GB1467168A - Process for manufacturing a base for a semiconductor device - Google Patents
Process for manufacturing a base for a semiconductor deviceInfo
- Publication number
- GB1467168A GB1467168A GB2956274A GB2956274A GB1467168A GB 1467168 A GB1467168 A GB 1467168A GB 2956274 A GB2956274 A GB 2956274A GB 2956274 A GB2956274 A GB 2956274A GB 1467168 A GB1467168 A GB 1467168A
- Authority
- GB
- United Kingdom
- Prior art keywords
- recess
- base
- projection
- blank
- die
- 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
-
- H10W70/027—
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D48/00—Individual devices not covered by groups H10D1/00 - H10D44/00
- H10D48/01—Manufacture or treatment
- H10D48/04—Manufacture or treatment of devices having bodies comprising selenium or tellurium in uncombined form
-
- H10W72/20—
Landscapes
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
1467168 Making semi-conductor bases; forging; extruding Y SATO 3 July 1974 [10 July 1973 22 Nov 1973] 29562/74 Headings B3A B3H and B3P A method of making a base 12, Fig. 1, for a semi-conductor 10 comprises forming a blank 30 for the base, forming a recess 14 in the intended upper surface of the base with a projection 114 Fig. 4, extending from the bottom of the recess, and forming a stem portion 18A on the intended undersurface of the base wherein the recess is initially formed with a projection from its bottom surface and the projection is absorbed into the bottom surface as the recess attains the desired depth. The blank comprises a thermally and electrically conductive metal 26, e.g. Cu, and a weldable layer 28, e.g. Cu-Ni, formed by blanking a plurality of blanks from a clad or composite metal sheet. The layer 28 is removed to expose the base metal 26 for later attachment of the semi-conductor element 16. The blank is then introduced into a die assembly 36, Fig. 8 comprising a lower die 38 having a cavity 38a and an upper die 40 having a recess 40a. A knockout 42 extends through the lower die and includes a telescopically extending knockout pin 44. During downward movement of the die 40 a shallow recess 14A and shallow stem 18A are produced and since the pin 44 is momentarily retracted a projection 114 is formed in the recess. Upon further downward movement the projection is removed and the pin is lengthened and the recess is deepened. In an alternative embodiment, the lower die has a concave end profile (46), Fig. 9 (not shown), which produces a profile (114<SP>1</SP>) on the blank 30 of convex shape. Also, the base may be formed of a single metal rather than of a composite and thus obviate the removal of the upper layer 28. A base plate (236), Fig. 10 (not shown), of steel or iron may be mounted within the recess in the base of the mounting of the device (216). After working in the die assembly the stem portion is threaded by rolling.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7705173A JPS5116300B2 (en) | 1973-07-10 | 1973-07-10 | |
| JP13072773A JPS5132954B2 (en) | 1973-11-22 | 1973-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1467168A true GB1467168A (en) | 1977-03-16 |
Family
ID=26418154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2956274A Expired GB1467168A (en) | 1973-07-10 | 1974-07-03 | Process for manufacturing a base for a semiconductor device |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3893325A (en) |
| FR (1) | FR2236572B1 (en) |
| GB (1) | GB1467168A (en) |
| NL (1) | NL7409192A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4192063A (en) * | 1975-12-10 | 1980-03-11 | Yoshio Sato | Method for manufacturing a base of a semi-conductor device |
| US4341106A (en) * | 1977-04-13 | 1982-07-27 | Gleason Works | Apparatus for controlling the movement of a reciprocatory hydraulically driven element of a metal forming machine |
| CA1114779A (en) * | 1978-07-18 | 1981-12-22 | Nissan Motor Co., Ltd. | Process of closed extrusion shaping of a metal rod material and an apparatus therefor |
| JPS5812089B2 (en) * | 1980-01-17 | 1983-03-07 | 日産自動車株式会社 | Closed extrusion equipment |
| EP0683746A1 (en) * | 1993-02-18 | 1995-11-29 | David Robert Sergeant | Container end closure |
| CN1060415C (en) * | 1997-04-25 | 2001-01-10 | 张应宪 | Technological process of manufacturing steel flange blank |
| AU2001251530A1 (en) * | 2000-04-10 | 2001-10-23 | Intri-Plex Technologies, Inc. | Making integral heat spreader by coining |
| CN105499463B (en) * | 2015-12-28 | 2018-10-02 | 无锡透平叶片有限公司 | A kind of large-scale rectangular die holder structure with prestressing force flanging |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3186209A (en) * | 1960-04-14 | 1965-06-01 | Nat Machinery Co | Method of cold forming an elongated hollow article |
| US3417597A (en) * | 1967-02-06 | 1968-12-24 | Francis S. Napoli | Weld stud |
| JPS5147659B1 (en) * | 1971-06-14 | 1976-12-16 |
-
1974
- 1974-07-03 GB GB2956274A patent/GB1467168A/en not_active Expired
- 1974-07-05 US US486083A patent/US3893325A/en not_active Expired - Lifetime
- 1974-07-08 NL NL7409192A patent/NL7409192A/en not_active Application Discontinuation
- 1974-07-09 FR FR7423882A patent/FR2236572B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2432681B2 (en) | 1976-06-16 |
| US3893325A (en) | 1975-07-08 |
| FR2236572A1 (en) | 1975-02-07 |
| DE2432681A1 (en) | 1975-01-30 |
| NL7409192A (en) | 1975-01-14 |
| FR2236572B1 (en) | 1978-01-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |