Semi-flexible ridged printed circuit board assembly

Patent metadata

Field	Value
Publication number	US-11109478-B2
Application number	US-201816190426-A
Country	US
Kind code	B2
Filing date	Nov 14, 2018
Priority date	Nov 15, 2017
Publication date	Aug 31, 2021
Grant date	Aug 31, 2021

Abstract

According to one or more embodiments described herein, an electronic power steering system includes a motor, and a semi-flexible ridged printed circuit board (PCB) assembly that is coupled with the motor. The semi-flexible ridged PCB assembly includes a first portion, a second portion, and a bendable member that couples the first portion and the second portion. The first portion is bendable with respect to the second portion using the bendable member.

First claim

What is claimed is:

1. An electronic power steering system comprising:
a motor; and
a semi-flexible ridged printed circuit board (PCB) assembly that is coupled with the motor, the semi-flexible ridged PCB assembly comprises:
a first portion of rigid PCB material;
a second portion of rigid PCB material;
a bendable member of rigid PCB material with at least one milled portion, the at least one milled portion having a thickness less than a thickness of the first portion and the second portion, the bendable member couples the first portion and the second portion and spaces the first portion from the second portion, the first portion being bendable with respect to the second portion using the at least one milled portion of the bendable member;
wherein the bendable member is formed at least partially of copper material and the bendable member is pre-impregnated; and
wherein the milled portion is formed in the copper material by depth controlled milling of the bendable member that is pre-impregnated.

2. The electronic power steering system of claim 1 , wherein the first portion is bendable by 180° to substantially overlap the second portion.

3. The electronic power steering system of claim 1 , wherein bending the first portion reduces a cross-sectional dimension of the semi-flexible ridged PCB assembly to be substantially equal to a cross-sectional dimension of the motor.

4. The electronic power steering system of claim 2 , wherein the bendable member is a first bendable member, and the semi-flexible ridged PCB assembly further comprises:
a third portion; and
a second bendable member that couples the third portion and the second portion and spaces the third portion from the second portion, the third portion being bendable with respect to the second portion using the second bendable member.

5. The electronic power steering system of claim 4 , wherein the first portion is bendable with respect to the second portion in a first direction and wherein the third portion is bendable with respect to the second portion in a second direction.

6. The electronic power steering system of claim 5 , wherein the third portion is bendable by 180° to substantially overlap the first portion and the second portion.

7. A semi-flexible ridged printed circuit board comprising:
a first portion of rigid PCB material;
a second portion of rigid PCB material;
a bendable member of rigid PCB material with at least one milled portion the at least one milled portion having a thickness less than a thickness of the first portion and the second portion, the bendable member couples the first portion and the second portion and spaces the first portion from the second portion, the first portion being bendable with respect to the second portion using the at least one milled portion of the bendable member;
wherein the bendable member is formed at least partially of copper material and the bendable member is pre-impregnated; and
wherein the milled portion is formed in the copper material by depth controlled milling of the bendable member that is pre-impregnated.

8. The semi-flexible ridged printed circuit board of claim 7 , wherein the first portion is bendable by 180° to substantially overlap and be spaced from the second portion.

9. The semi-flexible ridged printed circuit board of claim 7 , wherein the bendable member is a first bendable member, and the semi-flexible ridged printed circuit board further comprises:
a third portion; and
a second bendable member that couples the third portion and the second portion and spaces the third portion from the second portion, the third portion being bendable with respect to the second portion using the second bendable member.

10. The semi-flexible ridged printed circuit board of claim 9 , wherein the first portion is bendable with respect to the second portion in a first direction and wherein the third portion is bendable with respect to the second portion in a second direction.

11. The semi-flexible ridged printed circuit board of claim 10 , wherein the third portion is bendable by 180° to substantially overlap the first portion and the second portion.

12. A system comprising:
a motor; and
a motor control system comprising a semi-flexible ridged printed circuit board comprising one or more electronic circuits to control operation of the motor, the semi-flexible ridged printed circuit board comprising:
a first portion of rigid PCB material comprising connector circuits for coupling the semi-flexible ridged printed circuit board with the motor;
a second portion of rigid PCB material comprising one or more controllers for operating the motor;
a bendable member of rigid PCB material with at least one milled portion the at least one milled portion having a thickness less than a thickness of the first portion and the second portion, the bendable member couples the first portion and the second portion and spaces the first portion from the second portion, the first portion being bendable with respect to the second portion using the at least one milled portion of the bendable member;
wherein the bendable member is formed at least partially of copper material and the bendable member is pre-impregnated; and
wherein the milled portion is formed in the copper material by depth controlled milling of the bendable member that is pre-impregnated.

13. The system of claim 12 , wherein the first portion is bendable by 180° to substantially overlap the second portion.

14. The system of claim 12 , wherein the bendable member is a first bendable member, and the semi-flexible ridged printed circuit board further comprises:
a third portion; and
a second bendable member that couples the third portion and the second portion, the third portion being bendable with respect to the second portion using the second bendable member.

15. The system of claim 14 , wherein the first portion is bendable with respect to the second portion in a first direction and wherein the third portion is bendable with respect to the second portion in a second direction.

16. The system of claim 15 , wherein the third portion is bendable by 180° to substantially overlap the second portion.

17. The system of claim 12 , wherein bending the first portion reduces a cross-sectional dimension of the semi-flexible ridged printed circuit board to be substantially equal to a cross-sectional dimension of the motor.

Assignees

• Steering Solutions Ip Holding

Inventors

• Klenk Daniel J
• Streng Delynn
• Yaklin Ryan D
• Chu John I
• Roller Neal R

Classifications

• B62D5/0406 Primary

  including housing for electronic control unit · CPC title

• H05K2201/042

  Stacked spaced PCBs; Planar parts of folded flexible circuits having mounted components in between or spaced from each other · CPC title

• H05K3/4691

  Rigid-flexible multilayer circuits comprising rigid and flexible layers, e.g. having in the bending regions only flexible layers · CPC title

• H05K1/028 Primary

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

• B62D5/0409

  Electric motor acting on the steering column · CPC title