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.
Solder Joint Reliability Qualification of Various Component Mounting Modification Configurations Using Thermal Cycle Testing
The selection and use of solder joint modification configurations for printed wiring assemblies has traditionally been a design
specific activity. The implementation and use of a standardized s
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Characterization of PCB Plated-Thru-Hole Reliability using Statistical Analysis
Various test methods are used to characterize the PCB plated-thru-hole reliability. One such method is the Interconnect Stress
Test (IST). The results from this test are often used to qualify P
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Lead Free and Other Process Effects on Conductive Anodic Filamentation Resistance of Glass Reinforced Epoxy Laminates
Conductive Anodic Filamentation is a subsurface failure mode for woven glass reinforced laminates (FR4) materials,where a
copper salt filament allows bridging between via walls or other copper
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Lead-Free Soldering: DOE Study to Understand its Affect on Electronic Assembly Defluxing
Lead-free alloys under consideration have physical properties,which may directly impact industry standard electronic assembly
cleaning processes. The purpose of this study is to evaluate how th
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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
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Lead Free Assembly of Chip Scale Packages
Chip scale packages (CSPs) are widely used in portable electronic products where there is also a growing trend to lead free
assembly. Many CSP designs will meet the thermal cycle or thermal sho
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Reliability Assessment of CSP Underfill Methods
The miniaturization trend in electronics has proliferated the use of Chip Scale Packages (CSPs) in electronics assembly. CSPs
used in portable devices are subjected to harsh mechanical and ther
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Mechanical Bending Technique for Determining CSP Design and Assembly Weaknesses
A cyclic board-bending technique has been developed to ensure a reproducible multiaxial stress state at the Chip
Size Package (CSP) solder fillet. Mechanically stressing the package serves as a
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Non-Telecom Optoelectronics
When we think of optoelectronics in the USA,we automatically think of telecom applications. These fueled huge growth at
the turn of the millennium,and even after the bubble burst in 2001-2,tele
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Is That Splice Really Good Enough? Improving Fiber Optic Splice Loss Measurement
Results from a National Electronics Manufacturing Initiative (NEMI) project,formed to improve aspects of fiber optic fusion
splicing,are reported. The focus of this paper is ultra low loss spli
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Creating a New Optoelectronics Standard: Specifications for Process Carriers Used to Handle Optical Fibers in Manufacturing
The lack of consistency and compatibility in process carrier designs was cited as an early barrier to automation in the
nascent fiber-optics industry. Under the auspices of the National Electro
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NEMI Cost Analysis: Optical Versus Copper Backplanes
The outlook for optical PCBs is unclear for mainly three reasons: 1) today's limits for copper boards can be stretched with
design and manufacturing improvements,2) the market demand for next g
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Drawing Note Generator
This paper will describe the method used to automate drawing note creation at Lockheed Martin. It will discuss the reasons
for the automation and some of the decisions that needed to be made be
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Via in Pad Study Evaluating the Impact on Circuit Design,Board Layout,Manufacturing,Emissions Compliance and Product Reliability
Driving factors for the use of via in pad technology include the growing trend towards more dense and complex printed
circuit board designs as well as the need to minimize parasitic capacitance
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Reliability of High Density,High Layer Count,Multilayer Backplanes
This paper discusses the work and testing performed to obtain extreme high reliability performance from high layer count,
large panel format multilayer printed wiring boards that are used for b
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Designing Embedded Resistors and Capacitors
Embedded passives,i.e.,resistors and capacitors built right into the printed circuit board substrate,is a rapidly emerging and
pivotal technology for the PCB industry preceded only by the plate
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Design Considerations for Thin-Film Embedded Resistor and Capacitor Technologies
Embedded passives technologies can provide benefits of size,performance,cost,and reliability to high density,highspeed
designs. A number of embedded passive technology solutions are available t
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Embedded Passives in High Layer Count High Reliability Printed Wiring Boards
This paper will discuss the use of thin film buried resistors and thin core plane pairs in high layer count high reliability
printed wiring boards used in single and double sided surface mount
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“Built-In-Trace” Resistors
The newly developed Ohmega-Ply “Resistor-Built-in-Trace” technology uses low-ohmic resistive materials for embedded
resistors congruent to the circuitry in a multilayer PCB or HDI substrate. Hi
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Performance of Polymeric Ultra-thin Substrates for Use as Embedded Capacitors: Comparison of Unfilled and Filled Systems with Ferroelectric Particles
We have previously published our work on developing thin substrates for use as embedded capacitor layers. Based on this
work we have continued to characterize the performance and reliability of
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Decoupling with Anodized Ta
Novel configurations of decoupling capacitors were formed by anodizing Ta,resulting in Ta2O5 films 2000 Å thick and k =
23,giving about 110 nF/cm2. Since the dielectric is very thin,the parasit
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New Developments in Polymer Thick Film Resistor Technology
Motorola has been using embedded polymer thick film resistors on immersion silver-plated copper terminations in products
for four years,and in the past year other firms have begun using this te
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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
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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
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Lead Free Process Transition Solder Paste Characteristic Assessment
The migration to Lead Free raw materials in the Electronics Industry will happen faster than the date proposed in the original
draft of the legislation. A true Pb-free solution for product such
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