Flexible light emitting semiconductor device having a three dimensional structure

Patent metadata

Field	Value
Publication number	US-9482416-B2
Application number	US-201214357687-A
Country	US
Kind code	B2
Filing date	Nov 20, 2012
Priority date	Nov 23, 2011
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

Provided is an article comprising a flexible circuit comprising a polymeric dielectric layer having first and second major surfaces, one or both of the first and second major surfaces having a conductive layer thereon, wherein at least one conductive layer comprises an electrical circuit configured to power one or more light emitting semi-conductor devices located on the flexible circuit, wherein the flexible circuit is shaped to form a three dimensional structure.

First claim

What is claimed is:

1. An article comprising:
a flexible circuit having first and second sides comprising a polymeric dielectric layer having first and second major surfaces, one or both of the first and second major surfaces having a conductive layer thereon, wherein at least one conductive layer comprises an electrical circuit configured to power one or more light emitting semiconductor devices located on the flexible circuit, and
wherein the flexible circuit is shaped to form a three dimensional structure,
wherein the flexible circuit includes partition lines in the dielectric layer,
wherein sections of the dielectric layer are separated from each other at the partition lines to form the three dimensional structure, and
wherein the flexible circuit has a geometry such that if the flexible circuit were placed in a plane, adjacent sections of the dielectric layer would meet along substantially an entire length of one of the partition lines.

2. The article of claim 1 wherein light emitting semiconductor devices are located on both sides of the flexible circuit.

3. The article of claim 2 wherein the flexible circuit is folded such that all of the light emitting semiconductor devices face a similar direction.

4. The article of claim 1 wherein the flexible circuit is bent to form the three dimensional structure.

5. The article of claim 1 wherein the flexible circuit is folded to form the three dimensional structure.

6. The article of claim 1 wherein the flexible circuit is adhered on one side to a thermal interface material.

7. The article of claim 6 wherein the thermal interface material is adhered to a thermally-conductive substrate.

8. The article of claim 7 wherein the thermally-conductive substrate is a heat sink.

9. The article of claim 6 wherein the thermal interface material is a thermally conductive adhesive.

10. The article of claim 1 wherein the flexible circuit is adhered to a substrate having a reflective surface.

11. The article of claim 1 wherein the flexible circuit is adhered to a substrate having a reflective surface such that the reflective surface is visible between the separated sections of the dielectric layer.

12. The article of claim 1 , wherein the flexible circuit is adhered to a component of a light emitting device.

13. The article of claim 12 wherein the light emitting device is a light bulb.

Assignees

• 3M Innovation Properties Company
• 3M Innovative Properties Co

Inventors

• Narag Alejandro Aldrin Il Agcaoili
• Palaniswamy Ravi
• Jesudoss Arokiaraj
• Mooney Justine A

Classifications

• F21Y2107/00

  Light sources with three-dimensionally disposed light-generating elements · CPC title

• H05K2201/10106

  Light emitting diode [LED] · CPC title

• H05K2201/09063

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

• F21V29/70

  characterised by passive heat-dissipating elements, e.g. heat-sinks · CPC title

• F21K9/00

  Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers · CPC title