GB845112A - Improvements in or relating to bonded assemblies - Google Patents
Improvements in or relating to bonded assembliesInfo
- Publication number
- GB845112A GB845112A GB3356856A GB3356856A GB845112A GB 845112 A GB845112 A GB 845112A GB 3356856 A GB3356856 A GB 3356856A GB 3356856 A GB3356856 A GB 3356856A GB 845112 A GB845112 A GB 845112A
- Authority
- GB
- United Kingdom
- Prior art keywords
- indium
- electrode
- coated
- parts
- copper
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
845,112. Welding by pressure. GENERAL ELECTRIC CO. Ltd. Oct. 31, 1957 [Nov. 2, 1956], No. 33568/56. Class 83 (4). [Also in Group XXXVI] In bonding two parts, the surface of at least one part consisting of soft metal, the surfaces of the two parts are slid one over the other and the parts are pressed together to form a clean surface of the soft metal on the part or parts and to effect a bond therebetween. The end face of a cylindrical metal block is coated with indium on which a flat surface is formed by slicing or turning and this flat surface is pressed under a pressure of 15 pounds per square inch against the end face of another cylindrical metal block, one surface being rotated relatively to the other for one rotation of about 2 seconds, to effect bonding. The indium surface may be slightly convex and both end faces may be coated with indium. A crystal of semiconductor bismuth telluride is coated with indium and bonded as before to an indiumcoated metal block carrying a cooling fin to form a thermo junction for a thermo electric refrigerator. According to the Provisional Specification, in making a semi-conductor power rectifier comprising a germanium element attached as described in Specification 806,596 to one end of a first electrode in the form of a cylindrical copper block, a coating of indium is applied to the other end of the electrode and to an end face of a cylindrical copper core carrying cooling fins and the indium surfaces are pressed together under a pressure of 15 pounds per square inch while one is rotated relative to the other. A second electrode is coated with indium which is pressed against a bead of indium on the germanium element while relatively rotating the parts. A hermetic enclosure for the element comprising a copper cup-shaped envelope with a flanged rim has the rim coated with indium and is then, in an inert atmosphere, pressed and rotated against indium in an annular channel in a disc of copper or nickel-plated stainless steel having an opening in which the first electrode is secured. A lead on the second electrode is crimped into a copper thimble in the envelope. Indium may be applied to only one of the surfaces to be bonded. Specifications 808,776 and 845,111 also are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3356856A GB845112A (en) | 1956-11-02 | 1956-11-02 | Improvements in or relating to bonded assemblies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3356856A GB845112A (en) | 1956-11-02 | 1956-11-02 | Improvements in or relating to bonded assemblies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB845112A true GB845112A (en) | 1960-08-17 |
Family
ID=10354621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3356856A Expired GB845112A (en) | 1956-11-02 | 1956-11-02 | Improvements in or relating to bonded assemblies |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB845112A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3791028A (en) * | 1971-09-17 | 1974-02-12 | Ibm | Ultrasonic bonding of cubic crystal-structure metals |
| GB2132601A (en) * | 1982-12-23 | 1984-07-11 | Ferranti Plc | Joining articles of materials of different expansion coefficients |
-
1956
- 1956-11-02 GB GB3356856A patent/GB845112A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3791028A (en) * | 1971-09-17 | 1974-02-12 | Ibm | Ultrasonic bonding of cubic crystal-structure metals |
| GB2132601A (en) * | 1982-12-23 | 1984-07-11 | Ferranti Plc | Joining articles of materials of different expansion coefficients |
| US4930676A (en) * | 1982-12-23 | 1990-06-05 | Ferranti International Plc | Joint between articles of materials of different coefficients of thermal expansion |
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