Light emitting diode, optical semiconductor device, epoxy resin composition suited for optical semiconductor device, and method for manufacturing the same
First Claim
1. A light emitting diode comprising an LED chip having a light emitting layer made of a nitride compound semiconductor and a light transmitting resin that includes a fluorescent material which absorbs at least a part of light emitted by said LED chip and emits light of a different wavelength, wherein said fluorescent material includes a fluorescent particles of small particle size and a fluorescent particles of large particle size, said fluorescent particles of large particle size being distributed in the vicinity of said LED chip in said light transmitting resin to form a wavelength converting layer, said fluorescent particles of small particle size being distributed on the outside of said wavelength converting layer in the light transmitting resin.
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Abstract
A light emitting diode comprising an LED chip having a light emitting layer made of a nitride compound semiconductor and a light transmitting resin that includes a fluorescent material which absorbs at least a part of light emitted by the LED chip and emits light of a different wavelength, wherein the fluorescent material includes a fluorescent particles of small particle size and a fluorescent particles of large particle size, the fluorescent particles of large particle size being distributed in the vicinity of the LED chip in the light transmitting resin to form a wavelength converting layer, the fluorescent particles of small particle size being distributed on the outside of the wavelength converting layer in the light transmitting resin.
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Citations
18 Claims
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1. A light emitting diode comprising an LED chip having a light emitting layer made of a nitride compound semiconductor and a light transmitting resin that includes a fluorescent material which absorbs at least a part of light emitted by said LED chip and emits light of a different wavelength,
wherein said fluorescent material includes a fluorescent particles of small particle size and a fluorescent particles of large particle size, said fluorescent particles of large particle size being distributed in the vicinity of said LED chip in said light transmitting resin to form a wavelength converting layer, said fluorescent particles of small particle size being distributed on the outside of said wavelength converting layer in the light transmitting resin.
- 5. A light emitting diode comprising a LED chip made of a nitride semiconductor and a light transmitting resin having a fluorescent material which absorbs at least a part of light emitted by said LED chip and emits light of a different wavelength, wherein said fluorescent material is characterized by a volume-based particle size distribution curve that is flat in a region of cumulative percentage from 0.01 to 10 vol %.
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11. A light emitting diode comprising;
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a package having a metal base consisting of a pair of thin metal sheets that constitute positive and negative electrodes being joined via a resin insulator for electrical isolation from each other and a side wall bonded to the circumference of said metal base on one side thereof thereby forming a mounting area, an LED chip mounted in said mounting area and, a light transmitting resin that fills the mounting area so as to seal the LED chip, wherein said light transmitting resin is formed continuously from said mounting area over the top of said side wall and the top surface of said light transmitting resin is flat and substantially parallel to said metal base and the side face on the circumference of the light transmitting resin is substantially flush with the circumferential side face of the package. - View Dependent Claims (12, 13, 14)
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15. A method for producing a light emitting diode comprising comprising a package having a metal base consisting of a pair of thin metal sheets that constitute positive and negative electrodes being joined via a resin insulator for electrical isolation from each other and a side wall bonded to the circumference of said metal base on one side thereof thereby forming a mounting area, an LED chip mounted in said mounting area and a light transmitting resin that fills the mounting area so as to seal the LED chip,
wherein said light transmitting resin is formed continuously from said mounting area over the top of said side wall and the top surface of said light transmitting resin is flat and substantially parallel to said metal base and the side face on the circumference of the light transmitting resin is substantially flush with the circumferential side face of the package, the method comprising: -
a first step of making a package assembly consisting of a plurality of packages by bonding an insulating substrate having a plurality of through holes that are grouped corresponding to said mounting areas and a metal base plate having portions separated by the resin insulator in correspondence to the through holes, a second step of mounting the LED chip in said mounting area of each package formed with the through hole, a third step of applying and curing the light transmitting resin on the top surface of the insulating substrate and in the through holes by mimeograph printing by using a mask that has an aperture in correspondence to each group, and a fourth step of dividing the package assembly having the light transmitting resin applied thereon into individual packages. - View Dependent Claims (16, 17)
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18-33. -33. (canceled)
Specification