Development of chip-on-flex bonding using Sn-based bumps and non-conductive adhesive
We focused on the development of low temperature and low cost processing. A reliable and low cost COF joints were formed using Sn-based bumps and NCA. The failure of COF joints did not occur even after reliability tests. The strong metallurgical bond maintains stable contact between bumps and pads. The metallurgical bond improved the reliability of the joints.
chip-on-flex sn-based bumps non-conductive adhesive