Irem Boybat-Kara
IEDM 2023
This study explored the fine pitch scalability of the die-to-die level vertical stacking through the Cu/SiO2 hybrid bonding technique for chips with varying Cu contact diameters (0.8-4 µm) and pitch spacings (2-10 µm). It also addresses challenges associated with the scalability of hybrid bonding including the precise alignment of the top/bottom Cu pads and the bonding results. In addition, we aim to understand the microstructural evolution and mechanical deformation of Cu pads during the hybrid bonding process. This involves microstructural characterization of the Cu films before and after the hybrid bonding via scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). In conclusion, this study offers some explanation on controlling mechanisms of the Cu-Cu bonding and highlights the desirable initial microstructural features and grain orientations of Cu pads to improve the Cu-Cu bonding quality for hybrid bonding
Irem Boybat-Kara
IEDM 2023
Laura Bégon-Lours, Mattia Halter, et al.
MRS Spring Meeting 2023
Ying Zhou, Gi-Joon Nam, et al.
DAC 2023
Alexander Janta-Polczynski, Elaine Cyr, et al.
ECTC 2024