US4882455A
Expired / Lapsed
US
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Electronic circuit substrates
Assignee: Ibiden Co Ltd
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Filing: 1988-08-02
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Granted: 1989-11-21
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Expires: 2008-08-02
Abstract
Abstract An electronic circuit substrate having excellent machinability and dimensional accuracy is disclosed, which comprises a porous ceramic sintered body having a three-dimensional network structure and contains permeable pores, and a resin filled into the permeable pores.
Inventors
- 👤 Yasuyuki Sato
- 👤 Shinji Saito
- 👤 Hidetoshi Yamauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:36
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; C; C03; C03C; C03C10/00; C03C10/0054; C03C12/00; C03C17/00; C03C17/006; C03C17/007; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C3/072; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/48; C04B41/4853; C04B41/52; C04B41/80; C04B41/81; C04B41/82; C04B41/83; C04B41/89; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W70/692; H10W70/695; C03C2217/00; C03C2217/40; C03C2217/43; C03C2217/46; C03C2217/465; C04B2111/00; C04B2111/00474; C04B2111/00844; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0116; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249956; Y10T428/249978
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
69 words
An electronic circuit, comprising: a porous ceramic sintered substrate consisting essentially of a crystal structure of a three-dimensional network, crystal grains having an average grain size of not greater than 10 microns, and an initial permeable porosity of 10-70 volume %; a resin filled in the permeable pores of the porous ceramic sintered substrate; and an electrically conducting circuit pattern printed on at least one surface of said substrate.
Claim 2
Dependent Claim
69 words
An electronic circuit, comprising: a porous ceramic sintered substrate consisting essentially of a crystal structure of a three-dimensional network, crystal grains having an average grain size of not greater than 10 microns, and an initial permeable porosity of 10-70 volume %; a resin filled in the permeable pores of the porous ceramic sintered substrate; and an electrically conducting circuit pattern printed on at least one surface of said substrate.
Claim 3
Dependent Claim
54 words
An electronic circuit according to claim 1, wherein said porous ceramic sintered substrate mainly comprises at least one material selected from the group consisting of Al 2 O 3 , SiO 2 , ZnO, ZrO 2 , MgO, PbO, B 2 O 3 , Si 3 N 4 , BN, AlN and combinations thereof.
Claim 4
Dependent Claim
32 words
An electronic circuit according to claim 1, wherein said porous ceramic sintered substrate, after said permeable pores are filled with said resin, has a porosity of not greater than 10 volume %.
Claim 5
Dependent Claim
17 words
An electronic circuit according to claim 1, wherein said porosity is not greater than 5 volume %.
Claim 6
Dependent Claim
51 words
An electronic circuit according to claim 1, wherein said resin is selected from the group consisting of epoxy resin, polyimide resin, triazine resin, polyparabonic acid resin, polyamide imide resin, silicone resin, epoxy silicone resin, acrylic resin, methacrylic resin, aniline resin, phenolic resin, urethane resin, furan resin, fluorine resin and mixtures thereof.
Claim 7
Dependent Claim
31 words
An electronic circuit according to claim 1, wherein said porous ceramic sintered substrate further comprises a mixture of resin and inorganic fibers applied to at least one surface of said substrate.
Claim 8
Dependent Claim
172 words
An electronic circuit comprising: a porous ceramic sintered substrate comprising a material selected from the group consisting of Al 2 O 3 , SiO 2 , ZnO, ZrO 2 , MgO, PbO, B 2 O 3 , Si 3 N 4 , BN, AlN and combinations thereof, said porous ceramic sintered substrate consisting essentially of a crystal structure of a three-dimensional network, crystal grains having an average grain size of not greater than 10 microns and a permeable porosity of 10-70 volume %; a resin comprising a material selected from the group consisting of epoxy resin, polyimide resin, triazine resin, polyparabonic acid resin, polyamide imide resin, silicone resin, epoxy silicone resin, acrylic resin, methacrylic resin, aniline resin, phenolic resin, urethane resin, furan resin, fluorine resin and mixtures thereof, said resin being filled into the pores of the porous ceramic sintered substrate, thereby enhancing the machinability of the substrate and rendering said substrate substantially air impermeable after sintering; and an electrically conducting circuit pattern printed on at least one surface of said substrate.
Claim 9
Dependent Claim
172 words
An electronic circuit comprising: a porous ceramic sintered substrate comprising a material selected from the group consisting of Al 2 O 3 , SiO 2 , ZnO, ZrO 2 , MgO, PbO, B 2 O 3 , Si 3 N 4 , BN, AlN and combinations thereof, said porous ceramic sintered substrate consisting essentially of a crystal structure of a three-dimensional network, crystal grains having an average grain size of not greater than 10 microns and a permeable porosity of 10-70 volume %; a resin comprising a material selected from the group consisting of epoxy resin, polyimide resin, triazine resin, polyparabonic acid resin, polyamide imide resin, silicone resin, epoxy silicone resin, acrylic resin, methacrylic resin, aniline resin, phenolic resin, urethane resin, furan resin, fluorine resin and mixtures thereof, said resin being filled into the pores of the porous ceramic sintered substrate, thereby enhancing the machinability of the substrate and rendering said substrate substantially air impermeable after sintering; and an electrically conducting circuit pattern printed on at least one surface of said substrate.
Claim 10
Dependent Claim
29 words
An electronic circuit according to claim 7, wherein said substrate, after said permeable pores are filled with said resin, has a porosity of not greater than 10 volume %.
Claim 11
Dependent Claim
29 words
An electronic circuit according to claim 7, wherein said substrate, after said permeable pores are filled with said resin, has a porosity of not greater than 5 volume %.
Claim 12
Dependent Claim
31 words
An electronic circuit according to claim 7, wherein said porous ceramic sintered substrate further comprises a mixture of resin and inorganic fibers applied to at least one surface of said substrate.
Claim 13
Dependent Claim
90 words
An electronic circuit, comprising: a porous ceramic sintered substrate consisting essentially of a crystal structure of a three-dimensional network, crystal grains having an average grain size of not greater than 10 microns, and an initial permeable porosity of 10-70 volume %; a resin filled in the permeable pores of the porous ceramic sintered substrate; an inorganic fiber cloth impregnated with a resin, said cloth being integrally bonded to at least one surface of said substrate; and an electrically conducting circuit pattern printed on at least one surface of said substrate.
Claim 14
Dependent Claim
90 words
An electronic circuit, comprising: a porous ceramic sintered substrate consisting essentially of a crystal structure of a three-dimensional network, crystal grains having an average grain size of not greater than 10 microns, and an initial permeable porosity of 10-70 volume %; a resin filled in the permeable pores of the porous ceramic sintered substrate; an inorganic fiber cloth impregnated with a resin, said cloth being integrally bonded to at least one surface of said substrate; and an electrically conducting circuit pattern printed on at least one surface of said substrate.
Claim 15
Dependent Claim
54 words
An electronic circuit according to claim 11, wherein said porous ceramic sintered substrate mainly comprises at least one material selected from the group consisting of Al 2 O 3 , SiO 2 , ZnO, ZrO 2 , MgO, PbO, B 2 O 3 , Si 3 N 4 , BN, AlN and combinations thereof.
Claim 16
Dependent Claim
32 words
An electronic circuit according to claim 11, wherein said porous ceramic sintered substrate, after said permeable pores are filled with said resin, has a porosity of not greater than 10 volume %.
Claim 17
Dependent Claim
17 words
An electronic circuit according to claim 11, wherein said porosity is not greater than 5 volume %.
Claim 18
Dependent Claim
51 words
An electronic circuit according to claim 11, wherein said resin is selected from the group consisting of epoxy resin, polyimide resin, triazine resin, polyparabonic acid resin, polyamide imide resin, silicone resin, epoxy silicone resin, acrylic resin, methacrylic resin, aniline resin, phenolic resin, urethane resin, furan resin, fluorine resin and mixtures thereof.
References Cited (Backward Citations)
US2421652A
Cited
US2778762A
Cited
US3325303A
Cited
US3202591A
Cited
US3838204A
Cited
US3817781A
Cited
US3825468A
Cited
US3791863A
Cited
US4353957A
Cited
US3900940A
Cited
US4047290A
Cited
DE2748271A1
Cited
US4412377A
Cited
US4483751A
Cited
US4528212A
Cited
US4540621A
Cited
US4620264A
Cited
US4689262A
Cited
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| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
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