A vehicle upper body structure includes an inner member and an outer member assembled together to form a roof side rail, a pillar and a roof cross rail joined together at a junction. The register cell includes a base cell and a plurality of history cells, each of which is coupled to the base cell. The data stream may include audio content, video content or both. The contact area between the second under ball metallurgy and the second bump pad is larger than that between the first under ball metallurgy and the first bump pad. The aforementioned pumping device is positioned in the recess of the receiver.