Semiconductor light emitting devices
A semiconductor light emitting device may include a semiconductor light emitting diode (LED) chip, a light-transmitting film on the LED chip, and a light-transmitting bonding layer between the light-transmitting film and the semiconductor LED chip. At least one of the light-transmitting film and the light-transmitting bonding layer may include a wavelength conversion material configured to convert light emitted by the semiconductor LED chip into light having a wavelength different from a wavelength of the emitted light. The light-transmitting bonding layer may have a lateral inclined region extending to the lateral surface to form an inclined surface. The semiconductor light emitting device may further include a reflective packaging portion surrounding the light-transmitting bonding layer, covering the first surface such that an electrode of the LED chip is at least partially exposed. The reflective packaging portion may include a reflective material.
1. A semiconductor light emitting device, comprising:
a semiconductor light emitting diode (LED) chip having a first surface, an electrode on the first surface, a second surface opposing the first surface, and a lateral surface between the first surface and the second surface, the second surface being an upper surface of the semiconductor LED chip, the lateral surface being an outer side surface of the semiconductor LED chip;
a light-transmitting film on the second surface of the semiconductor LED chip;
a light-transmitting bonding layer between the light-transmitting film and the semiconductor LED chip, the light-transmitting bonding layer configured to bond the light-transmitting film to the semiconductor LED chip, the light-transmitting bonding layer including a bonding region covering an entirety of the second surface of the semiconductor LED chip and an extending region extending from the bonding region and at least partially covering the lateral surface of the semiconductor LED chip to form an inclined surface; and
a reflective packaging portion surrounding the light-transmitting bonding layer, the reflective packaging portion covering the first surface of the semiconductor LED chip such that the electrode is at least partially exposed from the reflective packaging portion, the reflective packaging portion including a reflective material,
wherein the light-transmitting film includes a first wavelength conversion material that is configured to convert light emitted by the semiconductor LED chip into light having a first wavelength different from a wavelength of the emitted light,
wherein the light-transmitting bonding layer includes a second wavelength conversion material that is configured to convert light emitted by the semiconductor LED chip into light having a second wavelength different from a wavelength of the emitted light,
wherein at least both the bonding region and the extending region of the light-transmitting bonding layer includes the second wavelength conversion material,
wherein the second wavelength is longer than the first wavelength.
2. The semiconductor light emitting device of claim 1 , wherein the inclined surface of the extending region includes a concave portion or a convex portion.
3. The semiconductor light emitting device of claim 1 , wherein the reflective packaging portion includes a lateral surface that is substantially coplanar with a lateral surface of the light-transmitting film.
4. The semiconductor light emitting device of claim 1 , wherein,
the first wavelength conversion material includes at least one of a yellow phosphor and a green phosphor, and
the second wavelength conversion material includes a red phosphor.
5. The semiconductor light emitting device of claim 1 , wherein the light-transmitting bonding layer includes a light dispersion material.
6. The semiconductor light emitting device of claim 1 , wherein the light-transmitting bonding layer includes a thixotropic agent.
7. The semiconductor light emitting device of claim 1 , wherein the light-transmitting film is a wavelength conversion film that includes the wavelength conversion material.
8. The semiconductor light emitting device of claim 1 , further comprising:
a conductive bump on the electrode.
9. The semiconductor light emitting device of claim 8 , wherein the reflective packaging portion includes at least one surface that is substantially coplanar with a surface of the conductive bump.
10. A semiconductor light emitting device, comprising:
a semiconductor light emitting diode (LED) chip, the semiconductor LED chip including a first surface, a second surface opposing the first surface, and a lateral surface between the first surface and the second surface, the second surface being an upper surface of the semiconductor LED chip, the lateral surface being an outer side surface of the semiconductor LED chip;
a light-transmitting film on the semiconductor LED chip; and
a light-transmitting bonding layer between the light-transmitting film and the semiconductor LED chip, the light-transmitting bonding layer including a bonding region covering an entirety of the second surface of the semiconductor LED chip and an extending region extending from the bonding region and at least partially covering the lateral surface of the semiconductor LED chip to form an inclined surface;
wherein the light-transmitting film includes a first wavelength conversion material that is configured to convert light emitted by the semiconductor LED chip into light having a first wavelength different from a wavelength of the emitted light,
wherein the light-transmitting bonding layer includes a second wavelength conversion material that is configured to convert light emitted by the semiconductor LED chip into light having a second wavelength different from a wavelength of the emitted light,
wherein at least both the bonding region and the extending region of the light-transmitting bonding layer includes the second wavelength conversion material,
wherein the second wavelength is longer than the first wavelength.
11. The semiconductor light emitting device of claim 10 , wherein,
the semiconductor light emitting diode (LED) chip includes an electrode on the first surface; and
the semiconductor light emitting device further includes a reflective packaging portion surrounding the light-transmitting bonding layer, the reflective packaging portion partially covering the first surface of the semiconductor LED chip such that the electrode is at least partially exposed from the reflective packaging portion, the reflective packaging portion including a reflective material.
12. The semiconductor light emitting device of claim 10 , wherein,
the first wavelength conversion material includes at least one of a yellow phosphor and a green phosphor; and
the second wavelength conversion material includes a red phosphor.
13. A semiconductor light emitting device, comprising:
a semiconductor light emitting diode (LED) chip, the semiconductor LED chip including a first surface, a second surface opposing the first surface, and a lateral surface between the first surface and the second surface, the second surface being an upper surface of the semiconductor LED chip, the lateral surface being an outer side surface of the semiconductor LED chip; and
a light-transmitting bonding layer on the semiconductor LED chip, the light-transmitting bonding layer in direct contact with at least one surface of the semiconductor LED chip, the light-transmitting bonding layer including a bonding region covering an entirety of the second surface of the semiconductor LED chip and an extending region extending from the bonding region and at least partially covering the lateral surface of the semiconductor LED chip to form an inclined surface;
wherein the light-transmitting film includes a first wavelength conversion material that is configured to convert light emitted by the semiconductor LED chip into light having a first wavelength different from a wavelength of the emitted light,
wherein the light-transmitting bonding layer includes a second wavelength conversion material that is configured to convert light emitted by the semiconductor LED chip into light having a second wavelength different from a wavelength of the emitted light,
wherein both the bonding region and the extending region of the light-transmitting bonding layer includes the second wavelength conversion material,
wherein the semiconductor light emitting device further includes a light-transmitting film on the light-transmitting bonding layer,
wherein the second wavelength is longer than the first wavelength,
wherein the first wavelength conversion material includes at least one of a yellow phosphor and a green phosphor,
wherein the second wavelength conversion material includes a red phosphor.
14. The semiconductor light emitting device of claim 13 , wherein,
the semiconductor light emitting diode (LED) chip includes an electrode on the first surface; and
the semiconductor light emitting device further includes a reflective packaging portion surrounding the light-transmitting bonding layer, the reflective packaging portion partially covering the first surface of the semiconductor LED chip such that the electrode is at least partially exposed from the reflective packaging portion, the reflective packaging portion including a reflective material.