US3798059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thick film inductor with ferromagnetic core
Assignee: RCA Licensing Corp
•
Filing: 1970-04-20
•
Granted: 1974-03-19
•
Expires: 1990-04-20
Abstract
Abstract Thick film inductor suitable for hybrid integrated circuits comprising successive layers of powdered sintered ferromagnetic material in a cured catalyst-hardenable resin binder and a pattern of conductors comprising powdered metal in a cured catalyst-hardenable resin.
Inventors
- 👤 B Astle
- 👤 J Guiot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:36
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/0006; H01F17/0013; H01F1/00; H01F1/0027; H01F2017/0046; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49076; Y10T29/4908; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24413; Y10T428/24802; Y10T428/24893; Y10T428/24909; Y10T428/31504; Y10T428/31533
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
29 words
A method according to claim 1 including depositing a second layer of ferromagnetic particles in a catalyst-hardenable resin binder on top of said conductor pattern and said first layer.
Claim 2
Dependent Claim
62 words
An inductor for a thick-film hybrid circuit comprising: an insulating substrate, a layer on said substrate comprising particles of a sintered ferromagnetic substance in a cured catalyst-hardenable resin binder in a proportion of at least about 4 to 1 by weight, a pattern of conductors on said layer constituting an inductance, said conductors comprising metal particles in a cured catalyst-hardenable resin binder.
Claim 3
Dependent Claim
19 words
An article according to claim 3 in which the percentage of ferromagnetic material in said layer is about 85.
Claim 4
Dependent Claim
14 words
An article according to claim 4 in which said ferromagnetic material is a ferrite.
Claim 5
Dependent Claim
23 words
An article according to claim 3 in which said resin in said layer and in said pattern of conductors is an epoxy resin.
Claim 6
Dependent Claim
16 words
An article according to claim 3 in which said pattern of conductors is a filamentary spiral.
Claim 7
Dependent Claim
18 words
An article according to claim 3 including a second layer of ferromagnetic particles in a catalyst-hardenable resin binder.
Claim 8
Dependent Claim
23 words
An article according to claim 8 including a second pattern of conductors on said second layer, connected to said first-mentioned pattern of conductors.
Claim 9
Dependent Claim
17 words
An article according to claim 9 in which both of said patterns of conductors are filamentary spirals.
Claim 10
Dependent Claim
34 words
An article according to claim 3 in which said layer of ferromagnetic particles and resin binder has the shape of an annulus and said pattern of conductors is a toroidal winding around said annulus.
Claim 11
Dependent Claim
15 words
An article according to claim 11 in which said toroidal winding has a ribbon-like configuration.
Claim 12
Dependent Claim
22 words
An article according to claim 3 in which said layer of ferromagnetic particles in said resin binder is recessed within said substrate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |