A Study on the Reliability Evaluation of a 3D Packaging Storage Module under Temperature Cycling Ultimate Stress
Shuai Zhou1,2, Kaixue Ma1, Yugong Wu1
1School of Microelectronics, Tianjin University, Tianjin 300072, China.
Micromachines
|April 27, 2024
Summary
3D packaging storage modules can fail due to thermal fatigue from rapid temperature changes. Cracks from plastic and creep strains, exacerbated by CTE differences, are key failure factors, confirmed by simulations within 10% accuracy.
Area of Science:
- Materials Science
- Mechanical Engineering
- Reliability Engineering
Background:
- Reliability enhancement testing technology is crucial for advanced electronic packaging.
- Understanding stress-strain properties of 3D packaging storage modules is vital for device longevity.
Purpose of the Study:
- To analyze the stress-strain properties of 3D packaging storage modules.
- To evaluate operating and destruction limits during temperature cycling tests.
- To identify weak points and failure mechanisms impacting reliability.
Main Methods:
- Utilized a variety of testing combinations and finite element simulations.
- Conducted temperature cycling tests ranging from -65 °C to +150 °C.
- Analyzed stress-strain behavior and failure modes.
Main Results:
- 3D packaging storage devices are susceptible to thermal fatigue failure under abrupt temperature changes.
- Accumulation of plastic and creep strains leads to crack formation, a primary failure mechanism.
- Coefficient of Thermal Expansion (CTE) differences between epoxy resin and solder joints accelerate crack formation.
Conclusions:
- Finite element simulations closely matched experimental testing results, with a deviation within 10%.
- Thermal fatigue is a significant failure mode for 3D packaging storage modules under cyclic temperature stress.
- Identifying and mitigating CTE mismatch effects is critical for enhancing the reliability of 3D packaging.
Related Concept Videos
01:26Residual Stresses
218
Residual stresses reside in a structure even after removing the original stress inducer. This phenomenon often arises from varied plastic deformations across different parts of a structure. Consider a rod stretched beyond its yield point. It will not regain its original length due to permanent deformation. Even after load removal, the rod does not entirely lose stress because of uneven plastic deformations, resulting in residual stresses. The computation of these stresses in structures is...
218
01:21Fatigue
181
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
181
01:25Yield Criteria for Ductile Materials under Plane Stress
160
In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
The Maximum Shearing Stress Criterion, also known as...
The Maximum Shearing Stress Criterion, also known as...
160
01:12Temperature Dependent Deformation
147
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
147
01:15Stress: General Loading Conditions
307
To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
307
01:21Plastic Behavior
196
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
196