JPS6489551A - Manufacture of lead frame for semiconductor device - Google Patents
Manufacture of lead frame for semiconductor deviceInfo
- Publication number
- JPS6489551A JPS6489551A JP24833287A JP24833287A JPS6489551A JP S6489551 A JPS6489551 A JP S6489551A JP 24833287 A JP24833287 A JP 24833287A JP 24833287 A JP24833287 A JP 24833287A JP S6489551 A JPS6489551 A JP S6489551A
- Authority
- JP
- Japan
- Prior art keywords
- punching
- inner lead
- flat area
- area
- correction
- 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.)
- Pending
Links
Landscapes
- Lead Frames For Integrated Circuits (AREA)
Abstract
PURPOSE:To decrease the variation of correction and improve the tip positioning accuracy of inner leads by selecting a punching position in such a manner that at least half the punching area coincides with the flat area of the back of an inner lead. CONSTITUTION:A punched metal lead frame has a flat area 4 at the back of its inner lead 2, and the flat area becomes wider with the width of the inner lead 2. The punching point for positional correction is selected toward the tie bar of the tapered inner lead, so that at least half the punching area can coincide with the flat area 4. This requires less correction if formed portions 5 are different in shape.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24833287A JPS6489551A (en) | 1987-09-30 | 1987-09-30 | Manufacture of lead frame for semiconductor device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24833287A JPS6489551A (en) | 1987-09-30 | 1987-09-30 | Manufacture of lead frame for semiconductor device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6489551A true JPS6489551A (en) | 1989-04-04 |
Family
ID=17176510
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24833287A Pending JPS6489551A (en) | 1987-09-30 | 1987-09-30 | Manufacture of lead frame for semiconductor device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6489551A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57210651A (en) * | 1981-06-19 | 1982-12-24 | Toshiba Corp | Lead frame and manufacture thereof |
-
1987
- 1987-09-30 JP JP24833287A patent/JPS6489551A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57210651A (en) * | 1981-06-19 | 1982-12-24 | Toshiba Corp | Lead frame and manufacture thereof |
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