IMAPS Chesapeake Chapter

The International Microelectronics and Packaging Society’s roots stretch over forty years with the formation of the International Society for Hybrid Microelectronics (ISHM) in 1967.  In 1997 ISHM merged with the International Electronic Packaging Society (IEPS) to form IMAPS and has since become the largest society dedicated to the advancement of microelectronics and electronic packaging.

The IMAPS student chapter at the University of Maryland is composed of several graduate students whose focus is in the field of microelectronics and electronics packaging.  Many members are involved in microelectronics reliability through their graduate research at the Center for Advanced Life Cycle Engineering (CALCE).

 

University of Maryland and IMAPS

The University of Maryland has one of the world's largest research center focusing on electronics reliability. This center, the Center for Advanced Life Cycle Engineering, was established in 1986. Since then, CALCE has grown to be recognized as one of international leaders in reliability of electronics based on Physics-of-Failure analysis. The wide scope of CALCE's research on reliability of electronics products and systems spans prognostics and health management of electronics, cost modeling, MEMS reliability and more. CALCE is led by founder and director, IMAPS Fellow and George Dieter Professor of Mechanical Engineering, Michael Pecht. Professor Pecht is a world renowned reliability engineer and educator with numerous awards.

The IMAPS student chapter at University of Maryland, College Park was started in 2000. It comprised of graduate students and research staff from CALCE. The student chapter was originally headed and advised by Dr. Patrick McCluskey . However, the chapter eventually became dormant towards the latter half of the 2000s. It was later revived in 2011, and today consists of more than 20 graduate students and research faculty from CALCE. The chapter is currently led by Dr. Diganta DasDr. Michael Osterman, the director of the CALCE Electronics Products and Systems Center is also actively involved with the chapter and its activities.

The first general body meeting of IMAPS student chapter was held on March 18, 2011. Since then, the University of Maryland IMAPS student chapter has held and participated in several events. The chapter organizes a poster presentation competition every semester. The events provide the members opportunities to interact with other members of the Chesapeake chapter and various industry experts.

Faculty Advisor: Dr. Diganta Das

President: Edmond Elburn
Vice President: Subramani Manoharan
Treasurer: Saurabh Saxena
Secretary: LingXi Kong

IMAPS Members

  • Weiping Diao
  • Edmond Elburn
  • Masuma Khatoon Ema
  • Simon Fritz
  • Eric Gutierrez
  • Lovelesh Kaushik
  • Mehdi Kohani
  • Lingxi Kong
  • Nga Man Jennifa Li
  • Subramani Manoharan
  • Nripendra Patel
  • Jose Romero Perdomo
  • Yonatan Saadon
  • Saurabh Saxena
  • Chaobo Shen
  • Yi Wu
  • Zhaoxi Yao
  • He Yun

 

The IMAPS Chesapeake Chapter held its annual Spring Technical Symposium on April 18th, 2018, at the University of Maryland, College Park. The event was held in association with the Center for Advanced Life Cycle Engineering (CALCE). The symposium included a poster and 3 Minute Thesis competition for all graduate and undergraduate students and a peek inside the research and testing that goes on within CALCE.

The evening began with the 3 Minute Thesis Competition during which time the participants briefly presented their research work and were evaluated by all members of the audience. The judged criteria included presenter performance, enthusiasm, thesis topic, creativity, presentation skills, and depth of knowledge. CALCE student Jose Romero won the competition and the $50 award.

The student poster competition followed. Of the submissions received, eleven finalists were chosen to present at the event. A summary of each of the poster topics and presenters is provided below.

Presenter Topic University / Organization
Nripendra Patel Reliability Assessment of Strontium based Perovskite Electrodes of Solid Oxide Fuel Cells University of Maryland
Yi Wu Analysis of Manufacturing-Induced Defects in Lithium-Ion Batteries Using Computed Tomography   Nanjing University of Aeronautics and Astronautics
Lingxi Kong Interaction of Lithium Dendrite Growth with Separator University of Maryland
Weiping Diao Electrical Current Distribution in Lithium-ion Battery Packs with Parallel Connections University of Maryland
Mehdi Kohani Analyzing the Characteristics of Electrostatic Discharge Events in Wearable Medical Devices University of Maryland
Subramani Manoharan Bond Pad Effects on Shear Strength of Copper Wire Bonds University of Maryland
Chaobo Shen Reliability Assessment for 1200V/450A Dual Channel IGBT Module under Power Cycling and Thermal Cycling University of Maryland
Saurabh Saxena Accelerated Testing and Modeling of High Energy LiCoO2 cathode-based Lithium-ion Batteries University of Maryland
Lovlesh Kaushik Selection of Lubricants for Electronic Connectors Based on Contact Resistance Behavior University of Maryland
Masuma Khatoon Ema Characterization of Thermal Runaway Behavior of Commercial Lithium ion Battery University of Maryland
Jose Romero Life Model for Tantalum Capacitors with Conductive Polymers University of Maryland

