CN101630712A - LED electrode structure - Google Patents
LED electrode structure Download PDFInfo
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- CN101630712A CN101630712A CN200910041743A CN200910041743A CN101630712A CN 101630712 A CN101630712 A CN 101630712A CN 200910041743 A CN200910041743 A CN 200910041743A CN 200910041743 A CN200910041743 A CN 200910041743A CN 101630712 A CN101630712 A CN 101630712A
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Abstract
The invention discloses an LED electrode structure, comprising a first electrode and a second electrode, wherein, the first electrode comprises at least two first ring finger parts, at least one first connection part and at least one first contact part; each first ring finger part is connected with the first connection part; the first contact part is arranged on the first ring finger part; the second electrode comprises at least two second ring finger parts, at least one second connection part and at least one second contact part; each second ring finger part is connected with the second connection part; the second contact part is inserted in the corner of the second connection part; the second electrode surrounds the first electrode in a closed manner and certain space exists between each part of the first electrode and the corresponding part of the second electrode. The LED electrode structure enables the distribution of the current of the light-emitting components and heating to be more uniform.
Description
Technical field
The present invention relates to field of semiconductor devices, specifically disclose a kind of LED electrode structure.
Background technology
In recent years, III group nitride material and device become focus, the especially iii-nitride light emitting devices (LED) of people's research.Through constantly studying and develop, at present, be that the technology of substrate growing nitride has been tending towards mature and stable with the sapphire, the Si substrate as the technology of novel backing material growing nitride also in exploitation progressively.As the light-emitting diode of one of solid-state light emitting element, its primary structure comprises a p type semiconductor layer and a n type semiconductor layer and a marginal luminescent layer.When injection current puts on second contact layer that first contact layer that first electrode comprised and second electrode comprised, hole and the electronics in the n type semiconductor layer in the p type semiconductor layer inject luminescent layer respectively, after luminescent layer is compound, emit light, from this luminescent layer outgoing.For the conventional nitride light-emitting diode, because P type nitride has lower conductivity and makes electric current transverse conductance performance within it far below the vertical conduction performance, thereby cause electric current after contact portion is injected, can't effectively be uniformly distributed into the luminescent layer of light-emitting diode, only can be distributed in the effective area that is positioned at this P type nitride semiconductor layer of P type contact electrode below, and can not lateral distribution to whole P type nitride semiconductor layer.This causes the current expansion of whole light-emitting component inhomogeneous, thereby makes that its luminosity is inhomogeneous.And for the conventional nitride light-emitting diode, the path of its first electrode to the second electrode is not to be equidistant yet, and this also is to cause one of uneven reason of current expansion.In addition, CURRENT DISTRIBUTION is inhomogeneous, causes its heating uneven, and the local performance of device is damaged easily, makes that the reliability of light-emitting component is not good.
Therefore, how improving light-emitting diode electric current uniformity extending transversely, and how rational deployment first electrode and second electrode, become now problem that must solve in the light-emitting diode field, equally also is problem to be solved by this invention.
Summary of the invention
At the shortcoming of prior art, the purpose of this invention is to provide a kind of CURRENT DISTRIBUTION evenly, the uniform LED electrode structure of heating.
For achieving the above object, technical scheme of the present invention is: a kind of LED electrode structure, it comprises: first electrode, this first electrode comprises at least two first fourth finger parts, at least one the first pontes and at least one first contact portion, each first fourth finger part links to each other with the first pontes, and first contact portion is located on first fourth finger part;
And second electrode, this second electrode comprises at least two second fourth finger parts, at least one second coupling part and at least one second contact portion, each second fourth finger part links to each other with second coupling part, and second contact portion is inserted in the corner of second coupling part;
Second electrode is closed around first electrode, and has a determining deviation between each part of first electrode and the second electrode counterpart.
Described first fourth finger part and second fourth finger partly be donut or etc. the radius annulus.
Described first fourth finger part constitutes a bending " king " word structure with the first pontes, perhaps becomes one diastrophic " M " shape structure, perhaps becomes the geometry of " halberd ".
Described first fourth finger part and the first pontes and second fourth finger part and second coupling part are mutually IPN and pitch structure and have a determining deviation.
Described second fourth finger part constitutes a cup-like structure with second coupling part.
Described first contact portion is inserted in the junction of the first pontes and first fourth finger part or other any positions on first fourth finger part; Second contact portion be inserted in second coupling part four turnings any one or a plurality of.
First contact portion and second contact portion be shaped as circle, rectangle, ellipse or square.
Described first, second electrode is integrally-built laterally, vertically all divided equally and be many five equilibriums, and the radius value of the length value of each five equilibrium and second fourth finger part is suitable.
First fourth finger part partly is two donuts with second fourth finger, the first pontes is " ten " word structure, the center of circle of this first fourth finger part and second fourth finger part is on the transverse end of the first pontes, and this first fourth finger part radius length is the twice of the second fourth finger part radius length.
The quantity of this first fourth finger part has a plurality of, and its radius length varies in size, and the quantity of this second fourth finger part also has a plurality of, and its radius length also varies in size.
Compared with prior art, the present invention has following advantage:
This LED structure is mainly used in improves the even expansion that electric current is expanded at the chip light emitting plane current among the LED.The present invention can improve the current distribution characteristic of this light-emitting component by rational electrode structural designs, thereby improves the uniformity of the luminosity of light-emitting component.
Description of drawings
Fig. 1 a is the schematic diagram of the specific embodiment one of first kind of LED electrode structure provided by the invention;
Fig. 1 b is the schematic diagram that the specific embodiment one of first kind of LED electrode structure provided by the invention is evenly divided;
Fig. 2 is the schematic diagram of the specific embodiment two of second kind of LED electrode structure provided by the invention;
Fig. 3 is the schematic diagram of the specific embodiment three of the third LED electrode structure provided by the invention;
Fig. 4 is the routine schematic diagram of a variation of the specific embodiment three of the third LED electrode structure provided by the invention;
Fig. 5 is another variation illustration intention of the specific embodiment three of the third LED electrode structure provided by the invention;
Fig. 6 is the schematic diagram of the specific embodiment four of the 4th kind of LED electrode structure provided by the invention;
Fig. 7 is a variation illustration intention of the specific embodiment four of the 4th kind of LED electrode structure provided by the invention;
Fig. 8 is another variation illustration intention of the specific embodiment four of the 4th kind of LED electrode structure provided by the invention;
Symbol description among the figure:
110 210a 210b 310a 310b, 410 first fourth finger parts;
120 220 320a 320b 320c, 420 the first pontes;
130 230 330 430 first contact portions;
140 240a 240b, 340 440a 440b, second fourth finger part or interpolation part;
260 360 460 second contact portions.
Embodiment
Now just describe embodiments of the invention with reference to the accompanying drawings in detail.Be noted that to the invention is not restricted to these embodiment, also can be widely used in other embodiment, and the scope of application of the present invention do not limited, except that can be used for light-emitting diode, also be can be used for other semiconductor components and devices.
Embodiment 1
Fig. 1 a is the schematic diagram of the specific embodiment one of first kind of LED electrode structure provided by the invention.First electrode comprises four and has the first fourth finger part 110 of same radius, the first pontes 120 that is " ten " word shape and at least one first contact portion 130 that connects these four first fourth finger parts 110, and this three part constitutes first electrode of one one-tenth bending " king " word.Wherein first contact portion 130 can be inserted in the junction of the first pontes 120 and the first fourth finger part 110, also can be inserted in other any positions on first fourth finger 110.In the present embodiment, first contact portion 130 of two circles is inserted in the junction of the first pontes 120 and the first fourth finger part 110 respectively, and forms metal contact pad.What must emphasize is that the shape of first contact portion 130 in the present embodiment is not only to be confined to circle, can be geometric figures such as ellipse, rectangle yet.
Second electrode comprises two and has the second fourth finger part 140 of same radius, two the second coupling part 150a and at least one second contact portions 160 that connect the second fourth finger part 140 and the second coupling part 150b.Wherein second contact portion 160 is inserted in the corner of 150b periphery, second coupling part.In the present embodiment, and the second fourth finger part 140 and the second coupling part 150a constitute the geometric figure of one " wineglass " shape.This cup-shaped edge arm can also can be linearity circlewise.Four four corners that become geometric second contact portion of quadrant to be inserted in 150b periphery, second coupling part respectively, and form metal contact pad, it must be four that second contact portion need not, and can be one to four.What must emphasize is that the shape of second contact portion 160 in the present embodiment is not only to be confined to quadrant shape, can be geometric figures such as ellipse, rectangle yet.
And the first fourth finger part 110 and the second fourth finger part 140 are two donuts, and the center of circle refers to transverse end " ten " of the first pontes 120, and 110 radius length is the twice of 140 radius length.The second fourth finger part, 140 finger tips equate apart from the distance of the first pontes 130, and are the radius value of the second fourth finger part 140.Simultaneously, the length of the second coupling part 150a that is connected with the second coupling part 150b with the second fourth finger part 140 also is the radius value of the second fourth finger part 140.Like this, shown in Fig. 1 b, it is six five equilibriums that light-emitting diode is laterally vertically all divided equally, and the length value of its six five equilibrium is the radius value of second fourth finger 140.Like this, the distance of the counterpart of first electrode and second electrode is roughly the same, can make two interelectrode current paths approximate identical like this, to reach the evenly purpose of expansion of electric current.For present embodiment, if consider from the angle that lead-in wire is in the light, first contact portion 130 is inserted in the junction of the first pontes 120 and the first fourth finger part 110, may cause being in the light to a certain degree, therefore consider this point, first contact portion 130 can be inserted in the first fourth finger part, 110 finger tips or fourth finger middle part.
Embodiment 2
Fig. 2 is the schematic diagram of the specific embodiment two of first kind of LED electrode structure provided by the invention.First electrode comprises the first fourth finger part 210a and 210b, the first pontes 220 and at least one first contact portion 230 that is connected the first fourth finger part 210a, 210b, and same formation one distortion of this three part is bent into first electrode of " king " word in the form of a ring.In this specific embodiment, first contact portion 230 of two circles is positioned at the finger tip part of the first fourth finger part 210a, and forms metal contact pad.What must emphasize is that the shape of first contact portion 230 in the present embodiment is not only to be confined to circle, can be geometric figures such as ellipse, rectangle yet.
Second electrode comprises second fourth finger part 240a of two different radiis and second coupling part 250 and at least one second contact portion 260 that 240b, connects the second fourth finger part 240.Wherein second contact portion 260 is inserted in the corner of second coupling part 250.In the present embodiment, two corners that become geometric second contact portions of quadrant to be inserted in second coupling part respectively, and form metal contact pad, and second contact portion to need not must be two, can be one to four.What must emphasize is that the shape of second contact portion 260 in the present embodiment is not only to be confined to quadrant shape, can be geometric figures such as ellipse, rectangle yet.
In the present embodiment, the first fourth finger part 210a and the second fourth finger part 240a can be donut, and the radius of the second fourth finger part 240a is the twice of 210a, the second fourth finger part 210b and the second fourth finger part 240b for etc. the radius annulus.But what must emphasize is, the first fourth finger part 210a, 210b and the second fourth finger part 240a, 240b such as also can be at the radius annulus.The length of first fourth finger part and second fourth finger part not only be confined to embodiment two given concrete numerical value.And first fourth finger part is also unrestricted with the fourth finger quantity of second fourth finger part, as long as both numbers are complementary.
Embodiment 2 is that with the difference of embodiment 1 maximum both second electrodes have different shaped design.
Embodiment 3
Fig. 3 is the schematic diagram of the specific embodiment three of the third LED electrode structure provided by the invention.First electrode comprises the first fourth finger part 310a and 310b, the first pontes 320a, the 320b that are connected the first fourth finger part 310a, 310b and 320c and at least one first contact portion 330, and this three part constitutes a distortion first electrode of crooked " M " in the form of a ring.In this specific embodiment, first contact portion 330 of two circles is positioned at the fourth finger middle part of the first fourth finger part 310a, and forms metal contact pad.What must emphasize is that the shape of first contact portion 230 in the present embodiment is not only to be confined to circle, can be geometric figures such as ellipse, rectangle yet.
