CN204577467U - The material-strap structure of lead frame - Google Patents
The material-strap structure of lead frame Download PDFInfo
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- CN204577467U CN204577467U CN201520132845.6U CN201520132845U CN204577467U CN 204577467 U CN204577467 U CN 204577467U CN 201520132845 U CN201520132845 U CN 201520132845U CN 204577467 U CN204577467 U CN 204577467U
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- lead frame
- intercell connector
- lead
- those
- intercell
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Abstract
A material-strap structure for lead frame, refers to a kind of material-strap structure of the lead frame in order to carry light-emitting diode chip for backlight unit especially.Comprise a lead frame and complex lead frame, lead frame is formed with the lead areas that plural number is adjacent one another are, and is formed with an intercell connector between those wantonly two lead areas adjacent one another are; Complex lead frame, is arranged at respectively in each lead areas, and is supported by lead frame.Wherein, each intercell connector is formed with one first reinforced structure, by the reinforced structure on those intercell connectors, to increase the intensity of monolith band structure, avoid monolith band structure to produce flexural deformation, and then improve the follow-up stability of carrying out die bond, routing and encapsulation of lead frame.
Description
Technical field
The utility model belongs to the category of lead frame, relates to a kind of material-strap structure with lead frame for carrying light-emitting diode chip for backlight unit particularly.
Background technology
In recent years, because light-emitting diode has, volume is little, brightness is high, and the advantage such as power consumption is low, has become the first-selection of 3C Product, home lighting, automobile lighting, has replaced known various bulb in large quantities.Technical at present, the driving chip of general light-emitting diode (LED) module is arranged on printed circuit board (PCB), is electrically connected by lead frame and light-emitting diode chip for backlight unit, to drive light-emitting diode.
Existing lead frame, is mainly carried on a material-strap structure, is able to by material-strap structure for follow-up, after making it carry out the subsequent techniques such as die bond, routing, encapsulation to each lead frame, then is taken off on material-strap structure by each lead frame.
But existing material-strap structure, be formed with plural lead areas on a metal material belt, each lead areas is in order to carry a lead frame, and each lead frame includes insulating body and complex conduction pin.
But along with the volume of light-emitting diode is less, the thickness of metal material belt also continues thinning, therefore, when the material-strap structure that metal material belt is formed carries more lead frames, cause the strength of the required carrying of metal material belt larger, the requirement of structural strength also promotes relatively.
Existing material-strap structure also exists and holds yielding factor, particularly material-strap structure central position, easily because the quantity of lead frame carrying is too many, and present bending phenomenon, also the flexural deformation of monolith band structure can be caused, and then stability when causing follow-up die bond, routing and encapsulate declines, and have impact on the process yields after follow-up encapsulation.
Utility model content
The purpose of this utility model is the material-strap structure providing a kind of lead frame, and it has better structural strength, and can prevent flexural deformation.
For achieving the above object, the material-strap structure of the lead frame that the utility model provides, comprise a lead frame and complex lead frame, lead frame is formed with the lead areas that plural number is adjacent one another are, and is formed with an intercell connector between those wantonly two lead areas adjacent one another are; Complex lead frame, is arranged at respectively in each lead areas, and is supported by lead frame; Wherein, each intercell connector is formed with a reinforced structure.
Wherein, reinforced structure is arranged on the central position of intercell connector, makes the section of linking bar be a U-shaped.Reinforced structure also can arrange side or two sides of intercell connector, makes the section of intercell connector generally in a L-shaped or in a ㄇ shape.Reinforced structure also can be arranged on two sides of intercell connector, and arranges in rightabout, makes the section of intercell connector generally in a ㄣ shape.
Wherein, lead frame includes two spaced drawing bands further and is located at the plural support bar of two drawing interbands, and those lead areas are that on lead frame, institute's group is every forming by two drawing bands, plural support bar and those intercell connectors, and those lead frames are supported in those lead areas by two drawing bands and those support bars.
By the reinforced structure on those intercell connectors, to increase the intensity of monolith band structure, avoid monolith band structure to produce flexural deformation, and then improve the follow-up stability of carrying out die bond, routing and encapsulation of lead frame.
