US4707565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substrate for printed circuit
Assignee: Nitto Boseki Co Ltd
•
Filing: 1986-03-17
•
Granted: 1987-11-17
•
Expires: 2006-03-17
Abstract
Abstract In a substrate of a printed circuit, a metal foil is mounted onto at least one of the outermost surfaces of a laminate made of a plurality of glass fiber woven fabrics impregnated with synthetic resin, and heated and pressed. Warps and wefts of the glass fiber fabrics filamentated their filaments. The synthetic resin enters gaps among the opening filaments so that the vertically laminated glass fiber fabrics including the opening fibers are integrally jointed with each other. Warps and wefts of the glass fiber fabrics may have their surfaces made fuzzy so that the synthetic resin enters fuzzy filaments. Furthermore, the thus produced substrate may be used as a multilayer printed circuit substrate.
Inventors
- 👤 Shin Kasai
- 👤 Hideharu Waketa
- 👤 Keiichi Kato
- 👤 Yutaka Kawaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:04
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/46; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0366; H05K2201/00; H05K2201/02; H05K2201/0275; H05K2201/029; H05K2201/20; H05K2201/2072; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3382; Y10T442/3415; Y10T442/3431
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
A substrate for a printed circuit, in which a metal foil is mounted onto at least one of the outermost surfaces of a laminate made of a plurality of glass fiber woven fabrics comprised of warps and wefts impregnated with synthetic resin, and heated and pressed wherein said warps and wefts are in the form of threads comprised of a plurality of filaments, the filaments of said glass fiber woven fabrics being open, such that said synthetic resin fills gaps among the opened said filaments so that the said laminated glass fiber woven fabrics including the opened filaments are integrally joined with each other.
Claim 2
Dependent Claim
104 words
A substrate for a printed circuit, in which a metal foil is mounted onto at least one of the outermost surfaces of a laminate made of a plurality of glass fiber woven fabrics comprised of warps and wefts impregnated with synthetic resin, and heated and pressed wherein said warps and wefts are in the form of threads comprised of a plurality of filaments, the filaments of said glass fiber woven fabrics being open, such that said synthetic resin fills gaps among the opened said filaments so that the said laminated glass fiber woven fabrics including the opened filaments are integrally joined with each other.
Claim 3
Dependent Claim
113 words
A substrate for a printed circuit, in which a metal foil is mounted onto at least one of the outermost surfaces of a laminate made of a plurality of glass fiber woven fabrics comprised of warps and wefts impregnated with synthetic resin, and heated and pressed, wherein said warps and wefts are in the form of threads comprised of a plurality of filaments, the filaments of said glass fiber woven fabrics being open and their surfaces being fuzzy, such that said synthetic resin fills gaps among the opened and fuzzy said filaments so that the said laminated glass fiber woven fabrics including the opened and fuzzy filaments are integrally joined with each other.
Claim 4
Dependent Claim
113 words
A substrate for a printed circuit, in which a metal foil is mounted onto at least one of the outermost surfaces of a laminate made of a plurality of glass fiber woven fabrics comprised of warps and wefts impregnated with synthetic resin, and heated and pressed, wherein said warps and wefts are in the form of threads comprised of a plurality of filaments, the filaments of said glass fiber woven fabrics being open and their surfaces being fuzzy, such that said synthetic resin fills gaps among the opened and fuzzy said filaments so that the said laminated glass fiber woven fabrics including the opened and fuzzy filaments are integrally joined with each other.
Claim 5
Dependent Claim
83 words
A multilayer printed circuit substrate, in which a plurality of glass cloth prepregs impregnated with synthetic resin are laminated; metal foil is mounted onto the outermost surfaces thereof; and the laminate is heated and pressed, wherein warps and wefts of said glass cloths are in the form of threads comprised of a plurality of filaments, the filaments being opened, such that said synthetic resin enters gaps among the opened filaments to thereby integrally join and laminate said glass cloth prepregs to each other.
Claim 6
Dependent Claim
83 words
A multilayer printed circuit substrate, in which a plurality of glass cloth prepregs impregnated with synthetic resin are laminated; metal foil is mounted onto the outermost surfaces thereof; and the laminate is heated and pressed, wherein warps and wefts of said glass cloths are in the form of threads comprised of a plurality of filaments, the filaments being opened, such that said synthetic resin enters gaps among the opened filaments to thereby integrally join and laminate said glass cloth prepregs to each other.
Claim 7
Dependent Claim
23 words
A multilayer printed circuit substrate according to claim 3, in which a plurality of multilayer printed circuit substrates are stacked, heated and pressed.
Claim 8
Dependent Claim
33 words
A multilayer printed circuit substrate according to claim 4, in which electric circuits are formed on surfaces of internally stacked ones of said plurality of stacked, heated and pressed multilayer printed circuit substrates.
Claim 9
Dependent Claim
34 words
A multilayer printed circuit substrate according to claim 4 or 5, in which glass cloth prepregs are interposed between the adjacent ones of said plurality of stacked, heated, and pressed multilayer printed circuit substrates.
Claim 10
Dependent Claim
26 words
A multilayer printed circuit substrate according to claim 6, in which warps and wefts of glass cloth of said glass cloth prepregs have their filaments opened.
References Cited (Backward Citations)
US2561449A
Cited
US2688006A
Cited
US4452847A
Cited
JPS59196243A
Cited
US4477512A
Cited
US4501787A
Cited
US4563385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |