# US 11,114,583 B2 · Light emitting device encapsulated above electrodes

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- Number: US 11,114,583 B2
- Document ID: US11114583B2
- Status: Granted
- Kind: B2
- Application number: 16/705,235
- Filed: 2019-12-06
- Published: 2020-04-09
- Granted: 2021-09-07
- Earliest claimed: 2016-12-27
- Assignees: Nichia Corporation
- Applicants: Nichia Corporation
- Inventors: Masafumi Kuramoto; Daisuke Iwakura
- Web page: https://patentgrep.com/patent/US11114583B2

## CPC

- H10H 20/018: {Bonding of wafers}
- H10H 20/8512: {Wavelength conversion materials}
- H10H 20/8514: {characterised by their shape, e.g. plate or foil}
- H10H 20/8516: {having a non-uniform spatial arrangement or non-uniform concentration, e.g. patterned wavelength conversion layer or wavelength conversion layer with a concentration gradient}
- H10H 20/856: Reflecting means
- H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls
- H10W 70/09: extending onto an encapsulation that laterally surrounds the chip or wafer, e.g. fan-out wafer level package [FOWLP] RDLs
- H10W 70/60: Insulating or insulated package substrates; Interposers; Redistribution layers (leadframes H10W70/40)
- H10W 72/0198: {batch processes}
- H10H 20/01: Manufacture or treatment
- H10H 20/0361: {of wavelength conversion means}
- H10H 20/0363: {of optical field-shaping means}
- H10H 20/0364: {of interconnections}
- H10W 74/014: {using batch processing}
- H10W 74/019: {using temporary auxiliary substrates (H10W74/017 takes precedence)}
- 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

A light emitting element includes a light emitting element having a first face on which a first electrode and a second electrode are provided. A wavelength converting material covers a whole of the light emitting element except for the first face such that a surface of the wavelength converting material and the first face constitute a substantially flat plane. A first electrically conductive material is provided on the first face and the surface of the wavelength converting material to be electrically connected to the first electrode. A second electrically conductive material is provided on the first face and the surface of the wavelength converting material to be electrically connected to the second electrode. An insulating member is disposed on the first electrically conductive material, the second electrically conductive material, and the first face between the first electrode and the second electrode.

## Claims

### Claim 1

A light emitting device comprising:
a light emitting element having a first face on which a first electrode and a second electrode are provided;
a wavelength converting member covering a whole of the light emitting element except for the first face such that a first surface of the wavelength converting member and the first face constitute a substantially flat plane;
a first electrically conductive material having a first conductive material surface connected to the first face and the first surface of the wavelength converting member to be electrically connected to the first electrode and a second conductive material surface opposite to the first conductive material surface in a thickness direction perpendicular to the substantially flat plane;
a second electrically conductive material having a third conductive material surface connected to the first face and the first surface of the wavelength converting member to be electrically connected to the second electrode and a fourth conductive material surface opposite to the third conductive material surface in the thickness direction; and
an insulating member comprising:
a first part disposed on the first electrically conductive material such that the first electrically conductive material is provided between the first part and the first face and is provided between the first part and the wavelength converting member, the first part having a first insulating member surface connected to a part of the second conductive material surface and a second insulating member surface opposite to the first insulating member surface in the thickness direction, the second insulating member surface being separated in the thickness direction from a remaining part of the second conductive material surface other than the part of the second conductive material surface;
a second part disposed on the second electrically conductive material such that the second electrically conductive material is provided between the second part and the first face and is provided between the second part and the wavelength converting member, the second part having a third insulating member surface connected to a part of the fourth conductive material surface and a fourth insulating member surface opposite to the third insulating member surface in the thickness direction, the fourth insulating member surface being separated in the thickness direction from a remaining part of the fourth conductive material surface other than the part of the fourth conductive material surface; and
a third part integrated with the first part and the second part to contact the first face between the first electrode and the second electrode.

### Claim 2 (depends on 1)

The light emitting device according to claim 1,
wherein the light emitting element has
a second face opposite to the first face in a height direction along a height of the light emitting device and
a lateral face connecting the first face and the second face,
wherein the wavelength converting member covers the second face and the lateral face,
wherein the wavelength converting member has a second surface opposite to the first surface of the wavelength converting member and the first face in the height direction, and
wherein a height difference between a first height and a second height is 5 μm at most, the first height being a height between the first surface and the second surface in the height direction, the second height being a height between the first face and the second surface in the height direction.