Accompanying drawing explanation
Fig. 1 is the floor map of the utility model material-strap structure first embodiment.
Fig. 2 is the partial cutaway schematic view that the utility model intercell connector first implements aspect.
Fig. 3 is the partial cutaway schematic view that the utility model intercell connector second implements aspect.
Fig. 4 is the partial cutaway schematic view that the utility model intercell connector the 3rd implements aspect.
Fig. 5 is the partial cutaway schematic view that the utility model intercell connector the 4th implements aspect.
Fig. 6 is the partial cutaway schematic view that the utility model intercell connector the 5th implements aspect.
Fig. 7 is the partial cutaway schematic view that the utility model intercell connector the 6th implements aspect.
Fig. 8 is the floor map of this practical utility model material-strap structure second embodiment.
Fig. 9 is the floor map of the utility model material-strap structure the 3rd embodiment.
Symbol description in accompanying drawing
10,10 ', 10 " material-strap structure; 20,20 ', 20 " lead frame; 21 lead areas; 22 intercell connectors; 221,221 ', 222,223,224,225,226,227 reinforced structures; 23,23 ' drawing band; 24,24 ' support bar; 25 frames; 30 lead frames; 31 functional areas; 32 electrodes; 33 conductive connecting pins.
Embodiment
Refer to shown in Fig. 1 and Fig. 2, be respectively the generalized section of the floor map of the utility model material-strap structure first embodiment and the first enforcement aspect of intercell connector.As shown in Figures 1 and 2, material-strap structure 10 of the present utility model, it has a lead frame 20 and complex lead frame 30.
Lead frame 20 having plural lead areas 21, is on lead frame 20, arrange two lead areas 21 for its main embodiment in the present embodiment.As shown in Figure 1, two lead areas 21 are adjacent one another are, and be formed with an intercell connector 22 between two lead areas 21, two ends of intercell connector 22 are connected on lead frame 20, each lead areas 21 is made to form an independently region, and in each lead areas 21, being provided with a lead frame 30, each lead frame 30 supported by lead frame 20.
Each lead frame 30 central authorities is formed with functional areas 31, at least two electrodes 32 are formed in functional areas 31, its light-emitting diode chip for backlight unit (not showing in icon) is made to carry out the subsequent techniques such as die bond, routing and encapsulation in these functional areas 31, and each electrode 32 extends to lead frame 30 outside formation conductive connecting pin 33 respectively, and then after being able to connect positive and negative electrode by this conductive connecting pin 33, and then light-emitting diode chip for backlight unit is driven in functional areas 31, and produce light.
Wherein, two ends of intercell connector 22 are connected on lead frame 20, and intercell connector 22 is formed with further a reinforced structure 221, in this enforcement aspect, reinforced structure 221 mainly utilizes impact style, central position drawing in intercell connector 22 has a U-shaped structure, causes the section of integrated connection bar 22 to be a U-shaped.
Thus, by reinforced structure 221, be increased the structural strength of intercell connector 22, and effectively can reduce intercell connector 22 and produce diastrophic phenomenon, and then effectively increased the structural strength of monolith band structure 10, avoid monolith band structure 10 because of the undercapacity of intercell connector 22 and produce diastrophic phenomenon.
Refer to shown in Fig. 3, Fig. 4, Fig. 5, be respectively second of the utility model intercell connector and implement the partial cutaway schematic view that aspect, the 3rd implements aspect and the 4th enforcement aspect.As shown in Figure 3, implement in aspect at second of intercell connector 22, reinforced structure 222 on its intercell connector 22 is located at the wherein side of intercell connector 22, is mainly formed with a bending with impact style in ora terminalis place, intercell connector 22 side, makes the section of its intercell connector 22 generally in a J shape.
As shown in Figure 4, implement in aspect at the 3rd of intercell connector 22, reinforced structure 223 on intercell connector 22 is located at the two-phase respective side of intercell connector 22, is mainly respectively formed with a bending with impact style in the two-phase respective side of intercell connector 22, makes the section of its intercell connector 22 generally in a ㄇ shape.
As shown in Figure 5, implement in aspect at the 4th of intercell connector 22, reinforced structure 224 on intercell connector 22 is located at the two-phase respective side of intercell connector 22, and direction is contrary each other, mainly respectively be formed with a bending that direction is contrary each other with impact style in the two-phase respective side of intercell connector 22, make the section of its intercell connector 22 generally in a ㄣ shape.
