168 results about "Signal transmission delay" patented technology

The present invention provides a semiconductor device that is inexpensive and can suppress signal transmission delay, and a manufacturing method thereof. The semiconductor device includes: a plurality of semiconductor chips; a semiconductor substrate that has, on the same surface thereof, a chip-to-chip interconnection for electrically connecting the plurality of semiconductor chips to each other, and a plurality of chip-connection pads connected to the chip-to-chip interconnection; and a wiring board that has a plurality of lands of which pitch is larger than a pitch of the chip-connection pads, wherein a major surface of each of the plurality of semiconductor chips is connected to the chip-connection pads via a first connector so that the plurality of semiconductor chips are mounted on the semiconductor substrate, and an external-connection pad is formed on the major surface other than a region facing the semiconductor substrate, and is connected to the land on the wiring board via a second connector.

The invention relates to a video conference realizing method and a video conference realizing system. The method comprises the following steps that all broadband mobile hotspot equipment participating in a conference sends local panoramic video images and sound signals to a multipoint conferencing server; the multipoint conferencing server sends the received panoramic video images and the sound signals to other broadband mobile hotspot equipment participating in the conference except sending parts; and after all broadband mobile hotspot equipment participating in the conference receives the panoramic video images and the sound signals of other broadband mobile hotspot equipment participating in the conference, the local panoramic video images and the received panoramic video images are assembled into conference panoramic video images, and the conference panoramic video images and the received sound signals are synchronized and are then sent to mobile terminals participating in the conference under the broadband mobile hotspot equipment. The method and the system have the advantages that the flexible mobility and the 3G (3rd Generation) and Wi-Fi features of the broadband mobile hotspot equipment are utilized, the problem of multimedia signal transmission delay is solved, and in addition, the limitation that conference places need to be concentrated is solved.

A difference in delay of signal transmission due to the wiring within a board is minimized. A wiring board includes wiring for connecting terminals included in one of a plurality of semiconductor chips to terminals included in another one of the plurality of semiconductor chips, through branch points. Each of the plurality of semiconductor chips includes first and second terminals. Moreover, a first wiring up to the first terminals and a second wiring up to the second terminals are in a positional relationship of being shifted parallel to each other in a planar direction of the wiring board so as not to come into electrical contact with each other. In each of the first and second wirings, a wire is provided between a connection point for the terminal in a first one of the semiconductor chips and a position of a root, a complete binary tree structure in which all leaves are at the same depth from the root is formed, connection points for the terminals in the rest of the semiconductor chips are positioned at the respective leaves, and the paths of wires respectively corresponding to branches at the same depth in the tree structure include vias and the lengths of the paths of wires including the lengths of the vias are equal to each other.