Abstract: A method and apparatus for organizing and displaying linked temporal or spatial data for rapid search and retrieval. In order to provide users the capability of moving forward and backward in time through linked documents in a research stream, the system of the invention accesses or stores information regarding reference documents that a main document cites. In most cases, the reference documents were main documents at the time they were written and thus, have their own reference documents. For this reason, the system of the present invention stores or accesses information regarding all documents as well as cited reference documents.

Abstract: A copper supporting sheet (5) has holes (9) for connecting semiconductor chips (3) to surface mount components (27). A laminate of polyimide (7) has holes (13) corresponding to the supporting layer holes (9) with copper 15 covering those holes (13). In addition to crossing those holes (13), the copper 15 forms conventional circuit patterns. The side having circuit patterns is populated by surface mount techniques with components (27). The opposite side has silicon chips (3) attached to the copper sheet (5) adjacent to holes (9). Wires (17) are ultrasonically bonded to the chips (3) and extended to the inside of the holes (13) in the polyimide layer (7), where they are ultrasonically bonded to copper (15). Crossover connection of the circuit patterns (17a) are achieved using the same technique. The circuit board is densely populated and cost-effective, with good heat dissipation characteristics.