As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, reinforced structure 221,222,223,224 on the utility model intercell connector 22 mainly formed with impact style, it is mainly by changing the section structure of intercell connector 22, the section structure of intercell connector 22 is presented non-planar, so can effectively promote intercell connector 22 vertical plane to holding capacity, and avoid intercell connector 22 because producing diastrophic phenomenon by vertical plane to power, and then the structural strength of monolith band structure 20 can be increased.
As shown in Figure 6, for the 5th of the utility model intercell connector implements the partial cutaway schematic view of aspect.As shown in the figure, the reinforced structure 225 on the utility model intercell connector 22 also can utilize fashion of extrusion in the both sides of intercell connector 22 further, in the both sides of intercell connector 22 difference extrusion molding, makes the section structure of its intercell connector 22 present T-shaped.
As shown in Figure 7, for the 6th of the utility model intercell connector implements the partial cutaway schematic view of aspect.As shown in the figure, reinforced structure 226 on the utility model intercell connector 22 further also can in the both sides of intercell connector 22, and be shaped to fashion of extrusion while of utilization with the upper and lower relative to intercell connector 22, and make the both sides of intercell connector 22 be formed with the configuration of mediad outer lug respectively.
As shown in FIG. 6 and 7, make intercell connector 22 of the present utility model utilize the mode of extruding to form reinforced structure 225,226, also effectively can increase the structural strength of intercell connector.
Referring to shown in Fig. 7, is the floor map of the second embodiment of the utility model material-strap structure.In second embodiment of the utility model material-strap structure 10 ', mainly be that lead frame 20 ' also includes two drawing bands 23 and plural support bar 24 further, wherein two drawing bands 23 are spaced, and those support bars 24 are equidistantly arranged between two drawing bands 23, and two ends of intercell connector 22 are connected between drawing band 23 and support bar 24, also or between two adjacent support bars 24, and then by two drawing bands 23, plural number support bar 24 and plural intercell connector 22, and plural lead areas 21 is separated out between lead frame 20 ' is upper, and each intercell connector 22 is positioned between two adjacent lead areas 21, and each intercell connector 22 is also formed with reinforced structure 221.
Then be respectively equipped with a lead frame 30 in each lead areas 21, this each lead frame 30 is by two adjacent support bars 24 or is supported by adjacent drawing band 23 and support bar 23, and is held in each lead areas 21.
In the present embodiment, lead frame 20 ' is mainly made to stretch in length and edge, direction, wide portion respectively, make its lead frame 20 ' is able to be formed with more lead areas 21 by those support bars 28 and the setting of those connecting bands 22, and then make monolith band structure 10 ' to be carried more lead frames 30.
In addition, the ora terminalis place of lead frame 20 ', the ora terminalis link position place namely between two drawing bands 27, is formed with a frame 25, its this frame 25 also can be arranged and be formed with reinforced structure 227.
Specifically, when the length of lead frame 20 ' is longer, lead frame 30 quantity of carrying is more, the weight that monolith band structure 10 ' bears is heavier, therefore, when each intercell connector 22 is formed with reinforced structure 221, and when frame being formed with reinforced structure 227, not only can increase the bearing capacity that monolith band structure 10 ' can bear, also the structural strength of monolith band structure 10 ' can effectively be promoted, effectively can prevent the flexural deformation of monolith band structure 10 ' simultaneously, and then promoted follow-up lead frame 30 in die bond, routing and the stability encapsulated, yield after making it encapsulate significantly promotes.
Referring to shown in Fig. 8, is the floor map of the 3rd embodiment of the utility model material-strap structure.At the utility model material-strap structure 10 " the 3rd embodiment in, it is lead frame 20 mainly " include two spaced drawing bands 23 ', plural number is connected between two drawing bands 23 ' and spaced support bar 24 ' and plural number to be arranged between two adjacent support bars 24 ' and the intercell connector 22 connected between two support bars 24 '.
