Patent US5770918A successfully refreshed from Google Patents.
US5770918A
Expired / Lapsed
US
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Electroconductive frit and image-forming apparatus using the same
Assignee: Canon Inc
•
Filing: 1996-01-11
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Granted: 1998-06-23
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Expires: 2016-01-11
Abstract
Abstract Electroconductive frit includes glass (14) having a low melting point and a filler of fine glass particles (12) coated on the surface with metal(13). The electroconductive frit is used for bonding a spacer to an electron source substrate and a face plate in an image-forming apparatus to ensure mechanical securing strength and electrical connection.
Inventors
- 👤 Shinichi Kawate
- 👤 Kazuhiro Ohki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:15
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/24; H01J9/241; H01J9/242; H01B; H01B1/00; H01B1/14; H01B1/16; H01J29/00; H01J29/02; H01J29/028; H01J29/86; H01J29/864; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/125; H01J31/127; H01J9/02; H01J9/18; H01J9/185; H01J2201/00; H01J2201/30; H01J2201/316; H01J2201/3165; H01J2329/00; H01J2329/86; H01J2329/8625; H01J2329/864; H01J2329/8645; H01J2329/865; H01J2329/8655; H01J2329/866; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 53
Claim 1
Independent Claim
37 words
Electroconductive frit comprising: a low melting point glass; a fine glass particle filler; and a metal forming a layer on a surface of said fine glass particle filler, wherein said metal is disposed only on said surface.
Claim 2
Dependent Claim
37 words
Electroconductive frit comprising: a low melting point glass; a fine glass particle filler; and a metal forming a layer on a surface of said fine glass particle filler, wherein said metal is disposed only on said surface.
Claim 3
Dependent Claim
26 words
Electroconductive frit according to claim 1, wherein said frit further comprises a ceramic filler having a lower thermal expansion coefficient than said fine glass particle filler.
Claim 4
Dependent Claim
24 words
Electroconductive frit according to claim 2, wherein said ceramic filler has a thermal expansion coefficient of less than 70×10 -7 ° C. -1 .
Claim 5
Dependent Claim
28 words
Electroconductive frit according to claim 2, wherein said ceramic filler comprises at least one material selected from zircon, lead titanate, aluminum titanate, alumina, mullite, cordierite, β-eucryptite and β-spodumene.
Claim 6
Dependent Claim
28 words
Electroconductive frit according to claim 1, wherein said metal layer has a double-layered structure of two different metals formed on the surface of said fine glass particle filler.
Claim 7
Dependent Claim
26 words
Electroconductive frit according to claim 5, wherein the outer layer of said double-layered structure comprises one metal selected from Cu, Ni, Cr, Au, Ag and Pt.
Claim 8
Dependent Claim
20 words
Electroconductive frit according to claim 1, wherein said metal layer is formed on the fine glass particle filler by plating.
Claim 9
Dependent Claim
25 words
Electroconductive frit according to claim 1, wherein said metal layer formed on the fine glass particle filler has a thickness between 0.005 and 1 μm.
Claim 10
Dependent Claim
25 words
Electroconductive frit according to claim 8, wherein said metal layer formed on the fine glass particle filler has a thickness between 0.02 and 0.1 μm.
Claim 11
Dependent Claim
33 words
Electroconductive frit according to claim 1, wherein said fine glass particle filler having said metal layer is added to said low melting point glass in an amount from 3 to 95% by weight.
Claim 12
Dependent Claim
33 words
Electroconductive frit according to claim 10, wherein said fine glass particle filler having said metal layer is added to said low melting point glass in an amount from 5 to 40% by weight.
Claim 13
Dependent Claim
33 words
Electroconductive frit according to claim 11, wherein said fine glass particle filler having said metal layer is added to said low melting point glass in an amount from 10 to 25% by weight.
Claim 14
Dependent Claim
21 words
Electroconductive frit according to claim 1, wherein said electroconductive frit shows a volume resistivity between 10 -5 and 10 4 Ωcm.
Claim 15
Dependent Claim
21 words
Electroconductive frit according to claim 1, wherein said electroconductive frit shows a volume resistivity between 10 -3 and 10 10 Ωcm.
Claim 16
Dependent Claim
18 words
Electroconductive frit according to claim 1, wherein said fine glass particle filler comprises silica or soda lime glass.
Claim 17
Dependent Claim
17 words
Electroconductive frit according to claim 1, wherein said fine glass particle filler is formed of spherical particles.
Claim 18
Dependent Claim
19 words
Electroconductive frit according to claim 16, wherein said spherical particle have an average diameter between 5 and 50 μm.
Claim 19
Dependent Claim
18 words
Electroconductive frit according to claim 1, wherein said electroconductive frit further comprises a vehicle and is made pasty.
Claim 20
Dependent Claim
16 words
Electroconductive frit according to claim 1, wherein said low melting point glass comprises a noncrystalline glass.
Claim 21
Dependent Claim
16 words
Electroconductive frit according to claim 1, wherein said low melting point glass comprises a crystalline glass.
Claim 22
Dependent Claim
63 words
An image-forming apparatus comprising a face plate having a fluorescent body and an electron accelerating electrode, an electron source substrate disposed opposite the face plate and having electron source and an electroconductive spacer disposed between said face plate and said electron source substrate, wherein said face plate and said spacer are mechanically secured by means of an electroconductive frit according to claim 1.
