Impedance controlled flexible circuits with fold-over shields
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United States of America Patent
Stats
-
Nov 16, 1993
Grant Date -
N/A
app pub date -
Apr 27, 1992
filing date -
Apr 27, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved flexible circuit assembly arranged in stripline cable or microstrip configuration with shielding and also being designed with a predetermined characteristic impedance. The flexible printed circuits function as printed cables, and employ spacers on either side of the circuit traces so as to provide ground planes at a predetermined dimensional spacing from the traces comprising the circuit pattern. The arrangement of the present invention further comprises placing two or three individual conductor panels on a common substrate, so as to accommodate folding of the circuit panels, one over the other, to form a multi-layer sandwich. Elongated slots are formed along the fold lines so as to improve the integrity of the assembly, and to reduce buckling.
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