US4403107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stamped circuit board
Assignee: TE Connectivity Corp
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Filing: 1980-12-15
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Granted: 1983-09-06
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Expires: 2000-12-15
Abstract
Abstract A circuit board is fabricated comprising a metal layer laminated to an underlying dielectric substrate. Portions of the metal layer are separated and recessed into stable indented portions of the substrate by a stamping die, roller, or the like. The substrate is composed of a cellular material, for example, polysulfone impregnated with hollow glass spheres, whereby the indented portions of the substrate are compacted by impression of the die profile to receive separated portions of the metal layer therein.
Inventors
- 👤 Norman E. Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:21
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0373; H05K3/00; H05K3/02; H05K3/04; H05K3/041; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0116; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0209; H05K2201/0242; H05K2201/0254; H05K2201/09; H05K2201/09009; H05K2201/09045; H05K2203/00; H05K2203/01; H05K2203/0104; H05K2203/0108; H05K2203/15; H05K2203/1545; H05K3/10; H05K3/107; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49158; Y10T29/4916; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249987; Y10T428/24999
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
A circuit board of the type comprising a dielectric substrate and a layer of metal bonded to at least one surface thereof with portions of said metal layer being recessed as metal portions into said substrate characterized in that: said substrate comprising a cellular material formed either from a polymer matrix having fracturable bubbles therein or a blown polymeric foam which volumetrically compacts to receive said recessed metal portions therein as stable indented portions separated from said metal layer without resultant protrusions corresponding to said recessed metal portions occurring at the other surface of said substrate.
Claim 2
Dependent Claim
96 words
A circuit board of the type comprising a dielectric substrate and a layer of metal bonded to at least one surface thereof with portions of said metal layer being recessed as metal portions into said substrate characterized in that: said substrate comprising a cellular material formed either from a polymer matrix having fracturable bubbles therein or a blown polymeric foam which volumetrically compacts to receive said recessed metal portions therein as stable indented portions separated from said metal layer without resultant protrusions corresponding to said recessed metal portions occurring at the other surface of said substrate.
Claim 3
Dependent Claim
31 words
A circuit board as set forth in claim 1, wherein said cellular material comprises a homogenous mixture of plastics carrier material and material means for inducing porosity in said carrier material.
Claim 4
Dependent Claim
16 words
A circuit board as set forth in claim 2, wherein said plastics carrier material comprises polysulfone.
Claim 5
Dependent Claim
16 words
A circuit board as set forth in claim 2, wherein said material means comprises glass bubbles.
References Cited (Backward Citations)
US2757443A
Cited
US3239915A
Cited
US3506533A
Cited
US3470059A
Cited
US3697668A
Cited
US3628243A
Cited
US3873392A
Cited
US3931762A
Cited
GB1452337A
Cited
US4095008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |