# US 7,755,269 B2 · Spacer and image display panel using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,755,269 B2 - Document ID: US7755269B2 - Status: Granted - Kind: B2 - Application number: 11/620,118 - Filed: 2007-01-05 - Published: 2007-07-12 - Granted: 2010-07-13 - Earliest claimed: 2006-01-06 - Assignees: Hitachi Displays, Ltd. - Inventors: Yuichi Sawai; Osamu Shiono; Takashi Namekawa; Nobuhiko Hosotani; Hiroshi Ito; Keiichi Kanazawa; Takashi Naitou; Hiroyuki Akata; Mitsuo Hayashibara; Shigemi Hirasawa; Motoyuki Miyata; Hiroki Yamamoto - Web page: https://patentgrep.com/patent/US7755269B2 ## CPC - H01J 31/127: {using large area or array sources, i.e. essentially a source for each pixel group} - C03C 3/21: containing titanium, zirconium, vanadium, tungsten or molybdenum - H01J 29/028: {Mounting or supporting arrangements for flat panel cathode ray tubes, e.g. spacers particularly relating to electrodes} - H01J 29/864: {Spacers between faceplate and backplate of flat panel cathode ray tubes} - H01J 2329/864: characterised by the material - H01J 2329/8645: with coatings on the lateral surfaces thereof - H01J 2329/8655: Conductive or resistive layers - H01J 2329/866: Adhesives - H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H) - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS ## Abstract It is an object of the present invention to provide a spacer which has an adequate Young's modulus for a spacer used in an image display panel and allows free adjustment of an electric resistance value, and an image display panel using the spacer. The spacer SPC holds a gap between a back panel PNL1 including a signal line CL, a scanning line GL, and an electronic source ELS provided for the main surface of a back substrate SUB1, and a front panel PNL2 including a fluorescent material PH, a black matrix BM, and an anode AD provided for the main surface of a front substrate SUB2. The spacer comprises phosphate glass including the same transition metal element with different valences. For electrical conduction, the included same transition metal element with different valences allows the use of hopping conduction between transition metal atoms with different valences to perform adjustment of electric resistance relatively easily. The transition metal element is at least one of vanadium (V), tungsten (W), molybdenum (Mo), niobium (Nb), and iron (Fe). ## Claims ### Claim 1 A spacer which holds a gap between insulating substrates at a predetermined value, the gap forming a decompressed space or an evacuated space, the spacer comprising phosphate glass containing a transition metal element, and the spacer bridging the insulating substrates, wherein the spacer comprises at least one of (a) 20 to 40 wt % of V2O5, 30 to 45 wt % of P2O5, 1 to 20 wt % of WO3, and 5 to 20 wt % of BaO, (b) 20 to 45 wt % of WO3, 20 to 40 wt % of P2O5, 10 to 25 wt % of V2O5, and 10 to 25 wt % of BaO, (c) 20 to 45 wt % of WO3, 25 to 40 wt % of P2O5, 10 to 25 wt % of V2O5, 10 to 25 wt % of BaO, and 5 to 15 wt % of MoO3, and (d) 1 to 10 wt % of SrO, and 1 to 5 wt % of Gd2O3, and 0.1 to 1.0 wt % of CeO2. ### Claim 2 (depends on 1) The spacer according to claim 1, wherein the phosphate glass includes the same element with different valences. ### Claim 3 (depends on 1) The spacer according to claim 1, wherein the transition metal element includes at least one of vanadium (V), tungsten (W), molybdenum (Mo), niobium (Nb), and iron (Fe). ### Claim 4 (depends on 1) The spacer according to claim 1, wherein the spacer has a surface electrical resistance of 1×108 to 1×1012Ω/□ and a three-point bending strength of 350 MPa or higher. ### Claim 5 (depends on 1) The spacer according to claim 1, wherein the spacer has a surface electrical resistance of 1×108 to 1×1Ω/□ and a three-point bending strength of 350 MPa or higher. ### Claim 6 (depends on 1) The spacer according to claim 1, wherein the spacer comprises 0.5 to 10 wt % of a compound selected from the group consisting of Sb2O3, ZrO2, GeO2, Cr2O3, Nb2O5, Al2O3, Y2O3, MgO, ErO2, CaO, and TiO2. ### Claim 7 (depends on 1) The spacer according to claim 1, wherein the spacer comprises an alkali metal element of 0.5 wt % or lower in terms of oxide (R2O). ### Claim 8 An image display panel comprising: a back panel including an insulating substrate, a plurality of scanning lines provided for a main surface of the insulating substrate, extending in a first direction, and arranged in a second direction intersecting with the first direction, a plurality of signal lines extending in the second direction and arranged in the first direction, and an electronic source provided near the intersection of the scanning line and the signal line; a front panel including a transparent insulating substrate, a fluorescent material layer provided for a main surface of the transparent insulating substrate and forming a pair