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Optical semiconductor device, socket, and optical semiconductor unit

Inactive Publication Date: 2010-09-16
JAPAN AVIATION ELECTRONICS IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]In view of the above-mentioned problems, it is an object of the present invention to provide an optical semiconductor device which is easily replaceable and which has an electrode portion of a structure capable of efficiently transferring heat generated therein without increasing the size of the device.
[0014]According to the present invention, the electrode portion has a block shape in external appearance. With this structure, heat generated in the optical semiconductor device is transferred through an electrode to a substrate to cool the optical semiconductor device. Therefore, it is possible to provide an optical semiconductor device which is easily replaceable and which has an electrode portion of a structure capable of efficiently transferring heat generated in the optical semiconductor device without increasing the size of the device.

Problems solved by technology

However, if the LED device increased in luminance has a small-sized and replaceable connector-type structure as disclosed in Patent Documents 1 and 2, it is not possible to sufficiently cool the heat generated from the LED device.
Accordingly, there is a problem that the temperature of the LED device itself is increased to cause deterioration of the LED device itself.
On the other hand, in the structure in which the entire substrate including the LED device is brought into contact with the heat sink to dissipate or radiate heat as in Patent Document 3, there is a problem that the device is increased in size.
Further, there is another problem that replacement is troublesome because the substrate is fixed to each socket by screws.

Method used

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  • Optical semiconductor device, socket, and optical semiconductor unit
  • Optical semiconductor device, socket, and optical semiconductor unit
  • Optical semiconductor device, socket, and optical semiconductor unit

Examples

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example 1

[0115]According to the design method using the finite element method described in the first embodiment, volumes of the main body 7 and the electrode portions 13a and 13b of the LED device 3 were calculated so as to optimize the thermal property data.

[0116]The LED 9 had a size of 1 mm square and a height of 0.1 mm. A thermal conductivity of the LED 9 and an input power supplied to the LED 9 were 42 W / mK and 1 W (at a room temperature), respectively.

[0117]A junction temperature of the LED 9 was 200° C. and the substrate 6a was a glass-epoxy substrate (FR-4) having a size of 50 mm square and a thickness of 0.8 mm.

[0118]As a material of the main body 7, Al2O3 (having a thermal conductivity of 18 W / mK) was used. As a material of the electrode portions 13a and 13b, oxygen-free copper (having a thermal conductivity of 390 W / mK) was used. Then, a relationship between a volume of the main body 7 and a temperature of the LED 9 and a relationship between a volume of the electrode portions 13a ...

example 2

[0122]According to the design method using the finite element method described in the first embodiment, comparison was made between junction temperatures of the LED 9 when the socket 5 according to the first embodiment was used and when the socket 5a according to the fourth embodiment was used.

[0123]Specifically, each of the eleven socket terminals 19a and the eleven socket terminals 19b of the socket 5 had a width of 0.2 mm and these socket terminals were disposed at a distance of 0.2 mm from one another. On the other hand, each of the four socket terminals 43a and the four socket terminals 43b of the socket 5a had a width of 0.91 mm and these socket terminals were disposed at a distance of 0.2 mm from one another. For all of those socket terminals, a contact length in a direction perpendicular to a width direction of each socket terminal was 0.92 mm.

[0124]As a material of the socket terminal, phosphor bronze (having a thermal conductivity of 63 W / mK) and a copper alloy (having a t...

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Abstract

An optical semiconductor unit of the present invention has an LED device provided with an LED (Light Emitting Diode) and a socket to which the LED device is mounted, the LED device has a main body to which the LED is mounted, the main body has a first surface to which block-shaped electrode portions are connected.

Description

[0001]This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2009-058463, filed on Mar. 11, 2009, the disclosure of which is incorporated herein in its entirety by reference.BACKGROUND OF THE INVENTION[0002]This invention relates to an optical semiconductor device, a socket for mounting the optical semiconductor device thereto, and an optical semiconductor unit.[0003]Formerly, an LED (Light Emitting Diode) device as a typical optical semiconductor device was fixed to a substrate by soldering and used.[0004]However, if the LED device is fixed to the substrate, replacement of the LED device is difficult and troublesome. In view of the above, an LED device of a replaceable connector type has been proposed as disclosed in JP-A-2001-24216 (Patent Document 1) and JP-A-2008-288221 (Patent Document 2).[0005]It is said that the LED device generates less heat as compared to a common light source using a filament or the like. However, in recent y...

Claims

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Application Information

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IPC IPC(8): H01L33/62G06F17/50
CPCH01R13/20H05K3/301H05K2201/10106G06F17/5072H01R12/716H01R12/7076H05K2201/10325G06F30/392
Inventor KANNO, HIDEYUKI
Owner JAPAN AVIATION ELECTRONICS IND LTD
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