### Claim 3 (depends on 1)

The light emitting device according to claim 1,
wherein the light emitting element has
a second face opposite to the first face in a height direction along a height of the light emitting device and
a lateral face connecting the first face and the second face,
wherein the wavelength converting member covers the second face and the lateral face,
wherein the wavelength converting member has an inner periphery surrounding the light emitting element viewed in the height direction and an outer periphery surrounding the inner periphery viewed in the height direction, and
wherein the outer periphery is covered with a reflective material viewed in the height direction.

### Claim 4 (depends on 1)

The light emitting device according to claim 1, wherein the wavelength converting member has a flexural modulus of 1000 MPa at most.

### Claim 5 (depends on 1)

The light emitting device according to claim 1,
wherein the insulating member is disposed on a portion of the first electrically conductive material, and
wherein the insulating member is disposed on a portion of the second electrically conductive material.

### Claim 6 (depends on 1)

The light emitting device according to claim 1,
wherein the light emitting element has
a second face opposite to the first face in a height direction along a height of the light emitting device and
a lateral face connecting the first face and the second face,
wherein the wavelength converting member covers the second face and the lateral face,
wherein the first electrically conductive material has
a first narrow portion having a first end connected to the first electrode and a second end opposite to the first end in a first direction perpendicular to the height direction, and
a first wide portion electrically connected to the second end of the first narrow portion such that the first wide portion does not overlap with the light emitting element when viewed in the height direction, the first narrow portion having a first portion width in a second direction perpendicular to the first direction and the height direction, the first wide portion having a second portion width larger than the first portion width in the second direction.

### Claim 7 (depends on 6)

The light emitting device according to claim 6,
wherein the light emitting element has an element width in the second direction,
wherein the first portion width is smaller than or equal to the element width of the light emitting element in the second direction, and
wherein the second portion width is larger than the element width of the light emitting element in the second direction.

### Claim 8 (depends on 6)

The light emitting device according to claim 6,
wherein the second electrically conductive material has
a second narrow portion having a third end connected to the second electrode and a fourth end opposite to the third end in the first direction and
a second wide portion electrically connected to the fourth end of the second narrow portion such that the second wide portion does not overlap with the light emitting element when viewed in the height direction, the second narrow portion having a third portion width in the second direction, the second wide portion having a fourth portion width larger than the third portion width in the second direction, and
wherein the second electrode is opposite to the first electrode in the first direction.

### Claim 9 (depends on 6)

The light emitting device according to claim 6,
wherein the second electrically conductive material has
a second narrow portion having a third end connected to the second electrode and a fourth end opposite to the third end in the first direction and
a second wide portion electrically connected to the fourth end of the second narrow portion such that the second wide portion does not overlap with the light emitting element when viewed in the height direction, the second narrow portion having a third portion width in the second direction, the second wide portion having a fourth portion width larger than the third portion width in the second direction, and
wherein the second electrode is opposite to the first electrode in the second direction.

### Claim 10 (depends on 1)

The light emitting device according to claim 1,
wherein the insulating member has a rectangular shape having four corners, and
wherein neither the first electrically conductive material nor the second electrically conductive material overlaps with the insulating member at the four corners.

### Claim 11 (depends on 1)

The light emitting device according to claim 1,
wherein the light emitting element has
a second face opposite to the first face in a height direction along a height of the light emitting device and
a lateral face connecting the first face and the second face,
wherein the wavelength converting member covers the second face and the lateral face,
wherein the insulating member overlaps with entirety of the light emitting element as viewed in the height direction.

### Claim 12

A light emitting device comprising:
a light emitting element having a first face on which a first electrode and a second electrode are provided;
a wavelength converting member covering a whole of the light emitting element except for the first face such that a first surface of the wavelength converting member and the first face constitute a substantially flat plane;
a first electrically conductive material having a first conductive material surface connected to the first surface of the wavelength converting member outside the first face to be electrically connected to the first electrode and a second conductive material surface opposite to the first conductive material surface in a thickness direction perpendicular to the substantially flat plane;
a second electrically conductive material having a third conductive material surface connected to the first surface of the wavelength converting member outside the first face to be electrically connected to the second electrode and a fourth conductive material surface opposite to the third conductive material surface in the thickness direction; and
an insulating member comprising:
a first part disposed on the first electrically conductive material such that the first electrically conductive material is provided between the first part and the first face and is provided between the first part and the wavelength converting member, the first part having a first insulating member surface connected to a part of the second conductive material surface and a second insulating member surface opposite to the first insulating member surface in the thickness direction, the second insulating member surface being separated in the thickness direction from a remaining part of the second conductive material surface other than the part of the second conductive material surface;
a second part disposed on the second electrically conductive material such that the second electrically conductive material is provided between the second part and the first face and is provided between the second part and the wavelength converting member, the second part having a third insulating member surface connected to a part of the fourth conductive material surface and a fourth insulating member surface opposite to the third insulating member surface in the thickness direction, the fourth insulating member surface being separated in the thickness direction from a remaining part of the fourth conductive material surface other than the part of the fourth conductive material surface; and
a third part integrated with the first part and the second part to contact the first face between the first electrode and the second electrode.