with each of the electronic sources, an anode; a sealing frame inserted into the inner periphery at ends of the back panel and the front panel disposed such that their main surfaces are opposed with a predetermined gap between them, to form a decompression vessel together with the panels; and a spacer which holds the gap between the back panel and the front panels; wherein the spacer comprises phosphate glass containing a transition metal element; and wherein the spacer comprises at least one of (a) 20 to 40 wt % of V2O5, 30 to 45 wt % of P2O5, 1 to 20 wt % of WO3, and 5 to 20 wt % of BaO, (b) 20 to 45 wt % of WO3, 20 to 40 wt % of P2O5, 10 to 25 wt % of V2O5, and 10 to 25 wt % of BaO, (c) 20 to 45 wt % of WO3, 25 to 40 wt % of P2%, 10 to 25 wt % of V2O5, 10 to 25 wt % of BaO, and 5 to 15 wt % of MoO3, and (d) 1 to 10 wt % of SrO, and 1 to 5 wt % of Gd2O3, and 0.1 to 1.0 wt % of CeO2. ### Claim 9 (depends on 8) The image display panel according to claim 8, wherein the phosphate glass includes the same element with different valences. ### Claim 10 (depends on 8) The image display panel according to claim 8, wherein the transition metal element includes at least one of vanadium (V), tungsten (W), molybdenum (Mo), niobium (Nb), and iron (Fe). ### Claim 11 (depends on 8) The image display panel according to claim 8, wherein the spacer has a surface electrical resistance of 1×108 to 1×1012Ω/□ and a three-point bending strength of 350 MPa or higher. ### Claim 12 (depends on 8) The image display panel according to claim 8, wherein the spacer has a surface electrical resistance of 1×108 to 1×1010Ω/□ and a three-point bending strength of 350 MPa or higher. ### Claim 13 (depends on 8) The image display panel according to claim 8, wherein the spacer comprises 0.5 to 10 wt % of a compound selected from the group consisting of Sb2O3, ZrO2, GeO2, Cr2O3, Nb2O5, Al2O3, Y2O3, MgO, ErO2, CaO, and TiO2. ### Claim 14 (depends on 8) The image display panel according to claim 8, wherein the spacer comprises an alkali metal element of 0.5 wt % or lower in terms of oxide (R2O). ### Claim 15 A display comprising: a back panel including an insulating substrate, a plurality of scanning lines provided for a main surface of the insulating substrate, extending in a first direction, and arranged in a second direction intersecting with the first direction, a plurality of signal lines extending in the second direction and arranged in the first direction, and an electronic source provided near the intersection of the scanning line and the signal line; a front panel including a transparent insulating substrate, a fluorescent material layer provided for a main surface of the transparent insulating substrate and forming a pair with each of the electronic sources, an anode; a sealing frame inserted into the inner periphery at ends of the back panel and the front panel disposed such that their main surfaces are opposed, to form a decompressed container together with the panels; and a spacer standing structure bonded between the back panel and the front panel and formed of a spacer which holds a gap at a predetermined value between the panels and an adhesion layer; wherein the spacer is formed of core glass and coat glass which covers a surface of the core glass; wherein the adhesion layer which directly bonds the spacer between the back panel and the front panel is formed of glass of the same type as that of the coat glass; and wherein at least one of (a) each of the coat glass and the adhesion layer includes vanadium and phosphorus, and (b) a diffusion layer is provided between the adhesion layer and the coat glass, the diffusion layer including the phosphorus, the content of the phosphorus being different from that of the adhesion layer or the coat glass. ### Claim 16 (depends on 15) The display according to claim 15, wherein the adhesion layer has a melting point lower than that of the coat glass. ### Claim 17 (depends on 15) The display according to claim 15, wherein the adhesion layer includes an electric conductive filler mixed therein. ### Claim 18 An image display comprising: a back substrate having a plurality of cathode electrodes and a plurality of electronic sources formed thereon; a front substrate having an anode electrode and a plurality of fluorescent materials opposed to the electronic sources; and a plurality of spacers which hold a gap between the front substrate and the back substrate, wherein the spacer is fixed to each of the back substrate and the front substrate with a bonding material, the spacer comprises glass having a composition of 25 to 40 wt % of WO3, 10 to 20 wt % of V2O5, 0 to 15 wt % of MoO3, 25 to 35 wt % of P2O5, and 10 to 20 wt % of BaO, and the bonding material comprises glass having a composition of 55 to 65 wt % of V2O5, 20 to 30 wt % of P2O5, 5 to 15 wt % of Sb2O3, 3 to 10 wt % of BaO, and 3 to 10 wt % of TeO2.