CN202067788U - TO220B-7L waterproof sealed lead frame - Google Patents
TO220B-7L waterproof sealed lead frame Download PDFInfo
- Publication number
- CN202067788U CN202067788U CN 201120114885 CN201120114885U CN202067788U CN 202067788 U CN202067788 U CN 202067788U CN 201120114885 CN201120114885 CN 201120114885 CN 201120114885 U CN201120114885 U CN 201120114885U CN 202067788 U CN202067788 U CN 202067788U
- Authority
- CN
- China
- Prior art keywords
- lead frame
- to220b
- chip bottom
- dao
- center
- Prior art date
- 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.)
- Expired - Fee Related
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- Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
Abstract
The utility model provides a TO220B-7L waterproof sealed lead frame, wherein the combination intensity between the lead frame and plastic cement is high, and waterproof property is good. The TO220B-7L waterproof sealed lead frame includes a heat radiation fixed part, a chip bottom pad and an outer pin. The chip bottom pad is provided with a chip. The TO220B-7L waterproof sealed lead frame is characterized in that the periphery of the center of the chip bottom pad is provided with V-shaped water-stop grooves, and the periphery of the V-shaped water-stop grooves of the chip bottom pad is provided with concave-convex grooves.
Description
Technical field
The utility model relates to the technical field of semiconductor packages, is specially a kind of TO220B-7L waterproof sealing lead frame.
Background technology
Existing TO220B-7L sealed lead frame carries out plastic packaging after the chip section substrate of chip and lead frame is seated, because chip bottom Ji Dao's is the plane all around, so the bond strength of lead frame and plastic cement is low, water proofing property is poor.
Summary of the invention
At the problems referred to above, the utility model provides a kind of TO220B-7L waterproof sealing lead frame, and it makes bond strength height, the good waterproof performance of lead frame and plastic cement.
A kind of TO220B-7L waterproof sealing lead frame, its technical scheme is such: it comprises heat radiation fixed part, chip bottom Ji Dao, outer pin, chip is installed at the center of described chip bottom Ji Dao, it is characterized in that: have the V-type water-blocking groove around the center of described chip bottom Ji Dao, have tongue and groove around the V-type water-blocking groove outside of described chip bottom Ji Dao.
It is further characterized in that: the described V-type water-blocking groove around the center of described chip bottom Ji Dao is interconnected and forms a closed space;
Described tongue and groove around the center of described chip bottom Ji Dao is connected and forms a closed space;
Described tongue and groove is specially the not grooving of mid portion of any two adjacent grooves and the structure that is combined to form.
After adopting said structure of the present utility model, after chip was installed in the center of chip section Ji Dao, because the existence of tongue and groove, the bond strength height of lead frame behind the plastic packaging and plastic cement, good waterproof performance were because water proofing property has further been guaranteed in the existence of V-type water-blocking groove.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is that the A-A of Fig. 1 cuts open the structural representation enlarged drawing;
Fig. 3 is that the B-B of Fig. 2 cuts open the structural representation enlarged drawing.
Embodiment
See Fig. 1, Fig. 2, Fig. 3, it comprises fin fixed part 1, chip bottom base island 2, outer pin 3, the center on chip bottom base island 2 is installed chip and (is not drawn among the figure, belong to existing mature structure), have V-type water-blocking groove 4 around the center on chip bottom base island 2, chip bottom base island 2 be positioned at V-type water-blocking groove 4 outsides around have a tongue and groove 5, V-type water-blocking groove 4 all around is connected and forms a closed space; Tongue and groove 5 all around is connected and forms a closed space, and tongue and groove 5 is specially the not grooving of mid portion of any two adjacent grooves 6 and the structure that is combined to form.
Wherein: TO220B-7L is a model of lead frame.
Claims (4)
1. TO220B-7L waterproof sealing lead frame, it comprises heat radiation fixed part, chip bottom Ji Dao, outer pin, chip is installed at the center of described chip bottom Ji Dao, it is characterized in that: have the V-type water-blocking groove around the center of described chip bottom Ji Dao, have tongue and groove around the V-type water-blocking groove outside of described chip bottom Ji Dao.
2. a kind of TO220B-7L waterproof sealing lead frame according to claim 1 is characterized in that: the described V-type water-blocking groove around the center of described chip bottom Ji Dao is interconnected and forms a closed space.
3. a kind of TO220B-7L waterproof sealing lead frame according to claim 1 is characterized in that: the described tongue and groove around the center of described chip bottom Ji Dao is connected and forms a closed space.
4. according to the described a kind of TO220B-7L waterproof sealing lead frame of the arbitrary right of claim 1 to 3, it is characterized in that: described tongue and groove is specially the not grooving of mid portion of any two adjacent grooves and the structure that is combined to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120114885 CN202067788U (en) | 2011-04-19 | 2011-04-19 | TO220B-7L waterproof sealed lead frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120114885 CN202067788U (en) | 2011-04-19 | 2011-04-19 | TO220B-7L waterproof sealed lead frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202067788U true CN202067788U (en) | 2011-12-07 |
Family
ID=45061643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120114885 Expired - Fee Related CN202067788U (en) | 2011-04-19 | 2011-04-19 | TO220B-7L waterproof sealed lead frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202067788U (en) |
-
2011
- 2011-04-19 CN CN 201120114885 patent/CN202067788U/en not_active Expired - Fee Related
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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: 20111207 Termination date: 20150419 |
|
| EXPY | Termination of patent right or utility model |