### Claim 13 (depends on 12)

The light emitting device according to claim 12, further comprising:
a first wire connecting the first electrode and the first electrically conductive material, and
a second wire connecting the second electrode and the second electrically conductive material, the insulating material covering a whole of the first wire and the second wire.

### Claim 14 (depends on 12)

The light emitting device according to claim 12,
wherein the insulating member is disposed on a portion of the first electrically conductive material, and
wherein the insulating member is disposed on a portion of the second electrically conductive material.

### Claim 15 (depends on 12)

The light emitting device according to claim 12,
wherein the light emitting element has
a second face opposite to the first face in a height direction along a height of the light emitting device, and
a lateral face connecting the first face and the second face,
wherein the wavelength converting member covers the second face and the lateral face,
wherein the wavelength converting member has an inner periphery surrounding the light emitting element viewed in the height direction and an outer periphery surrounding the inner periphery viewed in the height direction, and
wherein the outer periphery is covered with a reflective material viewed in the height direction.

### Claim 16 (depends on 12)

The light emitting device according to claim 12, wherein the wavelength converting member has a flexural modulus of 1000 MPa at most.

### Claim 17 (depends on 12)

The light emitting device according to claim 12,
wherein the light emitting element has
a second face opposite to the first face in a height direction along a height of the light emitting device and
a lateral face connecting the first face and the second face,
wherein the wavelength converting member covers the second face and the lateral face,
wherein the first electrically conductive material has
a first narrow portion having a first end connected to the first electrode and a second end opposite to the first end in a first direction perpendicular to the height direction, and
a first wide portion electrically connected to the second end of the first narrow portion such that the first wide portion does not overlap with the light emitting element when viewed in the height direction, the first narrow portion having a first portion width in a second direction perpendicular to the first direction and the height direction, the first wide portion having a second portion width larger than the first portion width in the second direction.

### Claim 18 (depends on 17)

The light emitting device according to claim 17,
wherein the light emitting element has an element width in the second direction,
wherein the first portion width is smaller than or equal to the element width of the light emitting element in the second direction, and
wherein the second portion width is larger than the element width of the light emitting element in the second direction.

### Claim 19 (depends on 17)

The light emitting device according to claim 17,
wherein the second electrically conductive material has
a second narrow portion having a third end connected to the second electrode and a fourth end opposite to the third end in the first direction and
a second wide portion electrically connected to the fourth end of the second narrow portion such that the second wide portion does not overlap with the light emitting element when viewed in the height direction, the second narrow portion having a third portion width in the second direction, the second wide portion having a fourth portion width larger than the third portion width in the second direction, and
wherein the second electrode is opposite to the first electrode in the first direction.

### Claim 20 (depends on 17)

The light emitting device according to claim 17,
wherein the second electrically conductive material has
a second narrow portion having a third end connected to the second electrode and a fourth end opposite to the third end in the first direction and
a second wide portion electrically connected to the fourth end of the second narrow portion such that the second wide portion does not overlap with the light emitting element when viewed in the height direction, the second narrow portion having a third portion width in the second direction, the second wide portion having a fourth portion width larger than the third portion width in the second direction, and
wherein the second electrode is opposite to the first electrode in the second direction.

### Claim 21 (depends on 12)

The light emitting device according to claim 12,
wherein the insulating member has a rectangular shape having four corners, and
wherein neither the first electrically conductive material nor the second electrically conductive material overlaps with the insulating member at the four corners.

### Claim 22 (depends on 12)

The light emitting device according to claim 12,
wherein the light emitting element has
a second face opposite to the first face in a height direction along a height of the light emitting device and
a lateral face connecting the first face and the second face,
wherein the wavelength converting member covers the second face and the lateral face,
wherein the insulating member overlaps with entirety of the light emitting element as viewed in the height direction.