Claim 23
Dependent Claim
24 words
An image-forming apparatus according to claim 21, wherein said accelerating electrode and said electroconductive spacer are electrically connected by means of said electroconductive frit.
Claim 24
Dependent Claim
15 words
An image-forming apparatus according to claim 21, wherein said accelerating electrode comprises a metal back.
Claim 25
Dependent Claim
31 words
An image-forming apparatus according to claim 21, wherein said face plate and said electroconductive spacer are mechanically secured by means of crystallized or noncrystallized frit in addition to said electroconductive frit.
Claim 26
Dependent Claim
17 words
An image-forming apparatus according to claim 21, wherein said electron source comprises a cold cathode electron source.
Claim 27
Dependent Claim
16 words
An image-forming apparatus according to claim 25, wherein said cold cathode electron source comprises field emitters.
Claim 28
Dependent Claim
19 words
An image-forming apparatus according to claim 25, wherein said cold cathode electron source comprises metal/insulating layer/metal type electron emitters.
Claim 29
Dependent Claim
18 words
An image-forming apparatus according to claim 25, wherein said cold cathode electron source comprises surface conduction electron-emitting devices.
Claim 30
Dependent Claim
25 words
An image-forming apparatus according to claim 21, wherein said electroconductive spacer comprises a glass member and a semiconductor thin film formed on said glass member.
Claim 31
Dependent Claim
16 words
An image-forming apparatus according to claim 29, wherein said semiconductor thin film comprises SnO 2 .
Claim 32
Dependent Claim
15 words
An image-forming apparatus according to claim 29, wherein said glass member comprises soda lime glass.
Claim 33
Dependent Claim
15 words
An image-forming apparatus according to claim 21, wherein said electroconductive spacer has a plate-like shape.
Claim 34
Dependent Claim
15 words
An image-forming apparatus according to claim 21, wherein said electroconductive spacer has a columnar shape.
Claim 35
Dependent Claim
24 words
An image-forming apparatus according to claim 21, wherein said electron source substrate comprises a soda lime glass plate and an electron source formed thereon.
Claim 36
Dependent Claim
17 words
An image-forming apparatus according to claim 21, wherein said face plate comprises a soda lime glass plate.
Claim 37
Dependent Claim
50 words
An image-forming apparatus according to claim 21, wherein said apparatus further comprises a support frame for forming a sealed space between said electron source substrate and said face plate and said support frame is bonded to said electron source substrate and said face plate by means of an insulating frit.
Claim 38
Dependent Claim
68 words
An image-forming apparatus comprising a face plate having a fluorescent body and an electron accelerating electrode, an electron source substrate disposed opposite the face plate and having an electron source and a wire and an electroconductive spacer disposed between said face plate and said electron source substrate, wherein said electron source substrate and said spacer are mechanically secured by means of an electroconductive frit according to claim 1.
Claim 39
Dependent Claim
23 words
An image-forming apparatus according to claim 31, wherein said wire and said electroconductive spacer are electrically connected by means of said electroconductive frit.
Claim 40
Dependent Claim
15 words
An image-forming apparatus according to claim 37, wherein said accelerating electrode comprises a metal back.
Claim 41
Dependent Claim
33 words
An image-forming apparatus according to claim 37, wherein said electron source substrate and said electroconductive spacer are mechanically secured by means of a crystallized or noncrystallized frit in addition to said electroconductive frit.
Claim 42
Dependent Claim
17 words
An image-forming apparatus according to claim 37, wherein said electron source comprises a cold cathode electron source.
Claim 43
Dependent Claim
16 words
An image-forming apparatus according to claim 41, wherein said cold cathode electron source comprises field emitters.
Claim 44
Dependent Claim
19 words
An image-forming apparatus according to claim 41, wherein said cold cathode electron source comprises metal/insulating layer/metal type electron emitters.
Claim 45
Dependent Claim
18 words
An image-forming apparatus according to claim 41, wherein said cold cathode electron source comprises surface conduction electron-emitting devices.
Claim 46
Dependent Claim
25 words
An image-forming apparatus according to claim 37, wherein said electroconductive spacer comprises a glass member and a semiconductor thin film formed on said glass member.
Claim 47
Dependent Claim
16 words
An image-forming apparatus according to claim 45, wherein said semiconductor thin film comprises SnO 2 .
Claim 48
Dependent Claim
15 words
An image-forming apparatus according to claim 45, wherein said glass member comprises soda lime glass.
Claim 49
Dependent Claim
15 words
An image-forming apparatus according to claim 37, wherein said electroconductive spacer has a plate-like shape.
Claim 50
Dependent Claim
15 words
An image-forming apparatus according to claim 37, wherein said electroconductive spacer has a columnar shape.
Claim 51
Dependent Claim
24 words
An image-forming apparatus according to claim 37, wherein said electron source substrate comprises a soda lime glass plate and an electron source formed thereon.
Claim 52
Dependent Claim
17 words
An image-forming apparatus according to claim 37, wherein said face plate comprises a soda lime glass plate.
Claim 53
Dependent Claim
50 words
An image-forming apparatus according to claim 37, wherein said apparatus further comprises a support frame for forming a sealed space between said electron source substrate and said face plate and said support frame is bonded to said electron source substrate and said face plate by means of an insulating frit.
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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) | 2001-06-22 | 2001-12-22 | 2002-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-22 | 2005-12-22 | 2006-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-22 | 2009-12-22 | 2010-06-23 | $7700.00 | Window Closed / Lapsed |