High frequency transmission cable

Patent metadata

Field	Value
Publication number	US-10141621-B2
Application number	US-201715643609-A
Country	US
Kind code	B2
Filing date	Jul 7, 2017
Priority date	Aug 29, 2016
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

The present invention provides a high frequency transmission cable which includes at least one conductor, an insulating layer, a polyolefin resin layer, and a shielding layer. The at least one conductor is covered with the insulating layer. The polyolefin resin layer is coated on an external surface of the insulating layer by a low-k dielectric adhesive layer, and the shielding layer is coated on an external surface of the polyolefin resin layer by another low-k dielectric adhesive layer, wherein the low-k dielectric adhesive layers have a dielectric constant (Dk) less than 3 and a dissipation factor (Df) less than 0.01. Whereby, the high frequency transmission cable can provide high frequency data transmission quality, and can meet the requirement of miniaturization.

First claim

What is claimed is:

1. A high frequency transmission cable, comprising:
at least one conductor;
an insulation layer laminated over the at least one conductor;
a polyolefin resin layer attached to the insulation layer by a first low-k dielectric adhesive layer; and
a shielding layer attached to the polyolefin resin layer by another first low-k dielectric adhesive layer;
wherein the polyolefin resin layer has a thickness less than 100 μm, and the first low-k dielectric adhesive layers each have a dielectric constant (Dk) less than 3 and a dissipation factor (Df) less than 0.01; and
wherein the insulation layer includes a second low-k dielectric adhesive layer and two PET layers attached to two opposite surfaces of the second low-k dielectric adhesive layer, and the at least one conductor is encompassed by the second low-k dielectric adhesive layer and is between the PET layers.

2. The high frequency transmission cable of claim 1 , wherein the polyolefin resin layer is a PE layer.

3. The high frequency transmission cable of claim 1 , wherein the second low-k dielectric adhesive layer has a dielectric constant (Dk) less than 3 and a dissipation factor (Df) less than 0.01.

4. The high frequency transmission cable of claim 1 , wherein the first low-k dielectric adhesive layers each have a thickness between 5 μm and 20 μm, and wherein the second low-k dielectric adhesive layer has a thickness between 5 μm and 100 μm and the PET layers each have a thickness between 10 μm and 60 μm.

5. The high frequency transmission cable of claim 4 , wherein the shielding layer has a thickness between 5 μm and 25 μm.

6. The high frequency transmission cable of claim 1 , further comprising a protective layer attached to the shielding layer by an adhesive layer.

7. The high frequency transmission cable of claim 1 , which is configured for use in a frequency less than 20 GHZ.

8. The high frequency transmission cable of claim 1 , further comprising two protective layers over two exterior surfaces of the shielding layer respectively.

9. The high frequency transmission cable of claim 8 , wherein the protective layers each have a thickness between 5 μm and 200 μm.

Assignees

• Bellwether Electronic Corp

Inventors

• Lee Hsing-Yu
• Hu Jen-Hsu

Classifications

• H01B7/0216

  Two layers · CPC title

• H01B7/17

  Protection against damage caused by external factors, e.g. sheaths or armouring · CPC title

• H01B7/0861

  comprising one or more screens · CPC title

• H05K9/0084

  comprising a single continuous metallic layer on an electrically insulating supporting structure, e.g. metal foil, film, plating coating, electro-deposition, vapour-deposition · CPC title

• H01P3/06

  Coaxial lines · CPC title