Communications: electrical – Continuously variable indicating – With meter reading
Patent
1979-04-20
1982-12-14
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
29577R, 361416, H04Q 350
Patent
active
043640443
ABSTRACT:
In a semiconductor speech path at least a crosspoint element for forming a unitary matrix is formed on a semiconductor chip. The interconnections between the crosspoint elements and the matrix wirings are made on a ceramic wiring plate. By mounting a plurality of semiconductor chips on the ceramic wiring plate by face-down bonding, unitary matrix arrays are formed and at the same time the whole of a matrix array is formed.
A row wiring having first speech path wirings and first selection wirings and a column wiring having second speech path wirings and second selection path wirings are doubly layered on the semiconductor wiring plate, with the intervention of an insulating layer therebetween. The upper layer, except for a pedestal region, is covered with a ceramic insulating layer. Terminals for row and column wirings are arranged in dual-in-line fashion. The speech path terminals of each of the row and column wirings are symmetrically and oppositely disposed to each other. This is correspondingly applied for the selection path terminals. With such a construction, the need for the multi-layered wiring on the semiconductor chip is eliminated, and the manufacturing of chips is simplified. Also crosstalk among the row and column wiring paths on the ceramic wiring plate is lessened and the grid wiring is facilitated.
REFERENCES:
patent: 3484933 (1969-12-01), Hagon
patent: 3525617 (1970-08-01), Bingham
patent: 3704455 (1972-11-01), Scarbrough
patent: 3861023 (1975-01-01), Bennett
patent: 3897626 (1975-08-01), Beausoleil
patent: 4001871 (1977-01-01), Tsunemitsu
patent: 4063993 (1977-12-01), Burns
patent: 4068215 (1978-01-01), Mukaemachi et al.
patent: 4179802 (1979-12-01), Joshi et al.
patent: 4197428 (1980-04-01), Semur et al.
Hitachi , Ltd.
Yusko Donald J.
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