Printed flexible circuit

Patent metadata

Field	Value
Publication number	US-9875834-B2
Application number	US-201615184626-A
Country	US
Kind code	B2
Filing date	Jun 16, 2016
Priority date	Jun 16, 2015
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

A flexible printed circuit may include a flexible body portion and a flexible head end portion, where conductors and/or elongated cut outs may be formed in a pattern. The flexible body may include a proximal end and a distal end, wherein the proximal end is configured to be connected to a stationary object and the distal end is configured to be connected to a moving object that moves in relation to the stationary object. The head end of the flexible printed circuit may be located at the distal end of the flexible body. The head end may include a plurality of elongated cut-outs, and/or a plurality of electrical connection pads suspended from the flexible body by the plurality of elongated cutouts.

First claim

What is claimed is:

1. A flexible printed circuit comprising:
a flexible body having a proximal end and a distal end, wherein the proximal end is configured to be connected to a stationary object and the distal end is configured to be connected to a moving object that moves in relation to the stationary object;
a head end of the flexible printed circuit at the distal end of the flexible body, the head end comprising:
a plurality of elongated cut-outs;
a plurality of electrical connection pads; and
a center opening of the flexible head-end, wherein the center opening is at least nearly co-centric with the flexible head-end and the plurality of elongated cutouts; and
wherein the plurality of electrical connection pads are located between an interior cutout of the plurality of elongated cutouts and the center opening of the head end.

2. The flexible printed circuit of claim 1 comprising:
at least one line of symmetry associated with the flexible body and the head end of the flexible body, the line of symmetry defines lateral symmetry from the proximal end of the body to a distal end of the head end of the flexible printed circuit.

3. The flexible printed circuit of claim 2 , wherein the line of symmetry is orthonormal to an axis of motion of the moving object in relation to the stationary object.

4. The flexible printed circuit of claim 2 , comprising a first electrical conduction path at a first side of the line of symmetry and a second electrical conduction path at a second side of the line of symmetry.

5. The flexible printed circuit of claim 1 , wherein a torsion induced at the head end of the flexible printed circuit by a movement of the moving object is compensated before being transferred to the flexible body.

6. The flexible printed circuit of claim 1 , wherein the opening is configured to receive a portion of the moving object.

7. The flexible printed circuit of claim 6 , wherein the opening near the center of the head end is nearly circular.

8. The flexible printed circuit of claim 6 , wherein a center of the opening lies on a line of symmetry along the head end.

9. The flexible printed circuit of claim 1 , comprising a flexible plastic substrate.

10. The flexible printed circuit of claim 9 , wherein the flexible plastic substrate comprises a polyimide.

11. The flexible printed circuit of claim 9 , further comprising a plurality of reinforced portions of the flexible circuit, the reinforced portions comprising additional substrate material of the flex body or the flex head.

12. The flexible printed circuit of claim 11 , wherein the plurality of reinforced portions of the flex body or the flex head comprise a polyimide stiffener.

13. The flexible printed circuit of claim 1 , comprising a physical connection point and the plurality of electrical connection pads suspended near the center of the flex head.

14. The flexible printed circuit of claim 13 , wherein the physical connection point and the plurality of electrical connection pads are in a spaced relationship about a line of symmetry defining lateral symmetry of the flexible printed circuit.

15. A flexible printed circuit, comprising:
a flexible head end comprising a plurality of electrical conductors symmetrically arranged about a line of symmetry;
a plurality of electrical connection pads, each electrical connection pad being electrically coupled to a corresponding one of the plurality of electrical conductors; and
a plurality of elongated cut-outs in the flexible head end, the elongated cut-outs symmetrically arranged about the line of symmetry, wherein a torsion applied near the center of the flexible head end is minimized before being transferred along a flexible body of the flexible printed circuit extending from the flexible head-end; and
a center opening of the flexible head-end, wherein the center opening is at least nearly co-centric with the flexible head-end and the plurality of elongated cutouts.

16. The flexible printed circuit of claim 15 , comprising at least one physical connection point, wherein the center of the at least one physical connection point is located on or near the line of symmetry.

17. The flexible printed circuit of claim 15 , further comprising a flexible body extending along the line of symmetry from the head end, wherein the plurality of electrical conductors extend along the line of symmetry to transfer electrical energy from a stationary electrical connection to an object moving linearly along the line of symmetry.

Assignees

• Sensata Technologies Inc

Inventors

• Eral Janselme M
• Guerrero Richard R

Classifications

• H05K2201/09063

  Holes or slots in insulating substrate not used for electrical connections · CPC title

• H05K1/111 Primary

  Pads for surface mounting, e.g. lay-out · CPC title

• H05K1/028 Primary

  Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence) · CPC title

• H01F7/0205 Primary

  Magnetic circuits with PM in general · CPC title

• H05K2201/0154

  Polyimide · CPC title