429 thermal cycle results

Reliability of Reworked Lead-free Assemblies - EPTAC - Train. Work Smarter. Succeed

| https://www.eptac.com/ask/reliability-of-reworked-lead-free-assemblies/

. How many more rework cycles can we do before compromising the reliablity of the assemblies?” In the past we used to recommend 5 thermal cycles and a removal and replacement was consider one cycle

 Measles will not propagate with exposure to thermal cycle 17 Example of Measles 18 Crazing: Definition and Cause  It is a separation along the fiber bundles

| https://www.eptac.com/wp-content/uploads/2021/11/webinar_eptac_11_19_08.pdf

:30 PM The Effect of PCB Thickness on Thermal Cycle Reliability Bev Christian, Ph.D., Independent Consultant 4:00 PM Final Finishes for High Frequency Applications George Milad, Uyemura 5:00 PM Facility Tour

40731 | https://www.smta.org/icehet/ICEHET-2020-Program.pdf

Surface Mount Technology Association (SMTA)

40731

Phase Formation and Solid Solubility in High Reliability Pb-Free Solders Containing Bi, Sb or In

Surface Mount Technology Association (SMTA) | https://www.smta.org/knowledge/proceedings_abstract.cfm?PROC_ID=5454

:  Sn-Ag-Cu (SAC) solders generally have better thermal cycling performance than eutectic Sn-Pb. However, their performance deteriorates significantly as the harshness of the thermal cycle increases, and the high-Ag SAC solders that perform best in thermal cycling have relatively poor drop impact properties

Surface Mount Technology Association (SMTA)

SON / QFN Calculations - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/topic889&OB=DESC.html

. recommended thermal pad size using the "Footprint Tab".   The mfr. does testing for thermal cycle, shock and vibration on their recommended patterns and I've come to trust them, as I've never had a problem yet when I follow their recommendations

PCB Libraries, Inc.

SON / QFN Calculations - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/son-qfn-calculations_topic889_post3258.html

. recommended thermal pad size using the "Footprint Tab".   The mfr. does testing for thermal cycle, shock and vibration on their recommended patterns and I've come to trust them, as I've never had a problem yet when I follow their recommendations

PCB Libraries, Inc.

SON / QFN Calculations - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic889&OB=ASC.html

. recommended thermal pad size using the "Footprint Tab".   The mfr. does testing for thermal cycle, shock and vibration on their recommended patterns and I've come to trust them, as I've never had a problem yet when I follow their recommendations

PCB Libraries, Inc.

Low Void Curing - Heller

Heller Industries Inc. | https://hellerindustries.com/low-void-curing/

. Convection heaters and heat exchangers maintain a recipe-defined thermal profile during the entire curing cycle. A typical PCO temperature and Pressure profile

Heller Industries Inc.

Footprints for High Vibration and Shock - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/footprints-for-high-vibration-and-shock_topic2568_post10485.html

.  Also, I have never known IPC to run their own PCB fabrication and assembly for the purpose of evaluation of solder joints, stress and thermal cycle testing

PCB Libraries, Inc.

Footprints for High Vibration and Shock - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/footprints-for-high-vibration-and-shock_topic2568_post10481.html

.  Also, I have never known IPC to run their own PCB fabrication and assembly for the purpose of evaluation of solder joints, stress and thermal cycle testing

PCB Libraries, Inc.