US3890637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor element envelope
Assignee: Mitsubishi Electric Corp
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Filing: 1974-01-17
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Granted: 1975-06-17
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Expires: 1994-01-17
Abstract
Abstract A semiconductor element is resiliently held in an annular member of elastic, electrically insulating material having its inside diameter somewhat smaller than the diameter of the element. The annular member is provided at each end with an annular engaging portion having circumferential fins disposed at its outer and inner peripheral edges. One electrode block is fitted into each open end portion of the annular member until it is in compressive contact with the semiconductor element while the fins are spread out on an annular surface on the electrode block to form a more complete hermetic seal between the engaging portion of the annular member and each electrode block.
Inventors
- 👤 Isamu Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:09
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/20; H10W40/22; H10W72/00; H10W74/00; H10W74/10; H10W74/131; H10W76/00; H10W76/10; H10W76/12; H10W76/13; H10W76/138; H10W76/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
180 words
A semiconductor device comprising, in combination, an annular member of elastic, electrically insulating material including a main portion in the form of a hollow cylinder and an annular engaging portion disposed at least at one end of said main cylindrical portion, said engaging portion including at least one annular fin integrally formed with said main portion; a semiconductor element including a wafer of semiconductive material having at least one P-N junction disposed therein and contacting the inner peripheral surface of said annular member; and a pair of electrode blocks forming an envelope for the semiconductor element with said annular member, each of said electrode blocks including a surface portion, each of said electrode blocks being disposed in contact with said semiconductor element while said surface portion of said electrode block is in engagement with said engaging portions on said annular member so that said annular fin is spread out on said surface portion of the associated electrode block, whereby the semiconductor element is hermetically sealed up between said annular fin and said surface portion of each of the electrode blocks.
Claim 2
Dependent Claim
180 words
A semiconductor device comprising, in combination, an annular member of elastic, electrically insulating material including a main portion in the form of a hollow cylinder and an annular engaging portion disposed at least at one end of said main cylindrical portion, said engaging portion including at least one annular fin integrally formed with said main portion; a semiconductor element including a wafer of semiconductive material having at least one P-N junction disposed therein and contacting the inner peripheral surface of said annular member; and a pair of electrode blocks forming an envelope for the semiconductor element with said annular member, each of said electrode blocks including a surface portion, each of said electrode blocks being disposed in contact with said semiconductor element while said surface portion of said electrode block is in engagement with said engaging portions on said annular member so that said annular fin is spread out on said surface portion of the associated electrode block, whereby the semiconductor element is hermetically sealed up between said annular fin and said surface portion of each of the electrode blocks.
Claim 3
Dependent Claim
18 words
A semiconductor device as claimed in claim 1 wherein said annular member is formed of a synthetic rubber.
Claim 4
Dependent Claim
30 words
A semiconductor device as claimed in claim 1 wherein said electrode blocks are in contact with said semiconductor element along the longitudinal axis of said annular member and under pressure.
Claim 5
Dependent Claim
31 words
A semiconductor device as claimed in claim 3 wherein said surface portion of each of said electrode blocks lies in plane substantially normal to the longitudinal axis of said annular member.
Claim 6
Dependent Claim
33 words
A semiconductor device as claimed in claim 3 wherein said surface portion of each of said electrode blocks is formed of a cylindrical surface coaxial with the longitudinal axis of said annular member.
Claim 7
Dependent Claim
33 words
A semiconductor device as claimed in claim 4 wherein said annular fin is disposed along the inner peripheral edge of said annular engaging portion and spread out toward the interior of said envelope.
Claim 8
Dependent Claim
33 words
A semiconductor device as claimed in claim 4 wherein said annular fin is disposed along the outer peripheral edge of said annular engaging portion and spread out toward the exterior of said envelope.
Claim 9
Dependent Claim
61 words
A semiconductor device as claimed in claim 1 wherein said annular engaging portion has disposed along the inner and outer peripheral edges thereof a pair of first and second annular fins spread out toward the interior and exterior of said envelope respectively and wherein said engaging surface lies in a plane substantially normal to the longitudinal axis of said annular member.
Claim 10
Dependent Claim
36 words
A semiconductor device as claimed in claim 5 wherein said annular engaging portion is folded radially inwardly of the longitudinal axis of said annular member and provided on the end portion thereof with said annular fin.
Claim 11
Dependent Claim
50 words
A semiconductor device as claimed in clAim 1 wherein said semiconductor element has a diameter greater than the inside diameter of said main cylindrical portion of said annular member and is held on the inner peripheral surface of said main cylindrical portion due to an elastic deformation of the latter.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |