1. Reliability investigations on LIFT-printed isotropic conductive adhesive joints for system-in-foil applications
- Author
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Edsger C. P. Smits, Ashok Sridhar, Rajesh Mandamparambil, Sandeep Menon Perinchery, and Jeroen van den Brand
- Subjects
Materials science ,Integration testing ,02 engineering and technology ,law.invention ,020210 optoelectronics & photonics ,Flexural strength ,law ,0202 electrical engineering, electronic engineering, information engineering ,Electrical measurements ,Electronics ,Electrical and Electronic Engineering ,Composite material ,Safety, Risk, Reliability and Quality ,Electrical conductor ,FOIL method ,Stencil printing ,business.industry ,Electrical engineering ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Resistor ,0210 nano-technology ,business - Abstract
The reliability of a commercially available isotropic conductive adhesive (ICA) deposited via laser induced forward transfer (LIFT) printing is reported. ICAs are particularly important for surfacemount device (SMD) integration onto low-cost, large-area system-in-foil (SiF) applications such as radio frequency identification (RFID) transponder tags. For such tags, and for SiF in general, the reliability of the printed interconnects under harsh circumstances is critical. In this study, the reliability of surface mounted resistors bonded onto screen-printed conductive circuitry on polymer foil was assessed. The prepared samples were subjected to thermal shock testing (TST), accelerated humidity testing (AHT) and flexural testing, while electrical measurements were conducted at regular intervals. Die shear testingwas performed to evaluate the bond strength. The reliability characteristics of the LIFT-printed sampleswere benchmarked against current industry standard stencil printing process. Finally, the applicability of the LIFT–ICA process for practical applications is demonstrated using RFID transponder integration and testing.
- Published
- 2015