The judging for the competition was based on five topics: clarity of work, creativity of research, merit of research, presentation skills, and overall depth of knowledge. The winner of the event and the top prize of $200 was Subramani Manoharan, who presented on bond pad effects on shear strength of copper wire bonds. Saurabh Saxena was awarded second place for his presentation on accelerated life testing of lithium ion batteries and Mehdi Kohani received the third place prize for his work on electrostatic discharge events in wearable medical devices. 

The IMAPS Chesapeake Chapter held a Fall Technical Symposium on November 2nd, 2017, at the Applied Physics Laboratory (APL) of Johns Hopkins University. The symposium focused on the reliability issues and emerging trends in multilayer packages and simulation techniques. This symposium was also jointly organized by the IMAPS University of Maryland (UMD) student chapter. 

The evening began with a technical presentation by Bhanu Snood from the NASA Goddard Space Flight Center. Mr. Snood presented on recent work analyzing the degradation of the glass-fiber and epoxy interface in printed circuit boards. The second talk was by Rory Grondin from LPFK Laser & Electronics. Mr. Grondin presented on the use of direct laser etching as a processing technique. The final talk of the symposium was given by Dr. Will McKinzie of WEMTEC, inc. Dr. McKinzie presented on recent advances in low temperature cofired ceramic processing through the use of ultraviolet laser ablation. The proceedings for the day concluded with a dinner, giving the members of the chapter, speakers, and guests an opportunity to interact with each other. 
 

 

Speakers and Abstracts

Speaker: Bhanu Snood | Presentation Title: An Examination of Glass-Fiber and Epoxy Interface Degradation in Printed Circuit Boards 

Abstract: Multi-layer organic laminates, which make up over 90% of the present types of interconnecting substrates in today's electronics, can develop a loss of electrical insulation resistance between two conductors due to the conductive anodic filament phenomenon. The filament forms in two steps - a degradation at the polymer/glass fiber interface followed by an electrochemical reaction involving electro-deposition. Bond degradation between the glass and polymer matrix provides a path along which the electro-deposition may occur, the path may result from poor glass treatment, from mechanical stresses during PCB fabrication (such as drilling) and from the hydrolysis of the finish applied on glass fibers. The organosilane bonds between the polymer matrix and glass reinforcements can chemically degrade by hydrolysis or by thermal cycling, which induces stresses at the interface due to a coefficient of thermal expansion (CTE) mismatches. This talk will discuss these filament formation pathways, the key drivers towards degradation, experiments that help in characterizing and tracking the degradation of these interfaces. The experiments include application of nano-scale force/displacement measurements and the use of microscopic infrared spectroscopy to track the evolution of mechanically brittle networks around the glass fibers when the circuit board laminate is exposed to accelerated stress conditions. 

About the Speaker: Mr. Bhanu Sood is a Center Lead and Commodity Risk Assessment Engineer (CRAE) for Microelectronics Packaging and Circuit Boards at NASA Goddard Space Flight Center. Mr. Sood serves as NASA GSFC Specialist who manages overall Center development efforts pertaining to electronic circuit assemblies in Goddard Space Flight Center flight missions and ground equipment. Mr. Sood serves as an Agency authority on technical committees and advisory groups and manages the establishment and implementation of new research, technology development and technology demonstration initiatives relating to electronic circuit assemblies. Mr. Sood's areas of expertise include electronics supply chain risks, risk assessment and reliability analysis. 

