US4363930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit path conductors in plural planes
Assignee: TE Connectivity Corp
•
Filing: 1980-02-04
•
Granted: 1982-12-14
•
Expires: 2000-02-04
Abstract
Abstract A circuit board is fabricated from a metal layer laminated to an underlying dielectric substrate. A stamping die, or roller, formed with a deeply impressed pattern of circuit paths, is indented through the metal and into the substrate. The metal is formed into circuit path conductors, electrically isolated from one another by insetting sheared away portions of the metal into indented portions of the substrate.
Inventors
- 👤 Norman E. Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:35
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/02; H05K3/04; H05K3/041; H05K2201/00; H05K2201/09; H05K2201/09009; H05K2201/09045; H05K2203/00; H05K2203/01; H05K2203/0104; H05K2203/0108; H05K3/10; H05K3/107; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49158
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
170 words
A circuit board made by the process of laminating a layer of metal against a dielectric substrate, selected from a material which has an elongation in tensile to yield characteristic which prevents crack propagation in response to indentation, and dividing said layer of metal into formerly contiguous, recessed and nonrecessed conductor path portions, with each said recessed path portion being recessed into a stable, indented portion of said substrate and having its periphery separated and electrically isolated from the periphery of an adjacent nonrecessed path portion along shear lines extending into the thickness of said substrate, each indented portion having a periphery indented by yield elongation coinciding with said lines of shear, and a transition metal portion connected between and contiguous with at least one said metal recessed portion and at least one said metal unrecessed portion, said transition metal portion is defined between two converging but unjoined peripheral edges of said at least one said metal unrecessed portion and slopes toward said at least one said metal recessed portion.
Claim 2
Dependent Claim
170 words
A circuit board made by the process of laminating a layer of metal against a dielectric substrate, selected from a material which has an elongation in tensile to yield characteristic which prevents crack propagation in response to indentation, and dividing said layer of metal into formerly contiguous, recessed and nonrecessed conductor path portions, with each said recessed path portion being recessed into a stable, indented portion of said substrate and having its periphery separated and electrically isolated from the periphery of an adjacent nonrecessed path portion along shear lines extending into the thickness of said substrate, each indented portion having a periphery indented by yield elongation coinciding with said lines of shear, and a transition metal portion connected between and contiguous with at least one said metal recessed portion and at least one said metal unrecessed portion, said transition metal portion is defined between two converging but unjoined peripheral edges of said at least one said metal unrecessed portion and slopes toward said at least one said metal recessed portion.
Claim 3
Dependent Claim
49 words
The structure as recited in claim 1, wherein, said metal portions have been separated by being sheared from the remainder of said metal, and said substrate recessed portions have been abruptly indented along the lines of shear which separate said recessed metal portions from the remainder of said metal.
Claim 4
Dependent Claim
16 words
The structure as recited in claim 1, wherein said peripheral edges converge at an acute angle.
References Cited (Backward Citations)
US2925645A
Cited
US2912748A
Cited
US2986804A
Cited
US3293500A
Cited
US3431350A
Cited
US3546009A
Cited
US3535780A
Cited
US3628243A
Cited
US3911716A
Cited
US3760091A
Cited
US4017968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |