CN112582353A - Packaging structure of reverse-bending internal insulation product - Google Patents
Packaging structure of reverse-bending internal insulation product Download PDFInfo
- Publication number
- CN112582353A CN112582353A CN202011598870.5A CN202011598870A CN112582353A CN 112582353 A CN112582353 A CN 112582353A CN 202011598870 A CN202011598870 A CN 202011598870A CN 112582353 A CN112582353 A CN 112582353A
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- China
- Prior art keywords
- chip
- welding strip
- frame
- insulation product
- bending
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/16—Fillings or auxiliary members in containers or encapsulations, e.g. centering rings
- H01L23/18—Fillings characterised by the material, its physical or chemical properties, or its arrangement within the complete device
- H01L23/24—Fillings characterised by the material, its physical or chemical properties, or its arrangement within the complete device solid or gel at the normal operating temperature of the device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/12—Mountings, e.g. non-detachable insulating substrates
- H01L23/14—Mountings, e.g. non-detachable insulating substrates characterised by the material or its electrical properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/367—Cooling facilitated by shape of device
Abstract
The invention discloses a packaging structure of a reverse bending inner insulation product, belonging TO the technical field of semiconductor TO series packaging, and the technical scheme is as follows: the LED packaging structure comprises a radiating fin, an epoxy glue, a chip, an alumina substrate and frame pins, wherein a third welding strip is arranged above the radiating fin, the alumina substrate is arranged above the third welding strip, a second welding strip is arranged above the alumina substrate, the frame pins are arranged on the second welding strip, and the first welding strip is arranged above the frame pins, and the LED packaging structure has the beneficial effects that: the arrangement of the alumina substrate can insulate the chip and the radiating fins, so that the complete insulation of the chip and the radiating fins can be achieved, the heat of the chip can be effectively dissipated through the radiating fins, the insulation of the chip can be achieved, and the arrangement of the first stress release, the second stress release and the third stress release can enable the chip to be assembled and sintered on the frame pins to completely melt, so that the void rate of the back of the chip is reduced.
Description
Technical Field
The invention relates TO the technical field of semiconductor TO series packaging, in particular TO a packaging structure of a reverse-bending internal insulation product.
Background
The semiconductor packaging refers to a process of processing a wafer passing a test according to a product model and a function requirement to obtain an independent chip; the packaging process comprises the following steps: the wafer from the previous process of the wafer is cut into small chips after scribing process, then the cut chips are pasted on the corresponding small island of the substrate (lead frame) frame by glue, and then the bonding pads of the chips are connected to the corresponding pins of the substrate by utilizing superfine metal (gold tin copper aluminum) wires or conductive resin to form the required circuit; then packaging and protecting the independent wafer by using a plastic shell, carrying out a series of operations after plastic packaging, carrying out finished product testing after packaging, generally carrying out the processes of inspection, testing, packaging and the like, and finally warehousing and shipping; the semiconductor production flow comprises wafer manufacturing, wafer testing, chip packaging and testing after packaging; after plastic packaging, a series of operations such as post-curing, rib cutting and forming, electroplating, printing and the like are carried out; the typical packaging process flow is as follows: dicing, mounting, bonding, plastic packaging, deburring, electroplating, printing, cutting ribs, molding, appearance inspection, finished product testing, packaging and shipment.
The existing TO series packaging structure of a semiconductor has the following defects: in order to ensure that the chip has good insulation, the chip is tightly wrapped, so that the heat dissipation effect of the chip is poor; in order to provide a good heat dissipation effect to the chip, the insulation of the chip is deteriorated.
Therefore, it is necessary to invent a package structure of reverse-bending internal insulation product.
Disclosure of Invention
Therefore, the invention provides a packaging structure of a reverse-bending internal insulation product, wherein a first welding strip, a second welding strip and a third welding strip of high-temperature welding flux are used for welding a radiating fin, an alumina substrate, frame pins and a chip together, and an epoxy material colloid is arranged for encapsulating the chip and the alumina substrate, so that the chip is insulated and can be well radiated, and the defects of the traditional TO series packaging structure of a semiconductor are overcome.
In order to achieve the above purpose, the invention provides the following technical scheme:
a packaging structure of a reverse-bending internal insulation product comprises a radiating fin, an epoxy material colloid, a chip, an aluminum oxide substrate and frame pins, wherein a third welding strip is arranged above the radiating fin, the aluminum oxide substrate is arranged above the third welding strip, a second welding strip is arranged above the aluminum oxide substrate, the frame pins are arranged on the second welding strip, a first welding strip is arranged above the frame pins, the chip is arranged above the first welding strip, a first bending part and a first bending part are arranged on the frame pins, and the chip and the aluminum oxide substrate are encapsulated by the epoxy material colloid.
Preferably, the chip and the frame leads constitute the pole electrodes.
Preferably, the heat sink and the alumina substrate are fixed and connected by the solder strip III.
Preferably, the alumina substrate and the frame pins are fixed and connected through the second solder strip.
Preferably, the frame pin and the chip are fixed and connected through a first solder strip.
Preferably, the heat radiating fins are equidistantly provided with first stress releasing grooves.
Preferably, the bottom of the frame pin is provided with a third stress release groove, and the third stress release groove is semicircular.
Preferably, the top of the frame pin is provided with second stress release grooves at equal intervals, and the second stress release grooves are rectangular.
The invention has the beneficial effects that:
1. the arrangement of the alumina substrate can insulate the chip and the radiating fin, so that the complete insulation of the chip and the radiating fin can be achieved, the heat of the chip can be effectively dissipated through the radiating fin, and the insulation of the chip can be achieved;
2. the first stress release, the second stress release and the third stress release are arranged, so that the chip can be completely melted after being assembled and sintered on the frame pins, and the void ratio of the back of the chip is reduced.
Drawings
FIG. 1 is a schematic structural view provided by the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 provided in accordance with the present invention;
fig. 3 is an enlarged view of a portion a of fig. 2 according to the present invention.
In the figure: the structure comprises a radiating fin 1, an epoxy glue 3, a chip 4, an alumina substrate 5, a frame pin 6, a pole electrode 7, a first solder strip 8, a second solder strip 9, a third solder strip 10, a first stress release 11, a second stress release 12, a third stress release 13, a first bend 61 and a first bend 62.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to fig. 1-3 of the specification, the package structure of the reverse-bending internal insulation product of the embodiment includes a heat sink 1, an epoxy glue 3, a chip 4, an aluminum oxide substrate 5, and frame pins 6, a solder strip three 10 is disposed above the heat sink 1, the aluminum oxide substrate 5 is disposed above the solder strip three 10, a solder strip two 9 is disposed above the aluminum oxide substrate 5, the frame pins 6 are disposed on the solder strip two 9, a solder strip one 8 is disposed above the frame pins 6, the chip 4 is disposed above the solder strip one 8, first bends 61 and first bends 62 are disposed on the frame pins 6, and the epoxy glue 3 encapsulates the chip 4 and the aluminum oxide substrate 5; the second stress relief 12 and the third stress relief 13 are used for enabling the chip 4 to be assembled and sintered on the frame pins 6 to be completely melted, and the void ratio of the back surface of the chip 4 is reduced.
Further, the chip 4 and the frame leads 6 constitute the pole electrodes 7.
Further, the heat sink 1 and the alumina substrate 5 are fixed and connected by the solder strip three 10.
Further, the alumina substrate 5 and the frame pins 6 are fixed and connected through the second solder strip 9; the alumina substrate 5 mainly serves to insulate the chip 4 from the heat sink 1, so that the chip 4 and the heat sink 1 can be completely insulated, and the heat of the chip 4 can be effectively dissipated through the heat sink 1.