Prior to joining NASA in 2015, Mr. Sood was the Director of Test Services and Failure Analysis Laboratory at University of Maryland's Center for Advanced Life Cycle Engineering (CALCE). In a 10+ year career at UMD, he managed reliability assessments and failure analysis of products from the aerospace, avionics, medical device, telecommunications, oil & gas and automotive industries. In his prior appointment at US Naval Research Laboratory (NRL), Mr. Sood worked on process development for 3D printing, printed micro-power sources, and patented a laser-assisted stereo-lithography based circuit fabrication technique. 

Mr. Sood has authored several book chapters, over thirty peer reviewed scholarly and technical papers and several hundred technical reports. Mr. Sood chairs the NASA Printed Circuit Board Working Group and three SAE Aerospace Standards Sub-Committees. He has participated in various conferences organizing committees and currently serves on the ASM Alloy Phase Diagram and ASM Emerging Technologies Awareness Committees. Mr. Sood holds one patent, and two invention disclosures, he is a senior member of IEEE and member of SAE and ASM. 


Speaker: Rory Grondin  | Presentation Title: Nanosecond and Picosecond Laser Processing for RF and EHF Applications 

Abstract: Direct laser etching is rapidly becoming the preferred method for advanced RF/microwave and millimeter wave research applications and production on demand processing. In this presentation, several laser models will be discussed showing the differences in capabilities at near-infrared, green and ultraviolet wavelengths on various materials including PTFE based microwave substrates, flex materials, fired ceramics such as Alumina, AlN, Piezo-ceramics (PZT), Titanate and Low Temperature Co-fired Ceramic (LTCC). Specific examples will also be provided demonstrating laser etched antenna and filter performance in comparison with traditional wet/chemical-etch, simulation software and mechanical milling. 

About the Speaker: Rory Grondin has worked with LPKF Laser & Electronics since 2006 advising engineers on the latest applications possible with a range of mechanical milling and advanced laser etching models. Research projects spanning multiple sectors including Government applications, medical research and communication networks have been processed expanding capabilities and enabling new product and design advances. He supports laser tool development for materials research using nano and picosecond laser processing. Rory has a BS degree from Oregon State University and has implemented new techniques for prototype development and production-on-demand processing now used by engineers in North America and around the globe. 



Speaker: Dr. Will McKinzie  | Presentation Title: Laser Ablation of Low Temperature Cofired Ceramic Packages for Millimeter Wave Antenna Applications 

Abstract: Low temperature cofired ceramic (LTCC) materials and conventional screen printing processes are a mature packaging technology for microwave frequency applications. In this presentation we discuss advances in LTCC processing which employ ultraviolet laser ablation to achieve smaller line widths and gaps than is possible with conventional screen printing, as small as 30 um with clean well-formed metal edges. This allows LTCC packaging to be used at higher frequencies including millimeterwave bands up to at least 100 GHz. Manufacturing test structures and two-port millimeter wave circuit test structures will be presented as examples of laser ablated LTCC test vehicles. The fine line and fine gap tolerances of about +/-8 um allow the precise fabrication of circuit transitions, antenna feed networks, matching networks, and electromagnetic bandgap (EBG) structures, all of which are essential for millimeterwave LTCC antennas. Examples of laser ablated LTCC antenna packages will be shown for 60 GHz and 77 GHz. Selected measurement results will be shown for antenna performance. 

About the Speaker: Dr. Will McKinzie has been designing millimeter wave packages in silicon and LTCC since 2007, wherein the packages include integrated antennas, vertical transitions, and electromagnetic bandgap (EBG) structures for suppression of surface waves and suppression of internal parasitic modes. He earned a BSEE from the University of MO at Rolla in 1982, and MSEE and PhD EE degrees from UCLA in 1989 and 1992 where he focused on computational electromagnetics for antenna design. He has worked for large companies including Motorola, Northrop Grumman, and Titan as well as startup companies including Etenna Corporation and Paratek Microwave. In 2003, Dr. McKinzie founded WEMTEC, Inc to develop unique EBG concepts for noise suppression in power distribution networks, and for parasitic mode suppression in microwave and millimeterwave packages. He is an inventor on many issued US patents. He currently does consulting work to develop microwave and millimeterwave antennas.
 

Jose Romero presents his poster at the spring symposium--Romero won this year's 3 Minute Thesis competition.

Subramani Manoharan won the spring symposium's 'Best Poster' award.

Li Ngaman presents on 'Shelf Life Evaluation of Electronic Components Using Physics-of-Failure Approach' at the summer symposium.


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