris Morrissey
Event
IPC APEX EXPO 2019

Future of “Substances and Materials in Products ”Data Exchange Formats as Standards

To support regulations on hazardous substances in materials and in products like the automotive EU End of Life Vehicle (ELV) directive, the Electronics and Electrical Equipment Restriction o .. read more
Author(s)
Jean-Pierre
Event
IPC APEX EXPO 2019

Endocrine Disrupting Chemicals and Bioaccumulative Substances –The Next Wave of Regulated Substances in Electronics

Until recently, virtually all restricted materials in electronics were classified as either carcinogens (e.g. Pb) or reproductive toxins (e.g. phthalates). Two new categories of restricted m .. read more
Author(s)
Bruce Calder
Event
IPC APEX EXPO 2019

High Frequency Due to Copper Topology Phase 2 Project –Final Report High Density Packaging User Group (HDP)

The High Density Packaging (HDP) User Group has completed a project based upon an earlier project evaluating the different types of high frequency test methods used in the industry for measu .. read more
Author(s)
Karl Sauter
Event
IPC APEX EXPO 2019

Moisture Effects on the High Frequency Testing of Laminates

Earlier HDP User Group project work that has been completed and published compared the different types of high frequency test methods used in the industry for measuring Dk and Df at high fre .. read more
Author(s)
Karl Sauter
Event
IPC APEX EXPO 2019

Tolerance Mistaken: Impacts of not properly addressing material, industry standards and assembly process limitations

As electronic assembly designs have increased in density and component packaging size and lead pitch have decreased in size, this has placed tighter requirements on manufacturing processes. .. read more
Author(s)
Dale Lee
Event
IPC APEX EXPO 2019

Electrical and Thermo-Mechanical Design Constraints Affecting System and Component Performance

This slide show presents solutions to the relevant Power Module question: "What has to be considered within a PCB, if currents with about 50 A and voltages above 500 V should be designed?"&n .. read more
Author(s)
Michael Schleicher
Event
IPC APEX EXPO 2019

The Importance of Non-Destructive Bare Board Inspection –Preventing Failure Before You Start Work

The operation and reliability of any electronic assembly is very dependent on the performance, quality and consistency of the bare printed circuit board (PCB). Without good quality bare boar .. read more
Author(s)
David Bernard, Bob Willis
Event
IPC APEX EXPO 2019

Analyzing a Printed Circuit Board with Oxide Residue

A number of similar Printed Wiring Assemblies (PWAs) had been subjected to final electrical tests on automated test equipment when a common test failure was recognized. All PWAs were failing .. read more
Author(s)
Wade Goldman , Andrew Dineen, Hailey Jordan, Curtis Leonard, Edward Arthur
Event
IPC APEX EXPO 2019

Outgassing Behaviour of SMT Flux Residue During Reflow Soldering

SMT-flux residues are feared to be a potential risk factor for quality issues in electronic assembly and interconnect technology. This work shows how the amount of no clean flux residues can .. read more
Author(s)
Theresia Richter, Shiyu Huang, Thomas Blank, Pierre Eckold, Lothar Henneken
Event
IPC APEX EXPO 2019

How to Manage Material Outgassing in Reflow Oven

In a lead-free reflow process, temperatures are higher, and materials use outgasses more than in a leaded reflow process. The trends toward higher density populated boards and more pin-in-pa .. read more
Author(s)
Gerjan Diepstraten
Event
IPC APEX EXPO 2019

Comparing Soldering Results of ENIG and EPIG Post Steam Exposure

ENIG, electroless nickel immersion gold is now a well-regarded finish used to enhance and preserve the solder-ability of copper circuits. EPIG, electroless palladium immersion gold, is a new .. read more
Author(s)
J. Bengston and R. DePoto
Event
IPC APEX EXPO 2019

Designing a High Performance Electroless Nickel and Immersion Gold to Maximize Highest Reliability

The latest highest reliability requirements demand a high performance electroless nickel and immersion gold (HP ENIG). The new IPC specification 4552A has refocused the industry with referen .. read more
Author(s)
Robert Spreemann, Rick Nichols, Sandra Nelle
Event
IPC APEX EXPO 2019

Multilayered Flexible Hybrid Screen Printed Circuits on Disposable Medical Grade Substrates

This paper details the realization of a multi-layered, printed, conformable hybrid circuit. The circuit was created using silver(Ag) flake ink as a conductive layer and UV acrylic-based ink .. read more
Author(s)
N. Richards, S. Stevens, N. Ghalib, M. Sussman, H. Ramirez, R. Hugeneck, G. Wable, J. Richstein, S.G.R. Avuthu
Event
IPC APEX EXPO 2019

Printed Electronics for Medical Devices

As is the case with many other markets where faster, highly capable technologies have resulted in more intelligent processes and products, the medical device sector is also undergoing a “sma .. read more
Author(s)
Jeff Grover
Event
IPC APEX EXPO 2019

