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Journal Articles

Mechanical Properties of Doped Solder SAC-Q for High Strain Rate Testing at Extreme Surrounding Temperatures for 6 Months of Isothermal Aging

Pradeep Lall, Vishal Mehta, Jeff Suhling, Ken Blecker
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Research-Article
J. Electron. Packag. September 2024, 146(3): 031006.
Paper No: EP-22-1025
https://doi.org/10.1115/1.4064521
Published Online: March 11, 2024
View Article titled, Mechanical Properties of Doped Solder SAC-Q for High Strain Rate Testing at Extreme Surrounding Temperatures for 6 Months of Isothermal Aging
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Topics: Elastic moduli, Mechanical properties, Solders, Stress, Stress-strain curves, Temperature, Tensile strength, Testing, Viscoplasticity, Finite element analysis
Journal Articles

Epoxy-Printed Circuit Board Interfacial Fracture Reliability Under Three-Point and Four-Point Bend Loading After Sustained Elevated Temperature Exposure

Pradeep Lall, Aathi Raja Ram Pandurangan, Ken Blecker
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Technical Briefs
J. Electron. Packag. September 2024, 146(3): 034502.
Paper No: EP-22-1028
https://doi.org/10.1115/1.4064604
Published Online: March 7, 2024
View Article titled, Epoxy-Printed Circuit Board Interfacial Fracture Reliability Under Three-Point and Four-Point Bend Loading After Sustained Elevated Temperature Exposure
Open the PDF for Epoxy-Printed Circuit Board Interfacial Fracture Reliability Under Three-Point and Four-Point Bend Loading After Sustained Elevated Temperature Exposure in another window
Topics: Epoxy adhesives, Epoxy resins, Fracture (Materials), Fracture toughness, Stress, Delamination, Temperature, Reliability, Printed circuit boards
Proceedings Papers

Predictive Modeling of High-G Potted Assemblies With Fine Pitch Electronics After Sustained High-Temperature Exposure

Pradeep Lall, Aathi Raja Ram Pandurangan, Ken Blecker
Proc. ASME. InterPACK2023, ASME 2023 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T08A005, October 24–26, 2023
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2023-111950
https://doi.org/10.1115/IPACK2023-111950
View Paper titled, Predictive Modeling of High-G Potted Assemblies With Fine Pitch Electronics After Sustained High-Temperature Exposure
Open the PDF for Predictive Modeling of High-G Potted Assemblies With Fine Pitch Electronics After Sustained High-Temperature Exposure in another window
Topics: Delamination, Electronics, High temperature, Modeling, Shock (Mechanics)
Proceedings Papers

High-G Level Shock Damage-Accrual in Doped/Undoped SnAgCu Solders Under 100°C Sustained Operation Up to 1-Year

Pradeep Lall, Vishal Mehta, Jeff Suhling, Ken Blecker
Proc. ASME. InterPACK2023, ASME 2023 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T08A008, October 24–26, 2023
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2023-111981
https://doi.org/10.1115/IPACK2023-111981
View Paper titled, High-G Level Shock Damage-Accrual in Doped/Undoped SnAgCu Solders Under 100°C Sustained Operation Up to 1-Year
Open the PDF for High-G Level Shock Damage-Accrual in Doped/Undoped SnAgCu Solders Under 100°C Sustained Operation Up to 1-Year in another window
Topics: Damage, Shock (Mechanics), Solders, Temperature, Viscoplasticity
Proceedings Papers

High Strain Rate Properties and Evolution of Plastic-Work for Doped Solder SAC-Q for Isothermal Aging Up to 240-Days at 100°C

Pradeep Lall, Vishal Mehta, Jeff Suhling, Ken Blecker
Proc. ASME. InterPACK2022, ASME 2022 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T10A010, October 25–27, 2022
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2022-97438
https://doi.org/10.1115/IPACK2022-97438
View Paper titled, High Strain Rate Properties and Evolution of Plastic-Work for Doped Solder SAC-Q for Isothermal Aging Up to 240-Days at 100°C
Open the PDF for High Strain Rate Properties and Evolution of Plastic-Work for Doped Solder SAC-Q for Isothermal Aging Up to 240-Days at 100°C in another window
Topics: Shock (Mechanics), Solders, Temperature, Operating temperature, Alloys, High temperature, Stress, Stress-strain curves, Testing, Aerospace industry
Proceedings Papers

Predictive Cohesive Zone Modeling for Delamination at PCB-Potting Material Interfaces Under Four-Point Bend Loading With Sustained High-Temperature Exposure

