Controlling Impedance and Electrical Noise
Predictable electrical characteristics make flex-circuits
an ideal choice for high-speed signal transmission.
Uniform spacing between conductors and grounds,
continuous shield layers, and repeatable geometries are
features that help to control impedance and reduce
crosstalk. And with flex-circuits, you can eliminate
connectors and other transitions that contribute to
Flex-circuit design options to control impedance and
Microstrip a single ground plane beneath the signal
Stripline dual ground layers above and below the
Alternating ground and signal lines in the same plane.
Rigid-flex/stiffened flex-circuits with uninterrupted
Silver epoxy coating. Silver epoxy is applied to the
outside of circuits and electrically connected to other
layers via access holes in the cover coat. Silver epoxy
shielding can be less costly and is more flexible than
Minco can provide tight tolerance on line width,
spacing, and distance to ground layers in order to meet
your required impedance value. Actual impedance will
also depend on the circuit's shape after installation.
Contact Minco for advice on designing circuits to
specific electric characteristics.
Flex-Coils are flex-circuits containing integral wire coils
for use as antennas or inductors. There are three basic
types of Flex-Coils:
Simple, flat coils with wire leads
Coils laminated inside flex-circuits
`Rim' coils that are built up in the Z-axis.
Flex-Coils have the same advantages that a flex-circuit
does. Wiring errors are reduced because the coil is
oriented in the same spot every time, which provides
repeatable signals. Flex-Coils are rugged and easy to
assemble, and their design usually guarantees a
reduced package size. A Flex-Coil can terminate in any
manner that a flex-circuit can, or to a wire lead. Heavy
wire leads are available.
See Bulletin FC-1, Flex-Coils, for more information on
Flex-Coil capabilities, design considerations, and the
information required for a quote or build.
Tel: (763) 571-3121 K Fax: (763) 571-0927 K www.minco.com
Application Aid #24