Interface and interconnection stresses in electronic assemblies – A critical review of analytical solutions
| Autor: | Ee Hua Wong, Johan Liu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Interconnection
Free edge Materials science business.industry 02 engineering and technology Structural engineering Mechanics Edge (geometry) 021001 nanoscience & nanotechnology Condensed Matter Physics Strength of materials Atomic and Molecular Physics and Optics Finite element method Surfaces Coatings and Films Electronic Optical and Magnetic Materials Stress (mechanics) 020303 mechanical engineering & transports 0203 mechanical engineering Shear stress Adhesive Electrical and Electronic Engineering 0210 nano-technology Safety Risk Reliability and Quality business |
| Zdroj: | Microelectronics Reliability. 79:206-220 |
| ISSN: | 0026-2714 |
| DOI: | 10.1016/j.microrel.2017.03.010 |
| Popis: | The closed-form solutions for the interfacial stresses in assemblies constituting of two relatively stiff adherends sandwiching a relatively compliant adhesive layer are reviewed. The closed-form solutions are categorised into the “non-free edge solutions” that do not satisfy the nil-shear stress condition at the free edge of the adhesive and the “free edge solutions” that do. Being strength of material solutions, the non-free edge solutions are significantly simpler in form. On the other hand, the solutions tend to grossly underestimate the magnitude of the peeling stress at the free edge. Almost all classical “non-free edge solutions” suffer from two setbacks: (i) assumed ?a = 0, thus severely underestimating the magnitude of the peeling stress; and (ii) neglected the thickness of the adhesive in their formulation of the x-compliance of assemblies and the evaluation of the effective bending strain on adherends; the former leads to overestimation while the latter leads to gross underestimation of the shear stress (and hence, ?a(l)). These are demonstrated in a numerical exercise in which two widely followed “non-free edge solutions” and a simplified “free edge solutions” are benchmarked against the finite element analysis. |
| Databáze: | OpenAIRE |
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