US5440075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-sided printed circuit board a multi-layered printed circuit board
Assignee: Panasonic Holdings Corp
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Filing: 1993-09-20
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Granted: 1995-08-08
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Expires: 2013-09-20
Abstract
Abstract A two-sided printed circuit board including a base having a first surface, a second surface substantially parallel to the first surface, and a plurality of through-holes formed in the base; a first conductive layer provided on the first surface of the base; a second conductive layer provided on the second surface of the base; and a conductive particle buried in each of the through-holes in a pressurized state for electrically connecting the first conductive layer and the second conductive layer.
Inventors
- 👤 Kouji Kawakita
- 👤 Masahide Tsukamoto
- 👤 Yasuhiko Horio
- 👤 Seiichi Nakatani
- 👤 Akihito Hatakeyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:47
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/40; H05K3/4038; H05K3/4046; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0366; H05K2201/00; H05K2201/02; H05K2201/0275; H05K2201/0278; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355; H05K2201/0364; H05K2201/0382; H05K2201/10; H05K2201/10227; H05K2201/10234; H05K2201/10378; H05K3/46; H05K3/4611; H05K3/4614; H05K3/4644; H05K3/4652; H10; H10W; H10W90/00; H10W90/701; H10W90/721; H10W90/724; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49126; Y10T29/49128; Y10T29/49155; Y10T29/49165
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
79 words
A two-sided printed circuit board, comprising: a base having a first surface, and a second surface substantially parallel to the first surface, the base having a plurality of through-holes; a first conductive layer provided on the first surface of the base; a second conductive layer provided on the second surface of the base; and a conductive particle provided in each of the through-holes in a pressurized state for electrically connecting the first conductive layer and the second conductive layer.
Claim 2
Dependent Claim
79 words
A two-sided printed circuit board, comprising: a base having a first surface, and a second surface substantially parallel to the first surface, the base having a plurality of through-holes; a first conductive layer provided on the first surface of the base; a second conductive layer provided on the second surface of the base; and a conductive particle provided in each of the through-holes in a pressurized state for electrically connecting the first conductive layer and the second conductive layer.
Claim 3
Dependent Claim
27 words
A two-sided printed circuit board according to claim 1, wherein the base is formed of a composite material containing an aromatic polyamide fiber and a thermosetting resin.
Claim 4
Dependent Claim
20 words
A two-sided printed circuit board according to claim 1, wherein the base is formed of an alamid epoxy resin sheet.
Claim 5
Dependent Claim
18 words
A two-sided printed circuit board according to claim 1, wherein the conductive particle is formed of a metal.
Claim 6
Dependent Claim
32 words
A two-sided printed circuit board according to claim 4, wherein the conductive particle is formed of a material selected from the group consisting of gold, silver, copper, nickel, palladium, lead and tin.
Claim 7
Dependent Claim
24 words
A two-sided printed circuit board according to claim 1, wherein each conductive particle includes a core and a conductive particle layer enclosing the core.
Claim 8
Dependent Claim
31 words
A two-sided printed circuit board according to claim 6, wherein the core is formed of a metal, and the conductive particle layer is formed of another metal adhering to the core.
Claim 9
Dependent Claim
31 words
A two-sided printed circuit board according to claim 6, wherein the core is formed of a resin, and the conductive particle layer is formed of a metal adhering to the core.
Claim 10
Dependent Claim
66 words
A multi-layered printed circuit board, comprising: two bases provided in a laminated state; and a conductive layer provided between the two bases, wherein the bases each include a plurality of through-holes, the through-holes each have a conductive particle provided therein in a pressurized state, and the conductive particle electrically connects the conductive layer and another conductive layer provided on at least one of the two bases.
Claim 11
Dependent Claim
66 words
A multi-layered printed circuit board, comprising: two bases provided in a laminated state; and a conductive layer provided between the two bases, wherein the bases each include a plurality of through-holes, the through-holes each have a conductive particle provided therein in a pressurized state, and the conductive particle electrically connects the conductive layer and another conductive layer provided on at least one of the two bases.
Claim 12
Dependent Claim
27 words
A multi-layered printed circuit board according to claim 9, wherein the bases are formed of a composite material containing an aromatic polyamide fiber and a thermosetting resin.
Claim 13
Dependent Claim
20 words
A multi-layered printed circuit board according to claim 9, wherein the bases are formed of an alamid epoxy resin sheet.
Claim 14
Dependent Claim
18 words
A multi-layered printed circuit board according to claim 9, wherein the conductive particle is formed of a metal.
Claim 15
Dependent Claim
31 words
A multi-layered printed circuit board according to claim 12, wherein the conductive particles formed of a material selected from the group consisting of gold, silver, copper, nickel, palladium, lead and tin.
Claim 16
Dependent Claim
24 words
A two-sided printed circuit board according to claim 9, wherein each conductive particle includes a core and a conductive particle layer enclosing the core.
Claim 17
Dependent Claim
31 words
A two-sided printed circuit board according to claim 14, wherein the core is formed of a metal, and the conductive particle layer is formed of another metal adhering to the core.
Claim 18
Dependent Claim
31 words
A two-sided printed circuit board according to claim 14, wherein the core is formed of a resin, and the conductive particle layer is formed of a metal adhering to the core.
References Cited (Backward Citations)
US3077511A
Cited
US3335489A
Cited
US3922777A
Cited
JPS5438562A
Cited
JPS59158582A
Cited
JPS59175191A
Cited
JPS60136400A
Cited
JPS60200595A
Cited
JPS618987A
Cited
JPS6124298A
Cited
JPS6347991A
Cited
US4791248A
Cited
US5155301A
Cited
US5219639A
Cited
US5281771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-08-07 | 1999-02-06 | 1999-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-07 | 2003-02-06 | 2003-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-07 | 2007-02-06 | 2007-08-08 | $7700.00 | Window Closed / Lapsed |