Further, the frame lead 6 and the chip 4 are fixed and connected by a solder strip-8.
Further, the heat sink 1 is provided with first stress relief grooves 11 at equal distances.
Further, a third stress relief groove 13 is formed in the bottom of the frame pin 6, and the third stress relief groove 13 is semicircular.
Furthermore, second stress relief grooves 12 are formed in the top of the frame pin 6 at equal intervals, and the second stress relief grooves 12 are rectangular.
The implementation scenario is specifically as follows: when the invention is used, first stress reliefs 11 are arranged on the radiating fin 1 at equal distances, semicircular third stress reliefs 13 are arranged at equal distances at the bottom of the frame pin 6, the top of the frame pin 6 is provided with a rectangular second stress relief 12, the right end of the frame pin 6 is bent twice to form a first bending part 61 and a first bending part 62, the heat sink 1 and the alumina substrate 5 are welded together by high-temperature solder, forming a solder strip III 10 between the heat sink 1 and the alumina substrate 5, soldering the alumina substrate 5 and the frame leads 6 together using a high temperature solder, forming a second solder strip 9 between the alumina substrate 5 and the frame pins 6, soldering the chip 4 on the frame pins 6 by using high-temperature solder, a solder strip 8 is formed between the chip 4 and the frame leads 6, and finally the chip 4 and the alumina substrate 5 are encapsulated by using epoxy glue.
The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solution described above. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a packaging structure of reverse bend internal insulation product, includes fin (1), epoxy colloid (3), chip (4), aluminium oxide base board (5), frame pin (6), its characterized in that: the LED packaging structure is characterized in that a third welding strip (10) is arranged above the radiating fin (1), the aluminum oxide substrate (5) is arranged above the third welding strip (10), a second welding strip (9) is arranged above the aluminum oxide substrate (5), the frame pins (6) are arranged on the second welding strip (9), a first welding strip (8) is arranged above the frame pins (6), the chip (4) is arranged above the first welding strip (8), a first bending part (61) and a first bending part (62) are arranged on the frame pins (6), and the chip (4) and the aluminum oxide substrate (5) are encapsulated by the epoxy material colloid (3).
2. The structure of claim 1, wherein the inner insulation product is formed by bending: the chip (4) and the frame leads (6) form a pole electrode (7).
3. The structure of claim 1, wherein the inner insulation product is formed by bending: the radiating fin (1) and the alumina substrate (5) are fixed and connected through the third welding strip (10).
4. The structure of claim 1, wherein the inner insulation product is formed by bending: the alumina substrate (5) and the frame pins (6) are fixed and connected through the second welding strip (9).
5. The structure of claim 1, wherein the inner insulation product is formed by bending: the frame pins (6) and the chip (4) are fixed and connected through a first welding strip (8).
6. The structure of claim 1, wherein the inner insulation product is formed by bending: the radiating fins (1) are equidistantly provided with first stress release grooves (11).
7. The structure of claim 1, wherein the inner insulation product is formed by bending: and a third stress release groove (13) is formed in the bottom of the frame pin (6), and the third stress release groove (13) is semicircular.
8. The structure of claim 1, wherein the inner insulation product is formed by bending: second stress release grooves (12) are formed in the tops of the frame pins (6) at equal intervals, and the second stress release grooves (12) are rectangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011598870.5A CN112582353A (en) | 2020-12-30 | 2020-12-30 | Packaging structure of reverse-bending internal insulation product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011598870.5A CN112582353A (en) | 2020-12-30 | 2020-12-30 | Packaging structure of reverse-bending internal insulation product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112582353A true CN112582353A (en) | 2021-03-30 |
Family
ID=75144106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011598870.5A Pending CN112582353A (en) | 2020-12-30 | 2020-12-30 | Packaging structure of reverse-bending internal insulation product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112582353A (en) |
-
2020
- 2020-12-30 CN CN202011598870.5A patent/CN112582353A/en active Pending
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