Its each support bar 24 ' is positioned at non-same straight line with each intercell connector 22, and presents the setting of an angle, and in the present embodiment, support bar 24 ' and intercell connector 22 arrange in vertical direction.And lead frame 20 ' is by being separated out plural lead areas 21 between drawing band 23 ', support bar 24 ' and intercell connector 22, and carry a lead frame 30 respectively in each lead areas 21.
At the present embodiment, essential difference is, those support bars 28 ' are spaced and are connected between two drawing bands 23 ', and those intercell connectors 22 are connected in two adjacent support bars 24 ', and each intercell connector 22 is also provided with a reinforced structure 221 ', and then also can effectively prevent monolith band structure 10 " flexural deformation, also can effectively increase monolith band structure 10 " structural strength.
In sum, the material-strap structure of the utility model lead frame, mainly at the section structure changing intercell connector, the section structure of its intercell connector is presented non-planar, and then the bearing capacity of monolith band structure is promoted by those intercell connectors, effectively can prevent the flexural deformation of monolith band structure simultaneously, and then effectively promote the stability of follow-up encapsulation, and significantly promote the process yields of follow-up encapsulation.
Above are only the better enforcement aspect cited by the utility model, be not used to limit interest field of the present utility model, other use the equivalence of patent spirit of the present utility model to change, and all should belong to the scope of the claims that the utility model is contained.
Claims (9)
1. a material-strap structure for lead frame, is characterized in that, comprises:
One lead frame, it has the lead areas that plural number is adjacent one another are, and has an intercell connector between those wantonly two lead areas adjacent one another are; And
At least two lead frames, are arranged at respectively in this each lead areas, and are supported by this lead frame;
Wherein, the two ends of this intercell connector are connected on this lead frame, and this intercell connector is formed with a reinforced structure.
2. the material-strap structure of lead frame according to claim 1, it is characterized in that, this lead frame includes two spaced drawing bands and is located at the plural support bar of two drawing interbands, and those lead areas are by this two drawings band, plural support bar and those intercell connectors, and on this lead frame, institute's group is every forming, and those lead frames are supported in those lead areas by this two drawings band and those support bars.
3. the material-strap structure of lead frame according to claim 2, it is characterized in that, those support bars and those intercell connectors are positioned at non-same straight line.
4. the material-strap structure of lead frame according to claim 2, it is characterized in that, those support bars and those intercell connectors are that an angle is arranged.
5. the material-strap structure of lead frame according to claim 2, it is characterized in that, those support bars and those intercell connectors are arranged in a vertical manner.
6. the material-strap structure of lead frame according to claim 1 or 2, it is characterized in that, this reinforced structure is positioned at the central position of this intercell connector, makes the section of this intercell connector be a U-shaped.
7. the material-strap structure of lead frame according to claim 1 or 2, it is characterized in that, this reinforced structure is positioned at a lateral margin of this intercell connector, makes the section of this intercell connector be a J shape.
8. the material-strap structure of lead frame according to claim 1 or 2, is characterized in that, this reinforced structure is positioned at the corresponding lateral margin of two-phase of this intercell connector, makes the section of this intercell connector be a ㄇ shape.
9. the material-strap structure of lead frame according to claim 1 or 2, it is characterized in that, this reinforced structure is positioned at the two-phase respective side of this intercell connector, and direction is contrary each other, makes the section of this intercell connector be a ㄣ shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520132845.6U CN204577467U (en) | 2015-03-09 | 2015-03-09 | The material-strap structure of lead frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520132845.6U CN204577467U (en) | 2015-03-09 | 2015-03-09 | The material-strap structure of lead frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204577467U true CN204577467U (en) | 2015-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520132845.6U Expired - Fee Related CN204577467U (en) | 2015-03-09 | 2015-03-09 | The material-strap structure of lead frame |
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| Country | Link |
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| CN (1) | CN204577467U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023115320A1 (en) * | 2021-12-21 | 2023-06-29 | Texas Instruments Incorporated | Nonlinear structure for connecting multiple die attach pads |
-
2015
- 2015-03-09 CN CN201520132845.6U patent/CN204577467U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023115320A1 (en) * | 2021-12-21 | 2023-06-29 | Texas Instruments Incorporated | Nonlinear structure for connecting multiple die attach pads |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20180309 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |