# US 8,541,797 B2 · Illuminator and method for producing such illuminator

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- Number: US 8,541,797 B2
- Document ID: US8541797B2
- Status: Granted
- Kind: B2
- Application number: 11/719,240
- Filed: 2005-11-14
- Published: 2009-03-26
- Granted: 2013-09-24
- Earliest claimed: 2004-11-18
- Assignees: Koninklijke Philips N.V.
- Applicants: Christoph Gerard August Hoelen; Antonius Constant Johanna Cornelis Van Den Ackerveken; Cornelius Franciscus Jozef Rutjes; Koen Van Os; Marc Andre De Samber; Theodoor Cornelis Treurniet
- Inventors: Christoph Gerard August Hoelen; Antonius Constant Johanna Cornelis Van Den Ackerveken; Cornelius Franciscus Jozef Rutjes; Koen Van Os; Marc Andre De Samber; Theodoor Cornelis Treurniet
- Web page: https://patentgrep.com/patent/US8541797B2

## CPC

- H10H 20/856: Reflecting means
- H10W 72/20: Bump connectors, e.g. solder bumps or copper pillars; Dummy bumps; Thermal bumps
- H10W 90/724: {between a chip and a stacked insulating package substrate, interposer or RDL}
- H10W 90/754: {between a chip and a stacked insulating package substrate, interposer or RDL}
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

An illuminator includes a substrate, a structured conductive layer applied to one surface of the substrate, and at least one light source connected to the structured conductive layer. The illuminator further includes an unstructured reflective layer applied on top of the structured conductive layer. The unstructured reflective layer has an essentially continuous extension at least in a surrounding of the at least one light source.

## Claims

### Claim 1

An illuminator having an exit surface and comprising:
a substrate;
a structured conductive layer applied on said substrate;
an isolating layer applied on said structured conductive layer; at least one light source located on a first portion of the exit surface of the illuminator and connected to said structured conductive layer; and
a reflective layer applied on apart of the said isolating layer covering a second portion of the exit surface of the illuminator adjacent the at least one light source and surrounding said at least one light source, said reflective layer covering substantially all the exit surface of the illuminator not occupied by said at least one light source, wherein the reflective layer includes parts where the reflective layer is etched to accommodate the at least one light source, wherein the first portion of the exit surface is parallel to the second portion of the exit surface, and wherein the at least one light source protrudes from the reflective layer, wherein the exit surface is an outer surface of the illuminator for exit of light from the illuminator,
Wherein, the one light source is not in direct contact with the isolating layer and the reflective layer.

### Claim 2 (depends on 1)

The illuminator according to claim 1, wherein said isolating layer comprises contact holes for enabling between the at least one light source and the structured conductive layer.

### Claim 3 (depends on 1)

The illuminator according to claim 1, wherein said at least one light source is one of a flip chip light source and a wire bonded light source.

### Claim 4 (depends on 1)

The illuminator according to claim 1, wherein said at least one light source is a light emitting diode.

### Claim 5

A method for producing an illuminator having an exit surface, said method comprising the acts of:
providing a substrate;
applying a structured conductive layer on said substrate;
applying an isolating layer on said structured conductive layer;
applying a reflective layer on a part of the said isolating layer covering a portion of the exit surface of the illuminator;
etching parts of the reflective layer; and
placing at least one light source on the parts of the reflective layer that are etched for contacting the structured conductive layer,
wherein the reflective layer is on a first portion of the exit surface of the illuminator adjacent a second portion of the exit surface of the illuminator where the at least one light source is located, the reflective layer surrounding of the at least one light source, and wherein the reflective layer and the at least one light source cover substantially all the exit surface of the illuminator not occupied by any electrical connectors associated with the at least one light source,
wherein the first portion of the exit surface is parallel to the second portion of the exit surface and the at least one light source protrudes from the reflective layer, and wherein the exit surface is an outer surface of the illuminator for exit of light from the illuminator,
Wherein, the one light source is not in direct contact with the isolating layer and the reflective layer.

### Claim 6 (depends on 5)

The method according to claim 5, further comprising the act of:
providing contact holes in the isolating layer for enabling connection the at least one light source and the structured conductive layer.

### Claim 7 (depends on 1)

The illuminator of claim 1, further comprising a dielectric layer between the isolation layer and the substrate.

### Claim 8 (depends on 5)

The method of claim 5, further comprising the act of forming a dielectric layer between the isolation layer and the substrate.