JPS553678A - Preparation of lead frame - Google Patents
Preparation of lead frameInfo
- Publication number
- JPS553678A JPS553678A JP7629078A JP7629078A JPS553678A JP S553678 A JPS553678 A JP S553678A JP 7629078 A JP7629078 A JP 7629078A JP 7629078 A JP7629078 A JP 7629078A JP S553678 A JPS553678 A JP S553678A
- Authority
- JP
- Japan
- Prior art keywords
- base material
- alloy
- metal
- lead frame
- layer
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/495—Lead-frames or other flat leads
- H01L23/49579—Lead-frames or other flat leads characterised by the materials of the lead frames or layers thereon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Lead Frames For Integrated Circuits (AREA)
Abstract
PURPOSE:To obtain a lead frame, by changing a surface-layer metallic material into an inky condition, by producing a surface-layer metallic layer by means of printing and by sintering the layer. CONSTITUTION:The powder (The diameters of powder are approximate 0.1- 1mum) of a metallic material, which melting point is lower than base material metal and which soldering capacity is better than the base material metal, such as, an Ag-Cu alloy, etc. is changed into an inky condition with an organic solvent and a binder, and printed on a base material in an alloy containing Ni, such as, a Fe-Ni alloy, a Fe-Ni-Co alloy, etc. The base material is dried at approximate 80-180 deg.C to evaporate the organic solvent, and sintered not less than the eutectic temperature of surface metal and not more than the melting point of the base material metal in hydrogen or rare gases. When the Ag-Cu alloy is printed on the Fe-Ni base material, the conditions of 850-900 deg.C and 15-30 minutes are better. If this lead frame is produced in this manner, a precious metal pattern with the high degree of freedom can be obtained, the process of work is also short and expensive devices are also unnecessary.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7629078A JPS553678A (en) | 1978-06-23 | 1978-06-23 | Preparation of lead frame |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7629078A JPS553678A (en) | 1978-06-23 | 1978-06-23 | Preparation of lead frame |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS553678A true JPS553678A (en) | 1980-01-11 |
Family
ID=13601190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7629078A Pending JPS553678A (en) | 1978-06-23 | 1978-06-23 | Preparation of lead frame |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS553678A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5869293U (en) * | 1981-11-05 | 1983-05-11 | 株式会社精工舎 | clock |
JPS6321862A (en) * | 1986-07-15 | 1988-01-29 | Kyocera Corp | Manufacture of lead frame for ic ceramic package |
-
1978
- 1978-06-23 JP JP7629078A patent/JPS553678A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5869293U (en) * | 1981-11-05 | 1983-05-11 | 株式会社精工舎 | clock |
JPS6321862A (en) * | 1986-07-15 | 1988-01-29 | Kyocera Corp | Manufacture of lead frame for ic ceramic package |
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