Fabric Weaving and Circuit Orientations Impact for Skew / Signal Integrity

This Presentation discusses Improvements for signal integrity.  Signal integrity is based on the copper surface roughness, the oxides on the copper, and the Dielectric constant of the D .. read more
Author(s)
Eric Liao
Event
IPC APEX EXPO 2019

Innovations for future RF designs

This Slide show presents RF Cap Layers to normal FR4 Dielectric materials.  This material can be used in multiple configurations including Single sided, Double sided, and Hybrid.&n .. read more
Author(s)
Matthew Lake
Event
IPC APEX EXPO 2019

Higher Defluxing Temperature and Low Standoff Component Cleaning-A Connection?

OEMs and CMs designing and building electronic assemblies for high reliability applications are typically faced with a decision to clean or not to clean the assembly. If ionic residues remai .. read more
Author(s)
Jigar Patel and Umut Tosun
Event
IPC APEX EXPO 2019

Methodology for Developing Cleaning Process Parameters

Electronic assembly processes range from simple to complex and involve a wide range of materials to produce. Each step in the process and each assembly material used will have some impact on .. read more
Author(s)
Mike Bixenman, Mark McMeen, Vladimir Sitko, Axel Vargas
Event
IPC APEX EXPO 2019

IPC-J-STD-001 Rev G, Amendment 1, Section 8 Cleanliness SectionSIR Test Method for Developing Objective Evidence for the Production Assembly

Since the 1970s, ROSE testing was used to determine “clean enough.” In 2015, the J-STD-001 committee assigned a team to develop the next generation of “cleanliness” requirements. Section 8 d .. read more
Author(s)
Mark McMeen, Doug Pauls, Mike Bixenman
Event
IPC APEX EXPO 2019

Oxidation Resistant Nano-Cu Sintering Paste for Die Attach Applications

A nano-Cu pressureless sinterable paste was developed for joint formation applications. The material was further engineered in both chemistry and process for enhanced oxidation resistance. T .. read more
Author(s)
Min Yao, and Ning-Cheng Lee
Event
IPC APEX EXPO 2019

Fluxes Suppressing Non-Wet-Open at BGA Assembly

With the advancement in miniaturization, the die is getting thinner and the solder balls are getting smaller for BGAs. Consequently, the thermal warpage is getting more severe due to the mis .. read more
Author(s)
Fengying Zhou, Fen Chen, and Ning-Cheng Lee
Event
IPC APEX EXPO 2019

Size Matters - The Effects of Solder Powder Size on Solder Paste Performance

Solder powder size is a popular topic in the electronics industry due to the continuing trend of miniaturization of electronics. The question commonly asked is “when we should switch from Ty .. read more
Author(s)
Tony Lentz
Event
IPC APEX EXPO 2014

Interconnect Reliability Correlation with System Design and Transportation Stress

Interconnect reliability especially in BGA solder joints and compliant pins are subjected to design parameters which are very critical to ensure product performance at pre-defined shipping c .. read more
Author(s)
Dr. Paul Wang, Vincent Weng, and Dr. Kim S ang C him
Event
IPC APEX EXPO 2019

Multiphysics Design for Thermal Management to Increase Radar Capabilities

Increased demand for radar capabilities has required increasingly more efficient thermal management techniques. Simple cold plates using tubes or channels are frequently used to cool high po .. read more
Author(s)
Paul W Bratt
Event
IPC APEX EXPO 2019

Realization of a New Concept for Power Chip Embedding

Embedded components technology has launched its implementation in volume products demanding high levels of miniaturization. Small modules with embedded dies and passive components on the top .. read more
Author(s)
H. Stahr, M. Morianz, I. Salkovic
Event
IPC APEX EXPO 2019

Stretchable Hybrid Electronics (S.H.E.) Constructions Based on a Novel Thermosetting Polymer System

This presentation covers Stretchable hybrid electronics.  Stretchable electronics have the most industry uses in wearable technology and for mobile sensing and response devices.  T .. read more
Author(s)
Andy Behr
Event
IPC APEX EXPO 2019

Next-Generation Additive Electronics -Precise Multi-Material Deposition for Circuits, Electro-Mechanical Parts and Antennas

This presentation covers additive manufacturing and the direct deposit of multiple metals.  This additive capability is best utilized for the production of complicated circuits such as .. read more
Author(s)
Simon Fried
Event
IPC APEX EXPO 2019

Additive Manufacturing of a Heat Exchanger for a Radar System

The defense industry has realized the importance of Additive Manufacturing (AM) and how this technology can be utilized where parts can be fabricated inexpensively with reduction in lead tim .. read more
Author(s)
Patrick Loney, Roddy Rodriguez, Phil Lovell, Bruce Isler, Brian Miller
Event
IPC APEX EXPO 2019