Second electrode comprises the second fourth finger part 340, connects the second coupling part 350a, 350b and at least one second contact portion 360 of the second fourth finger part 340.Wherein second contact portion 360 is inserted in the corner of the second coupling part 350b.This three part constitutes one " cup " shape figure.In the present embodiment, two corners that become geometric second contact portions of quadrant to be inserted in second coupling part respectively, and form metal contact pad, and second contact portion to need not must be two, can be one to four.What must emphasize is that the shape of second contact portion 260 in the present embodiment is not only to be confined to quadrant shape, can be geometric figures such as ellipse, rectangle yet.
In the present embodiment, the first fourth finger part 310a and the second fourth finger part 340 for etc. the radius annulus, the center of circle lays respectively at the finger tip of the first pontes 350a, the first fourth finger part 310b and the second fourth finger part 340 are donut, the center of circle is positioned at the finger tip part of 320c, and the ring radius of the first fourth finger part 310b is the twice of the second fourth finger part, 340 ring radiuses.The first pontes 320a, 320c and the second coupling part 350a are arranged side by side and interspersed, and six five equilibriums are divided entire chip equally, and the first pontes 320b and the second coupling part 350b are arranged side by side and intert quartering chip.
Fig. 4 is a variation illustration intention of the specific embodiment three of the third LED electrode structure provided by the invention.Wherein removed the first pontes 320c in the above-mentioned specific embodiment.
Fig. 5 is another variation illustration intention of the specific embodiment three of the third LED electrode structure provided by the invention.Wherein removed the first pontes 320c in the above-mentioned specific embodiment, and with the part circulus of the first fourth finger 310a stretching be finger.
Embodiment 4
Fig. 6 is the schematic diagram of the specific embodiment four of the 4th kind of LED electrode structure provided by the invention.First electrode comprises: contain the first fourth finger part 410 of four fourth fingers, the first pontes 420 that is " ten " word shape and at least one first contact portion 430 that connects these four first fourth finger parts 410, this three part constitutes first electrode that is bending " halberd " type.Wherein first contact portion 430 can be inserted in the junction of the first pontes 420 and the first fourth finger part 410, also can be inserted in other any positions on first fourth finger 410.In the present embodiment, first contact portion 430 of two circles is inserted in the junction of the first pontes 420 and the first fourth finger part 410 respectively, and forms metal contact pad.What must emphasize is that the shape of first contact portion 430 in the present embodiment is not only to be confined to circle, can be geometric figures such as ellipse, rectangle yet.
Second electrode only comprises second coupling part 450 and at least one second contact portion 460.Wherein second contact portion 460 is inserted in the corner of second coupling part 450.In the present embodiment, two four corners that become geometric second contact portion of quadrant to be inserted in second coupling part 450 respectively, and form metal contact pad, it must be two that second contact portion need not, and can be one to four.What must emphasize is that the shape of second contact portion 460 in the present embodiment is not only to be confined to quadrant shape, can be geometric figures such as ellipse, rectangle yet.
And four fourth fingers of the first fourth finger part 410 are one group with two, become two groups of donuts.For present embodiment, if consider from the angle that lead-in wire is in the light, first contact portion 130 is inserted in the junction of the first pontes 120 and the first fourth finger part 110, may cause being in the light to a certain degree, therefore consider this point, first contact portion 130 can be inserted in the first fourth finger part, 110 finger tips or fourth finger middle part.
Fig. 7 is a variation illustration intention of the specific embodiment four of the 4th kind of LED electrode structure provided by the invention.Wherein between first fourth finger 410 and the first pontes 420, insert the second slotting finger and divided 440a.
Fig. 8 is another variation illustration intention of the specific embodiment four of the 4th kind of LED electrode structure provided by the invention.Wherein between first fourth finger 410 and the first pontes 420, inserted the first fourth finger part 440b.
Inserting 440a and 440b in Fig. 7, Fig. 8, is in order to reach the purpose that electric current is evenly expanded between first electrode and second electrode equally.
