Base plate for making luminous element and luminous element made by same
A technology for light-emitting components and substrates, which is applied in the direction of electrical components, semiconductor devices, circuits, etc., and can solve the problems of affecting the total reflection effect, void defects at the top of the groove, and increasing the effective surface area of total reflection, etc.
Active Publication Date: 2010-03-03
EPISTAR CORP
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Problems solved by technology
When using patterned substrate 41 in combination with lateral epitaxial growth technology (lateral epitaxial growth) to grow epitaxial film, the lateral growth of epitaxial film 42' will often cause void defect 48 at the top of the groove.
When light reaches these macroscopic void defects, it will be scattered due to its irregular shape, thus affecting the total reflection effect, which in turn affects the external quantum efficiency of the LED
[0006] In addition, the total reflection effect caused by the structure of the patterned substrate increases with the increase of the available total reflection surface in the patterned substrate. By increasing the effective surface area of total reflection, the device efficiency will be significantly increased.
Method used
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[0027] While the invention will be described in terms of a number of preferred embodiments, other embodiments (including embodiments that do not provide all of the advantages and features set forth herein) known to those skilled in the art are also within the scope of the invention middle. Accordingly, the scope of the present invention is limited only with reference to the scope of the appended claims.
[0028] Illustrative embodiments of patterned substrates according to the present invention will now be described with reference to the accompanying drawings.
[0029] Figures 1A to 1C is an example of a patterned substrate illustrating the present invention. Figure 1A It is a perspective view of an embodiment of the patterned substrate of the present invention; Figure 1B for along Figure 1A The cross-sectional view taken on line 1B-1B' of ; Figure 1C for along Figure 1A The cross-sectional view taken on line 1C-1C'.
[0030] refer to Figure 1A , the patterned s...
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The invention relates to a base plate for making a luminous element and the luminous element made by the base plate. The base plate comprises at least one platform area and a plurality of continuous convex parts, wherein the platform areas have first crystal surface directions of extension growth; the continuous convex parts are mutually connected around the platform areas for separating one platform area from another platform area; and the crystal surface directions of the continuous convex parts approximately do not comprise the first crystal surface directions, therefore, extension mainly grows in the platform areas when the luminous element is formed, and the base plate avoids producing extension defects and enhances the outer quantum efficiency of the luminous element.
Description
technical field [0001] The present invention relates to a substrate for manufacturing a light-emitting element and a light-emitting element manufactured by using the substrate; ) LEDs. Background technique [0002] Since light emitting elements, or light emitting diodes (LEDs), have the advantages of high brightness and environmental protection, LEDs have been widely used in applications such as display backlights and lighting. However, as known to those skilled in the art, since the quantum efficiency (quantumefficiency) of light-emitting diodes is not high, the energy that cannot be converted into light is converted into heat. rise and affect the luminous efficiency of the LED. [0003] At present, it is known that during the epitaxial process of manufacturing LEDs, if the epitaxial film contains a large number of threading dislocations (dislocations), the internal quantum efficiency (internal quantum efficiency) will be affected. The internal quantum efficiency is the ...
Claims
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Inventor程志青
OwnerEPISTAR CORP