US4068368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure for semiconductor device and method of construction
Assignee: Bendix Corp
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Filing: 1976-08-09
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Granted: 1978-01-17
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Expires: 1996-08-09
Abstract
Abstract A silicon controlled rectifier has a triangular base with a planar mounting surface and holes at the apices of the angles to receive screws for mounting the rectifier to a heat sink surface. An anode ring having a skirt is threaded to a flange on the base and a semiconductor pellet is positioned on the base within the flange. A spring loaded cathode tube is positioned coaxially within the anode ring in engagement with the semiconductor pellet and a spring loaded gate is positioned coaxially within the cathode tube in engagement with the pellet to pressure mount the pellet on the base. A predetermined torque is applied to the anode ring when assembling it to the base to provide an accurate, predictable load on the pellet.
Inventors
- 👤 James Edward DeBard
- 👤 Raymond Walter Borden
- 👤 John Joseph Tumpey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:05
CPC Classifications
H; H10; H10W; H10W72/00; H10W76/00; H10W76/10; H10W76/12; H10W76/13; H10W76/136; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49169
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
A method of assembling a semiconductor device comprising securing a diaphragm with an aperture therein by means of insulation to a ring-shaped electrode having a threaded skirt depending therefrom, assembling a spring member on a cylindrical electrode having a flange at one end and inserting the cylindrical electrode through the aperture in the diaphragm with the spring member being positioned between the flange and the diaphragm, positioning a semiconductor pellet on a base having a threaded flange, positioning the flange of the cylindrical electrode on the semiconductor pellet, and screwing the threaded skirt onto the threaded flange on the base to a predetermined torque to compress the spring member and exert a predetermined pressure on the pellet, and securing the diaphragm to the cylindrical electrode.
Claim 2
Independent Claim
125 words
A method of assembling a semiconductor device comprising securing a diaphragm with an aperture therein by means of insulation to a ring-shaped electrode having a threaded skirt depending therefrom, assembling a spring member on a cylindrical electrode having a flange at one end and inserting the cylindrical electrode through the aperture in the diaphragm with the spring member being positioned between the flange and the diaphragm, positioning a semiconductor pellet on a base having a threaded flange, positioning the flange of the cylindrical electrode on the semiconductor pellet, and screwing the threaded skirt onto the threaded flange on the base to a predetermined torque to compress the spring member and exert a predetermined pressure on the pellet, and securing the diaphragm to the cylindrical electrode.
Claim 3
Dependent Claim
47 words
The method described in claim 1 including the steps of assembling a spring loaded electrode coaxial with the cylindrical electrode and insulated therefrom so that the spring loaded electrode contacts and engages the semiconductor pellet under compression when the other two electrodes are assembled to the base.
Claim 4
Dependent Claim
38 words
A method of assembling a semiconductor device as described in claim 1 including the step of assembling a wetting wafer between the base and to semiconductor pellet to provide an electrical interface between the base and the pellet.
Claim 5
Dependent Claim
37 words
A method of assembling a semiconductor device as described in claim 2 including the steps of hermetically sealing the diaphragm to the cathode tube and hermetically sealing the skirt of the ring shaped electrode to the base.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |