Flexible flat cable and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-11961640-B2
Application number	US-202016970275-A
Country	US
Kind code	B2
Filing date	Jul 15, 2020
Priority date	Jul 25, 2019
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

A flexible flat cable according to various embodiments of the disclosure may include a first insulation layer having a plate shape, a first conductive pattern disposed on the first insulation layer, a second conductive pattern disposed on the first insulation layer to be spaced apart from the first conductive pattern at a predetermined interval, a second insulation layer covering at least a portion of the first conductive pattern and disposed on the first insulation layer to cover the first conductive pattern, a first shield member including a first shield layer disposed on the first insulation layer and the second insulation layer to cover the first conductive pattern and the second conductive pattern, and a second shield layer disposed on the first shield layer to cover the first shield layer, and a third insulation layer surrounding the first shield layer such that at least a portion of the first shield layer of the first shield member, which is exposed between the first insulation layer and the second shield layer of the first shield member is covered.

First claim

The invention claimed is:

1. A flexible flat cable comprising:
a first insulation layer having a plate shape;
a first conductive pattern disposed on the first insulation layer;
a second conductive pattern disposed on the first insulation layer to be spaced apart from the first conductive pattern at a predetermined interval;
a second insulation layer covering at least a portion of the first conductive pattern and disposed on the first insulation layer to cover the second conductive pattern;
a first shield member comprising a first shield layer disposed on the first insulation layer and the second insulation layer to cover the first conductive pattern and the second insulation layer, and a second shield layer disposed on the first shield layer to cover the first shield layer; and
a third insulation layer surrounding the first shield layer such that at least a portion of the first shield layer of the first shield member, which is exposed between the first insulation layer and the second shield layer of the first shield member is covered,
wherein the first insulation layer comprises a first surface, on which the first conductive pattern and the second conductive pattern are disposed, and a second surface corresponding to an opposite surface to the first surface, and
wherein the flexible flat cable further comprises:
a second shield member comprising a third shield layer disposed on the second surface of the first insulation layer and a fourth shield layer disposed on the third shield layer, and
a fourth insulation layer surrounding the second shield layer such that at least a portion of the third shield layer of the second shield member, which is exposed between the first insulation layer and the fourth shield layer of the second shield layer is covered.

2. The flexible flat cable of claim 1 , wherein the first conductive pattern comprises at least one ground line.

3. The flexible flat cable of claim 2 , wherein the second conductive pattern comprises at least one signal transmission line that transmits an electrical signal.

4. The flexible flat cable of claim 3 , wherein the first shield member is configured such that at least a portion of an end of the first shield member is disposed to be spaced apart from an end of the first insulation layer at a predetermined interval and at least a portion of the end of the first shield member is disposed to be closer to the center of the flexible flat cable than to an end of the first insulation layer.

5. The flexible flat cable of claim 4 , wherein the third insulation layer is disposed on the first insulation layer to fill a space between the end of the first shield member and the end of the first insulation layer to block the first shield layer of the first shield member, which is exposed between the first insulation layer and the second shield layer of the first shield member from outside.

6. The flexible flat cable of claim 5 ,
wherein the first shield layer of the first shield member is formed of a conductive material, and
wherein the first shield layer of the first shield member is electrically connected to the first conductive pattern.

7. The flexible flat cable of claim 6 , wherein the first shield layer of the first shield member is formed of a conductive bonding material.

8. The flexible flat cable of claim 6 , wherein the second shield member is configured such that at least a portion of an end of the second shield member is disposed to be spaced apart from an end of the first insulation layer at a predetermined interval and at least a portion of the end of the second shield member is disposed to be closer to the center of the flexible flat cable than to an end of the first insulation layer.

9. The flexible flat cable of claim 8 , wherein the fourth insulation layer is disposed on the first insulation layer to fill a space between the end of the second shield member and the end of the first insulation layer to block the third shield layer of the second shield member, which is exposed between the first insulation layer and the fourth shield layer of the second shield member from the outside.

10. The flexible flat cable of claim 9 , wherein the third shield layer of the second shield member is formed of a conductive bonding material.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Bae Bumhee
• Yeom Junghwan
• Jang Changwon
• Cheon Jeongnam

Classifications

• H01B7/08 Primary

  Flat or ribbon cables · CPC title

• H01B11/203

  forming a flat arrangement · CPC title

• H05K1/0221 Primary

  Coaxially shielded signal lines comprising a continuous shielding layer partially or wholly surrounding the signal lines · CPC title

• H01B7/0861 Primary

  comprising one or more screens · CPC title

• H05K1/0393

  Flexible materials (H05K1/038 takes precedence; specific organic compositions are classified in H05K1/0313 and subgroups) · CPC title