US4499333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic component cap and seal
Assignee: PRINTED CIRCUITS INTERNATIONAL Inc 1145 SONORA COURT SUNNYVALE CA 94086 A CORP OF CA
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Filing: 1983-03-28
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Granted: 1985-02-12
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Expires: 2003-03-28
Abstract
Abstract A cap and seal including a central cap (20) to be positioned over an electronic component such as an integrated circuit chip (12), has a spaced upstanding wall or dam (22) which may be staked to the circuit board in assembly forming with the peripheral side wall (21) of the cap a channel or moat (19). Bridging means (24) extend between wall (21) and wall (22) onto which is placed a preform ring (30) of solid sealant material. Heating of the assembly, more particularly ring (30), allows melted sealant material to flow under and around bridging means (24) to form a confined seal between wall (21), wall (22) and an annular surface (29) on the circuit board surrounding cap wall (21).
Inventors
- 👤 Aik T. Chee
- 👤 Wee S. Kiat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:33
CPC Classifications
H; H05; H05K; H05K5/00; H05K5/02; H05K5/03
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
59 words
A cover for an electronic component mounted on a substrate comprising an upstanding continuous boundary wall, an imperforate cap portion spaced interiorly of said wall and forming with said wall a continuous open-top channel, said cap portion adapted to encompass said electronic component, and means for spacing said wall and said cap portion without blocking all of said channel.
Claim 2
Dependent Claim
59 words
A cover for an electronic component mounted on a substrate comprising an upstanding continuous boundary wall, an imperforate cap portion spaced interiorly of said wall and forming with said wall a continuous open-top channel, said cap portion adapted to encompass said electronic component, and means for spacing said wall and said cap portion without blocking all of said channel.
Claim 3
Dependent Claim
27 words
The invention of claim 1 in which said means comprises a series of bridging members extending across said channel at a medial vertical position of said channel.
Claim 4
Dependent Claim
21 words
The invention of claim 1 in which cap portion is a central circular dome and said boundary wall extends concentrical therearound.
Claim 5
Dependent Claim
16 words
The invention of claim 1 in which said cap portion extends vertically above said boundary wall.
Claim 6
Dependent Claim
24 words
The invention of claim 1 in which said cap portion comprises a circular inclined wall and a conical top continually bridging said inclined wall.
Claim 7
Dependent Claim
15 words
The invention of claim 1 in which said cap portion comprises a central curved dome.
Claim 8
Dependent Claim
27 words
The invention of claim 1 further including stake means extending from a bottom edge of said boundary wall adapted to mate with an aperture in said substrate.
Claim 9
Dependent Claim
29 words
The invention of claim 1 further including sealing material adapted to be placed in said channel to seal peripheral bottom side edges of said cap portion to a substrate.
Claim 10
Dependent Claim
44 words
The invention of claim 8 in which said sealing material is a preform insertible above said channel and adapted, upon heating, to flow into sealing position in said channel between said peripheral bottom side edges of said cap portion, said boundary wall and substrate.
Claim 11
Dependent Claim
57 words
The invention of claim 1 comprising a series of multiple cap portions fixedly connected to said boundary wall and spaced from each other and from said boundary wall, forming multiple channels, said means comprising bridging members between said boundary wall and said cap portions and means for connecting each of said cap portions to other cap portions.
Claim 12
Dependent Claim
22 words
The invention of claim 1 comprising a matrix of covers as therein recited with means to detach adjacent covers from one another.
Claim 13
Dependent Claim
82 words
In a circuit board having an integrated circuit chip mounted thereon, metallization patterns extending over a surface of the board, and a cover positionable over the chip, the improvement comprising an upstanding imperforate cap extending over the chip having the cap periphery in contact with said board, an upstanding continuous wall surrounding and spaced from said cap forming a channel extending to said board surface, and sealing means insertable into said channel to seal the periphery of said cap to said board.
Claim 14
Dependent Claim
82 words
In a circuit board having an integrated circuit chip mounted thereon, metallization patterns extending over a surface of the board, and a cover positionable over the chip, the improvement comprising an upstanding imperforate cap extending over the chip having the cap periphery in contact with said board, an upstanding continuous wall surrounding and spaced from said cap forming a channel extending to said board surface, and sealing means insertable into said channel to seal the periphery of said cap to said board.
Claim 15
Dependent Claim
24 words
The invention of claim 12 further including means extending across said channel connecting said wall and said cap without blocking all of said channel.
Claim 16
Dependent Claim
39 words
The invention of claim 12 in which said sealing means is a solid continuous preform of sealant insertable in said channel and adapted upon flowing to seal said continuous wall and peripheral portions of said cap to said board.
Claim 17
Dependent Claim
60 words
The invention of claim 14 including bridging means extending across said channel connecting said wall and said cap, said bridging means extending medially between upper and lower edges of said wall and said cap so that sealing means flows above and below said bridging means providing a continuous band of sealing means around said cap in attachment to said board.
Claim 18
Dependent Claim
20 words
The invention of claim 12 in which said cap is a circular dome and said wall is concentrically spaced therefrom.
Claim 19
Dependent Claim
24 words
The invention of claim 12 in which said continuous wall and said cap are integrally formed with a series of bridging members connected therebetween.
Claim 20
Dependent Claim
42 words
The invention of claim 12 in which said wall is circular and multiple caps are connected thereto inwardly spaced from said wall, sealant channels being formed between said multiple caps in flow communication with said first-mentioned channel formed with said continuous wall.
Claim 21
Dependent Claim
36 words
The invention of claim 12 in which said continuous wall includes stake means extending outwardly from a bottom surface of the continuous wall, said board including aperture means surrounding said chip to receive said stake means.
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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |