US4703393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mounting structure of flat-lead package-type electronic component
Assignee: Fujitsu Ltd
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Filing: 1985-07-22
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Granted: 1987-10-27
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Expires: 2005-07-22
Abstract
Abstract A mounting structure of a flat-lead package-type electronic component wherein ends of lead terminals drawn out from a surface of a package are bent to be horizontal with respect to the plane of the package and other portions of said lead terminal are tilted inward by a desired angle with respect to the normal of the plane.
Inventors
- 👤 Tsuyoshi Yamamoto
- 👤 Nobuhide Okada
- 👤 Yasuo Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:13
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/18; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/341; H05K3/3421; H05K3/3426; H05K1/02; H05K1/0271; H05K2201/00; H05K2201/10; H05K2201/10613; H05K2201/10621; H05K2201/10689; H05K2201/10742; H05K2201/1075; H05K2201/10757; Y; Y02; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
A mounting structure of a flat-lead package-type electronic component comprising: lead terminals having ends drawn out from a surface of a package and bent to be horizontal with respect to the plane of the package and other portions of said lead terminal tilted inwardly by a desired angle with respect to the normal of the plane, and a printed wiring board on which said component is arranged and a reinforcement member contacting said lead terminals and provided in a gap formed between said electronic component and said printed wiring board.
Claim 2
Dependent Claim
90 words
A mounting structure of a flat-lead package-type electronic component comprising: lead terminals having ends drawn out from a surface of a package and bent to be horizontal with respect to the plane of the package and other portions of said lead terminal tilted inwardly by a desired angle with respect to the normal of the plane, and a printed wiring board on which said component is arranged and a reinforcement member contacting said lead terminals and provided in a gap formed between said electronic component and said printed wiring board.
Claim 3
Dependent Claim
35 words
A mounting structure of a flat-lead package-type electronic component according to claim 1, wherein said reinforcement member has grooves provided at the sides thereof and said reinforcement member contacts said lead terminals at said grooves.
Claim 4
Dependent Claim
44 words
A mounting structure of a flat-lead package-type electronic component according to claim 1, wherein said desired angle is ##EQU3## wherein R is a radius of curvature of a lead, h is a height of the lead, and t is a thickness of the lead.
Claim 5
Dependent Claim
21 words
A mounting structure of a flat-lead package-type electronic component according to claim 1, wherein said reinforcement member reinforces said lead terminals.
Claim 6
Dependent Claim
25 words
A mounting structure of a flat-lead package-type electronic component according to claim 1, wherein said reinforcement member forms said desired angle of said lead terminals.
References Cited (Backward Citations)
US3588618A
Cited
JPS57155758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-26 | 1991-04-27 | 1991-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-26 | 1995-04-27 | 1995-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-26 | 1999-04-27 | 1999-10-27 | $7700.00 | Window Closed / Lapsed |