JPS642451Y2 - - Google Patents
Info
- Publication number
- JPS642451Y2 JPS642451Y2 JP1346478U JP1346478U JPS642451Y2 JP S642451 Y2 JPS642451 Y2 JP S642451Y2 JP 1346478 U JP1346478 U JP 1346478U JP 1346478 U JP1346478 U JP 1346478U JP S642451 Y2 JPS642451 Y2 JP S642451Y2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- circuit board
- stepped portion
- semiconductor device
- view
- 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
Links
- 239000004065 semiconductor Substances 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000001721 transfer moulding Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Electric Clocks (AREA)
- Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
- Structure Of Printed Boards (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1346478U JPS642451Y2 (en]) | 1978-02-06 | 1978-02-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1346478U JPS642451Y2 (en]) | 1978-02-06 | 1978-02-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54116751U JPS54116751U (en]) | 1979-08-16 |
| JPS642451Y2 true JPS642451Y2 (en]) | 1989-01-20 |
Family
ID=28831602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1346478U Expired JPS642451Y2 (en]) | 1978-02-06 | 1978-02-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS642451Y2 (en]) |
-
1978
- 1978-02-06 JP JP1346478U patent/JPS642451Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54116751U (en]) | 1979-08-16 |
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