Microminiature coaxial cable and method of manufacture

Patent · Sat Dec 31 23:00:00 EST 1988

OSTI ID:866896

Bongianni, Wayne L ^[1]

---

1. Los Alamos, NM

A coaxial cable is provided having a ribbon inner conductor surrounded by a dielectric and a circumferential conductor. The coaxial cable may be microminiature comprising a very thin ribbon strip conductor from between 5 to 15 .mu.m thick and from 150 to 200 .mu.m wide, having a surrounding foamed dielectric or parylene applied thereon by a vapor plasma process and an outer conductor of an adhering high conductivity metal vacuum deposited on the dielectric. Alternately, the foam dielectric embodiment may have a contiguous parylene coating applied adjacent the inner conductor or the outer conductor or both. Also, the cable may be fabricated by forming a thin ribbon of strip conductive material into an inner conductor, applying thereabout a dielectric by spraying on a solution of polystyrene and polyethylene and then vacuum depositing and adhering high conductivity metal about the dielectric. The cable strength may be increased by adding glass microfilament fibers or glass microspheres to the solution of polystyrene and polyethylene. Further, the outer conductive layer may be applied by electroless deposition in an aqueous solution rather than by vacuum deposition. A thin coating of parylene is preferably applied to the outer conductor to prevent its oxidation and inhibit mechanical abrasion.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM
• DOE Contract Number: W-7405-ENG-36
• Assignee: University of California (Berkeley, CA)
• Patent Number(s): US 4816618
• OSTI ID: 866896
• Country of Publication: United States
• Language: English

Related Subjects

/174/156/333/427/428/
15
150
200
abrasion
adding
adding glass
adhering
adjacent
alternately
applied
applying
aqueous
aqueous solution
cable
circumferential
circumferential conductor
coating
coating applied
coaxial
coaxial cable
comprising
conductive
conductive layer
conductive material
conductivity
conductivity metal
conductor
conductor surrounded
contiguous
deposited
depositing
deposition
dielectric
electroless
electroless deposition
embodiment
fabricated
fibers
foam
foamed
forming
glass
glass microsphere
glass microspheres
increased
inhibit
inner
inner conductor
layer
manufacture
material
mechanical
metal
metal vacuum
method
microfilament
microminiature
microminiature coaxial
microminiature comprising
microspheres
miniature coaxial
outer
outer conductive
outer conductor
oxidation
parylene
plasma
plasma process
polyethylene
polystyrene
preferably
preferably applied
prevent
process
provided
ribbon
ribbon inner
ribbon strip
solution
spraying
strength
strip
surrounded
surrounding
thereabout
thereon
thick
vacuum
vacuum deposited
vacuum depositing
vacuum deposition
vapor
vapor plasma
wide