Pradeep Lall, Aathi Raja Ram Pandurangan, Ken Blecker
Proc. ASME. InterPACK2022, ASME 2022 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T10A008, October 25–27, 2022
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2022-97427
https://doi.org/10.1115/IPACK2022-97427
View Paper titled, Predictive Cohesive Zone Modeling for Delamination at PCB-Potting Material Interfaces Under Four-Point Bend Loading With Sustained High-Temperature Exposure
Open the PDF for Predictive Cohesive Zone Modeling for Delamination at PCB-Potting Material Interfaces Under Four-Point Bend Loading With Sustained High-Temperature Exposure in another window
Topics: Delamination, Epoxy adhesives, Epoxy resins, High temperature, Modeling
Proceedings Papers

Effect of Aging on High Strain Rate Mechanical Properties of SAC+Bi Solders After Exposure to Isothermal Aging of 50°C Up To 120 Days

Pradeep Lall, Mrinmoy Saha, Jeff Suhling, Ken Blecker
Proc. ASME. InterPACK2022, ASME 2022 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T10A013, October 25–27, 2022
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2022-97449
https://doi.org/10.1115/IPACK2022-97449
View Paper titled, Effect of Aging on High Strain Rate Mechanical Properties of SAC+Bi Solders After Exposure to Isothermal Aging of 50°C Up To 120 Days
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Topics: Mechanical properties, Solders, Temperature, Alloys, Storage, Aerospace industry, Automotive industry, Constitutive equations, Finite element analysis, Low temperature materials
Proceedings Papers

Study of Interface Monotonic and Fatigue Fracture Measurements at the Substrate Potting Compound Interfaces Under Flexure Loading

Pradeep Lall, Padmanava Choudhury, Ken Blecker
Proc. ASME. InterPACK2022, ASME 2022 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T10A012, October 25–27, 2022
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2022-97448
https://doi.org/10.1115/IPACK2022-97448
View Paper titled, Study of Interface Monotonic and Fatigue Fracture Measurements at the Substrate Potting Compound Interfaces Under Flexure Loading
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Topics: Bending (Stress), Cycles, Failure, Fatigue, Fracture (Materials), Fracture (Process), Stress
Journal Articles

Remaining Useful Life Estimation and Prognostication of SAC305 Printed Circuit Boards for Dynamic Conditions of Temperature and Vibration Loads

Pradeep Lall, Tony Thomas, Ken Blecker
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Research-Article
J. Electron. Packag. June 2022, 144(2): 021111.
Paper No: EP-21-1067
https://doi.org/10.1115/1.4052630
Published Online: December 1, 2021
View Article titled, Remaining Useful Life Estimation and Prognostication of SAC305 Printed Circuit Boards for Dynamic Conditions of Temperature and Vibration Loads
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Topics: Failure, Service life (Equipment), Signals, Temperature, Vibration, Principal component analysis
Proceedings Papers

Prognostics and RUL Estimations of SAC305, SAC105 and SnAg Solders Under Temperature and Vibration Using Long Short-Term Memory (LSTM) Deep Learning

Pradeep Lall, Tony Thomas, Ken Blecker
Proc. ASME. InterPACK2021, ASME 2021 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T07A019, October 26–28, 2021
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2021-74066
https://doi.org/10.1115/IPACK2021-74066
View Paper titled, Prognostics and RUL Estimations of SAC305, SAC105 and SnAg Solders Under Temperature and Vibration Using Long Short-Term Memory (LSTM) Deep Learning
Open the PDF for Prognostics and RUL Estimations of SAC305, SAC105 and SnAg Solders Under Temperature and Vibration Using Long Short-Term Memory (LSTM) Deep Learning in another window
Topics: Solders, Temperature, Vibration, Failure, Signals, Service life (Equipment), Time series, Complex systems, Dimensions, Maintenance
Proceedings Papers

Determination of High and Low Temperature High Strain Rate Mechanical Properties for SAC-R After Exposure to Isothermal Aging of 50°C Up To 8 Months

Pradeep Lall, Mrinmoy Saha, Jeff Suhling, Ken Blecker
Proc. ASME. InterPACK2021, ASME 2021 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T07A022, October 26–28, 2021
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2021-74069
https://doi.org/10.1115/IPACK2021-74069
View Paper titled, Determination of High and Low Temperature High Strain Rate Mechanical Properties for SAC-R After Exposure to Isothermal Aging of 50°C Up To 8 Months
Open the PDF for Determination of High and Low Temperature High Strain Rate Mechanical Properties for SAC-R After Exposure to Isothermal Aging of 50°C Up To 8 Months in another window
Topics: Low temperature, Mechanical properties, Storage, Temperature, Alloys, Solders, Avionics, Climate, Design, Electronic packages
Proceedings Papers

Evolution of Potting-PCB Interfacial Reliability After Long Term High Temperature Operation