Claims (10)
1, a kind of LED electrode structure, it is characterized in that comprising: first electrode, this first electrode comprises at least two first fourth finger parts, at least one the first pontes and at least one first contact portion, each first fourth finger part links to each other with the first pontes, and first contact portion is located on first fourth finger part;
And second electrode, this second electrode comprises at least two second fourth finger parts, at least one second coupling part and at least one second contact portion, each second fourth finger part links to each other with second coupling part, and second contact portion is inserted in the corner of second coupling part;
Second electrode is closed around first electrode, and has a determining deviation between each part of first electrode and the second electrode counterpart.
2, LED electrode structure according to claim 1 is characterized in that: described first fourth finger part and second fourth finger partly for donut or etc. the radius annulus.
3, LED electrode structure according to claim 2 is characterized in that: described first fourth finger part constitutes a bending " king " word structure with the first pontes, perhaps becomes one diastrophic " M " shape structure, perhaps becomes the geometry of " halberd ".
4, LED electrode structure according to claim 1 is characterized in that: described first fourth finger part and the first pontes and second fourth finger part and second coupling part are mutually IPN and pitch structure and have a determining deviation.
5, LED electrode structure according to claim 1 is characterized in that: described second fourth finger part constitutes a cup-like structure with second coupling part.
6, according to each described LED electrode structure of claim 1 to 5, it is characterized in that: described first contact portion is inserted in the junction of the first pontes and first fourth finger part or other any positions on first fourth finger part; Second contact portion be inserted in second coupling part four turnings any one or a plurality of.
7, LED electrode structure according to claim 6 is characterized in that: first contact portion and second contact portion be shaped as circle, rectangle, ellipse or square.
8, LED electrode structure according to claim 1 is characterized in that: described first, second electrode is integrally-built laterally, vertically all divided equally and be many five equilibriums, and the radius value of the length value of each five equilibrium and second fourth finger part is suitable.
9, LED electrode structure according to claim 1, it is characterized in that: first fourth finger part partly is two donuts with second fourth finger, the first pontes is " ten " word structure, the center of circle of this first fourth finger part and second fourth finger part is on the transverse end of the first pontes, and this first fourth finger part radius length is the twice of the second fourth finger part radius length.
10, LED electrode structure according to claim 1 is characterized in that: the quantity of this first fourth finger part has a plurality of, and its radius length varies in size, and the quantity of this second fourth finger part also has a plurality of, and its radius length also varies in size.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910041743A CN101630712A (en) | 2009-08-07 | 2009-08-07 | LED electrode structure |
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| CN200910041743A CN101630712A (en) | 2009-08-07 | 2009-08-07 | LED electrode structure |
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| CN101630712A true CN101630712A (en) | 2010-01-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102800776A (en) * | 2012-05-29 | 2012-11-28 | 中山大学 | Snowflake-shaped LED (Light-Emitting Diode) electrode structure |
| CN105140369A (en) * | 2011-06-13 | 2015-12-09 | 新世纪光电股份有限公司 | Light emitting diode structure |
| CN110931612A (en) * | 2019-11-20 | 2020-03-27 | 华南师范大学 | Visible light communication light-emitting device with multi-ring square unit structure and preparation method thereof |
| CN113692081A (en) * | 2016-06-14 | 2021-11-23 | 三星显示有限公司 | Pixel structure |
-
2009
- 2009-08-07 CN CN200910041743A patent/CN101630712A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105140369A (en) * | 2011-06-13 | 2015-12-09 | 新世纪光电股份有限公司 | Light emitting diode structure |
| CN105140369B (en) * | 2011-06-13 | 2019-07-02 | 新世纪光电股份有限公司 | Light emitting diode structure |
| CN102800776A (en) * | 2012-05-29 | 2012-11-28 | 中山大学 | Snowflake-shaped LED (Light-Emitting Diode) electrode structure |
| CN113692081A (en) * | 2016-06-14 | 2021-11-23 | 三星显示有限公司 | Pixel structure |
| CN110931612A (en) * | 2019-11-20 | 2020-03-27 | 华南师范大学 | Visible light communication light-emitting device with multi-ring square unit structure and preparation method thereof |
| CN110931612B (en) * | 2019-11-20 | 2021-06-22 | 华南师范大学 | Visible light communication light-emitting device with multi-ring square unit structure and preparation method thereof |
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Application publication date: 20100120 |