A Stress Singularity Parameter Approach for Evaluating the Interfacial Reliability of Plastic Encapsulated LSI Devices

Hattori, Toshio; Sakata, Shinji; Murakami, Gen

doi:10.1115/1.3226542

Cited by 99 publications

(26 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The works of Dunn et al (1997a, b) provide experimental correlation of A 1 (and possibly A 2 ) to fracture initiation in the case that α 1 and α 2 are real and the singular points are V-notches in isotropic materials. Hattori et al (1989Hattori et al ( , 1991 propose a two-parameter failure law based on A 1 and the exponent α 1 for V-notch configurations, and demonstrated that a good correlation is achieved with experimental results. Reedy and Guess (1995, and the references therein), correlated failures of adhesive-bonded butt tensile joints with A 1 .…”

Section: Introductionmentioning

confidence: 86%

Failure Criteria for Brittle Elastic Materials

Yosibash

2011

Interdisciplinary Applied Mathematics

View full text Add to dashboard Cite

Abstract. The validity of several known failure initiation criteria at reentrant corners in brittle elastic materials is examined and a simple one is proposed. Their predictions, under mode I stress field, are compared to experimental observations carried out on PMMA (polymer) and Alumina-7%Zirconia (ceramic) V-notched specimens. Because all realistic V-notched reentrant corners are blunt, a detailed experimental procedure has been followed, focusing on specimens with different notch tip radii. It is demonstrated that by assuming a sharp V-notch, some failure criteria predict reasonably well the experimental findings, and that corrections are needed in order for these to take into consideration the realistic radius at the notch tip.

show abstract

Section: Introductionmentioning

confidence: 86%

Failure Criteria for Brittle Elastic Materials

Yosibash

2011

Interdisciplinary Applied Mathematics

View full text Add to dashboard Cite

show abstract

“…Further, it may not be considered appropriate to represent an uncracked specimen by a cracked one. The use of a stress singularity parameter, equivalent to stress intensity factor in a cracked body, at the bi-material corner point was investigated by Groth and Brottare [18], Hattroi et al [19] and Lefebvre and Dillard [20]. However, the shortcomings of this stress singularity parameter are its dependence on the strength of the singularity and its variation with mode mixity.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Fatigue Damage in Adhesive Bonding: Part 2: Single Lap Joint

Wahab

Hilmy

Ashcroft

et al. 2010

Journal of Adhesion Science and Technology

View full text Add to dashboard Cite

Damage parameters for crack initiation in Single Lap Joint (SLJ) are determined by combining continuum damage mechanics, Finite Element Analysis (FEA) and fatigue experimental data. Even tough SLJ has a simple configuration; the stresses in the adhesive region are quite complex and exhibit a multi-axial state. Such a condition leads to the need to introduce a general value of triaxiality function in the damage evolution law rather than using a triaxiality function equals to unity as in the case of uniaxial stress state, e.g. bulk adhesive test specimen presented in part 1 of this paper. The effect of stress singularity due to the presence of corners at edges also contributes to the complex state of stress and the variability of triaxiality function along the adhesive layer in SLJ. The damage parameters A and β determined in Part 1 for bulk adhesive are now extended to take into account the multi-axial stress state in the adhesive layer as calculated from FEA.

show abstract

“…The delamination due to the stress concentration brings about fatal malfunction in the device. The linear elastic fracture mechanics (LEFM) concept is utilized for the evaluation of the interface strength at the edge (3), (4) . The size of a singular stress region near an interface edge is dependent on the film thickness (5), (6) .…”

Section: Introductionmentioning

confidence: 99%

Applicability of Fracture Mechanics on Brittle Delamination of Nanoscale Film Edge

Kitamura

Hirakata

Satake

2004

JSME Int. J., Ser. A

View full text Add to dashboard Cite

The stress concentration near the interface edge of a film/substrate, which dominates the delamination, is analyzed by molecular dynamics (MD) analysis. Here, the film thickness is on the nanoscale and the interatomic interaction is simulated by Morse-type model potentials. Three types of load are applied to the film/substrate to examine the effect of the stress-concentrated region on the delamination at the interface edge. At lower applied load, the stress distribution along the interface near the edge in the MD simulation coincides well with that obtained by linear elastic analysis (FEM: Finite Element Method). However, after the stress near the edge reaches the ideal strength of the interface, it deviates from the FEM result. The delamination crack is initiated from the free edge when the stress at y < 1 nm (y: distance from the edge) reaches the ideal interface strength. This signifies the criterion of interface toughness that the delamination is governed by the stress in the region (process zone). This also suggests the limit of applicability of linear elastic fracture mechanics on the nanoscale components.

show abstract

A Stress Singularity Parameter Approach for Evaluating the Interfacial Reliability of Plastic Encapsulated LSI Devices

Cited by 99 publications

References 3 publications

Failure Criteria for Brittle Elastic Materials

Failure Criteria for Brittle Elastic Materials

Evaluation of Fatigue Damage in Adhesive Bonding: Part 2: Single Lap Joint

Applicability of Fracture Mechanics on Brittle Delamination of Nanoscale Film Edge

Contact Info

Product

Resources

About