Open AccessHybrid Soldering 2.3D Assembly With High Reliability and Low Cost
Author(s) -
Han-Wen Hu,
Yu-Wei Huang,
Yi-Chieh Tsai,
Meng-Kai Shih,
Kuan-Neng Chen
Publication year - 2022
Publication title -
ieee journal of the electron devices society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.69
H-Index - 31
ISSN - 2168-6734
DOI - 10.1109/jeds.2022.3205951
Subject(s) - components, circuits, devices and systems , engineered materials, dielectrics and plasmas
In this study, an advanced 2.3D solution was proposed to integrate RDL interposer and FR-4 substrate using the technique of hybrid soldering, which applies printing of epoxy solder paste to form the hybrid joint. The simulation was performed to evaluate warpage and von Mises stress of different joint structures, indicating that the hybrid joint structure is promising for the reliability of 2.3D assembly. In addition, hybrid soldering 2.3D assembly was successfully demonstrated, followed by SEM analyses, electrical measurements, warpage measurements, and thermal cycling tests for 5000 cycles. The experimental results validate that the packaging can achieve high reliability without the needs of underfill. Thus, this solution paves the way for large area 2.3D integration with low cost, high throughput, and high reliability.