Flexible cable for low profile electrical device
View Patent ↗A flexible cable with a substrate divided into at least two sections is disclosed. The first section includes a first electrically conductive track and a first attach pad, while the section includes a second and third electrically conductive tracks, as well as a second attach pad. The first section is disposed on the second section to align the attach pads and connect the first electrically conductive track to the third electrically conductive track. The resulting flexible cable can be used with a low profile electrical device.
1. A flexible cable comprising:
a flexible substrate comprising a first section at a first end of the flexible substrate, a second section at a second end of the flexible substrate opposite the first end of the flexible substrate, and a third section between the first section and the second section, wherein
the first section of the flexible substrate comprises a first electrically conductive track disposed on the flexible substrate and a first attach pad disposed on the flexible substrate, wherein the first attach pad is located proximate to the third section and the first electrically conductive track connects to, and extends away from, the first attach pad toward the first end of the flexible substrate;
the second section of the flexible substrate comprises a second electrically conductive track disposed on the flexible substrate, a third electrically conductive track disposed on the flexible substrate parallel to the second electrically conductive track, and a second attach pad disposed on the flexible substrate, wherein the second attach pad is located proximate the third section, the second electrically conductive track connects to, and extends away from, the second attach pad toward the second end of the flexible substrate, and the third electrically conductive track extends away from the second attach pad toward the second end of the flexible substrate leaving a gap between the second attach pad and the third electrically conductive track; and
the third section of the flexible substrate comprises a foldable line located between the first attach pad and the second attach pad, wherein the first attach pad will align with the second attach pad when the first section of the flexible substrate is folded onto the second section of the flexible substrate.
2. The flexible cable of claim 1 , further comprising a first solder resist disposed on a first portion of the first electrically conductive track, wherein the first solder resist extends away from the first attach pad toward the first end of the flexible substrate leaving a second portion of the first electrically conductive track proximate to the first end of the flexible substrate exposed for soldering.
3. The flexible cable of claim 2 , wherein the first solder resist and the gap between the second attach pad have substantially the same lengths.
4. The flexible cable of claim 2 , further comprising a second solder resist disposed on a first portion of the second electrically conductive track, wherein the second solder resist extends away from the second attach pad toward the second end of the flexible substrate leaving a second portion of the second electrically conductive track proximate to the second attach pad exposed for soldering and leaving a third portion of the second electrically conductive track proximate to the second end exposed for soldering.
5. The flexible cable of claim 4 , wherein the second portion of the first electrically conductive track exposed for soldering and the second portion of the second electrically conductive track exposed for soldering have substantially the same lengths.
6. The flexible cable of claim 4 , further comprising a third solder resist disposed on a fourth portion of the second electrically conductive track, wherein the third solder resist extends away from the second attach pad toward the second end of the flexible substrate while leaving the second portion of the second electrically conductive track exposed for soldering.
7. The flexible cable of claim 6 , wherein the third solder resist and the gap between the first attach pad and the fourth track have substantially the same lengths.
8. The flexible cable of claim 6 , further comprising a fourth solder resist disposed on a first portion of the third electrically conductive track, wherein the fourth solder resist extends away from the second attach pad toward the second end of the flexible substrate leaving a second portion of the third electrically conductive track proximate to the second attach pad exposed for soldering and leaving a third portion of the third electrically conductive track proximate to the second end exposed for soldering.
9. The flexible cable of claim 8 , wherein the second portion of the second electrically conductive track and the fourth track have substantially the same lengths.
10. The flexible cable of claim 4 , wherein the foldable line is located at an equal distance from both the first attach pad and the second attach pad.
11. The flexible cable of claim 1 , wherein the first section of the flexible substrate 3 further comprises a fourth track disposed on the flexible substrate parallel to the first electrically conductive track, wherein the fourth track extends away from the first attach pad toward the first end of the flexible substrate leaving a gap between the first attach pad and the fourth track.