Pradeep Lall, Aathi Raja Ram Pandurangan, Ken Blecker
Proc. ASME. InterPACK2021, ASME 2021 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T07A018, October 26–28, 2021
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2021-74062
https://doi.org/10.1115/IPACK2021-74062
View Paper titled, Evolution of Potting-PCB Interfacial Reliability After Long Term High Temperature Operation
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Topics: Delamination, Epoxy adhesives, Epoxy resins, Fracture toughness, High temperature, Reliability, Shock (Mechanics), Stress, Fracture (Materials), Electronic components
Proceedings Papers

Mechanical Properties of Doped Solder SAC-Q for High Strain Rate Testing at Extreme Surrounding Temperatures for 6 Months of Isothermal Aging

Pradeep Lall, Vishal Mehta, Jeff Suhling, Ken Blecker
Proc. ASME. InterPACK2021, ASME 2021 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T07A020, October 26–28, 2021
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2021-74067
https://doi.org/10.1115/IPACK2021-74067
View Paper titled, Mechanical Properties of Doped Solder SAC-Q for High Strain Rate Testing at Extreme Surrounding Temperatures for 6 Months of Isothermal Aging
Open the PDF for Mechanical Properties of Doped Solder SAC-Q for High Strain Rate Testing at Extreme Surrounding Temperatures for 6 Months of Isothermal Aging in another window
Topics: Alloys, High temperature, Mechanical properties, Shock (Mechanics), Solders, Temperature, Testing, Vibration, Viscoplasticity
Journal Articles

High Strain Rate Mechanical Properties of SAC-Q Solder for Extreme Temperatures After Exposure to Isothermal Aging Up to 90 Days

Pradeep Lall, Vishal Mehta, Jeff Suhling, Ken Blecker
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Research-Article
J. Electron. Packag. June 2022, 144(2): 021108.
Paper No: EP-21-1060
https://doi.org/10.1115/1.4052073
Published Online: October 6, 2021
View Article titled, High Strain Rate Mechanical Properties of SAC-Q Solder for Extreme Temperatures After Exposure to Isothermal Aging Up to 90 Days
Open the PDF for High Strain Rate Mechanical Properties of SAC-Q Solder for Extreme Temperatures After Exposure to Isothermal Aging Up to 90 Days in another window
Topics: Elastic moduli, Mechanical properties, Solders, Stress, Stress-strain curves, Temperature, Tensile strength, Testing, Operating temperature, High temperature
Proceedings Papers

High Strain Rate Low Temperature Properties for SAC-R After Exposure to Isothermal Aging

Pradeep Lall, Mrinmoy Saha, Jeff Suhling, Ken Blecker
Proc. ASME. InterPACK2020, ASME 2020 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T01A010, October 27–29, 2020
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2020-2659
https://doi.org/10.1115/IPACK2020-2659
View Paper titled, High Strain Rate Low Temperature Properties for SAC-R After Exposure to Isothermal Aging
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Topics: Alloys, Avionics, Climate, Design, Electronic packages, Electronic packaging, High temperature, Lead-free solders, Low temperature, Low temperature materials
Proceedings Papers

High Strain Rate Mechanical Properties of SAC-Q Between -65°C and +200°C After Exposure to Isothermal Aging

Pradeep Lall, Vishal Mehta, Jeff Suhling, Ken Blecker
Proc. ASME. InterPACK2020, ASME 2020 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T01A011, October 27–29, 2020
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2020-2660
https://doi.org/10.1115/IPACK2020-2660
View Paper titled, High Strain Rate Mechanical Properties of SAC-Q Between -65°C and +200°C After Exposure to Isothermal Aging
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Topics: High temperature, Mechanical properties, Testing, Alloys, Operating temperature, Solders, Stress, Aerospace industry, Biomedicine, Electronic components
Proceedings Papers

Feature Vector Identification and Prognostics of SAC305 PCB’s for Varying Conditions of Temperature and Vibration Loads

Pradeep Lall, Tony Thomas, Ken Blecker
Proc. ASME. InterPACK2020, ASME 2020 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T08A011, October 27–29, 2020
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2020-2679
https://doi.org/10.1115/IPACK2020-2679
View Paper titled, Feature Vector Identification and Prognostics of SAC305 PCB’s for Varying Conditions of Temperature and Vibration Loads
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Topics: Alloys, Stress, Temperature, Vibration
Proceedings Papers

Health Monitoring of PCB’s Under Mechanical Shock Loads

Pradeep Lall, Tony Thomas, Jeff Suhling, Ken Blecker
Proc. ASME. InterPACK2019, ASME 2019 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, V001T06A028, October 7–9, 2019
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2019-6578
https://doi.org/10.1115/IPACK2019-6578
View Paper titled, Health Monitoring of PCB’s Under Mechanical Shock Loads
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Topics: Shock (Mechanics), Stress, Signals, Failure, Damping, Statistical analysis, Strain gages, Strain measurement