US3781984A - Method for manufacturing electrodes of a display device utilizing gas discharge - Google Patents

Method for manufacturing electrodes of a display device utilizing gas discharge Download PDF

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Publication number
US3781984A
US3781984A US00269236A US3781984DA US3781984A US 3781984 A US3781984 A US 3781984A US 00269236 A US00269236 A US 00269236A US 3781984D A US3781984D A US 3781984DA US 3781984 A US3781984 A US 3781984A
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United States
Prior art keywords
electrodes
grooves
substrate
display device
manufacturing
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Expired - Lifetime
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US00269236A
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English (en)
Inventor
T Maeda
Y Shirouchi
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Fujitsu Ltd
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Fujitsu Ltd
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Publication date
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
    • Y10T29/49155—Manufacturing circuit on or in base

Definitions

  • an electrode pattern having a predetermined dimension is formed in grooves on the inside surface of the dielectric supporting substrate; second, metal paste for electrodes is inlaid in the above-mentioned grooves then, said metal paste inlaid in the grooves is baked, and then the electrodes are formed on the supporting substrate.
  • a display device utilizing gaseous discharge electrodes covered with dielectric layers are positioned opposite each other. Between them is a gap filled with gas capable of ionization. An alternating sustaining signal is applied between the electrodes facing each other, and the firing spots are produced when write pulses larger than the firing voltage are added to the sustaining signal. Wall charges corresponding to the polarity of the applied voltage are then formed. When the potential difference between the wall charges and the following sustaining voltage becomes larger than the firing voltage, the firing spot is again produced, and the polarity of the wall voltage is reversed. Accordingly, once the firing is produced, a sustaining voltage lower than the firing voltage can continuously produce the firing spot. That is, the write information is memorized as the wall voltage and the display can be carried out.
  • a gaseous discharge panel has become known in the art as the plasma panel", and when utilized for display purposes is commonly referred to as the plasma display panel.
  • the electrodes covered with dielectric layers are mainly manufactured by methods as shown below:
  • a first method is to apply a transparent electric conductive film on the substrate and finish this film with photo-etching;
  • a second method is to print a metal-paste with screen printing on the substrate
  • a third method is to vacuum evaporate a coating of metal on the substrate using a predetermined mask.
  • the resistivity of the electric conductive film is more than lOQ/cm.
  • this film is formed as a fine electrode having a width of I a, the value of its electric resistance becomes more than I kQ/cm. This distorts the waveform of the driving voltage of the electrode and as a consequence the method is not applicable to the electrodes of a display panel having dimensions larger than 2 inches 3 inches.
  • electrodes ordinarily having a width of 50 I00 p. must be printed for the purposes of increasing the light transparency and to conform to a specification with respect to the firing characteristics.
  • the thickness of the printed electrodes becomes smaller than 5 a.
  • the abovementioned electrodes are easily broken in the sintering process of the electrodes and in the following, sintering process of the applied dielectric layers. This produces dispersion in the case of manufacturing large size display panels. This is due to the facts that some parts of the metal paste are thickly printed and the other parts thinly printed.
  • the small absolute quantity of the paste causes insufficient adherence of the electrodes on the substrate, and in addition, the thermal expansion coefficients of the electrodes and the dielectric layers are considerably different.
  • the third method it is very difficult to manufacture precisely a large size mask of evaporation coating. Further the vacuum evaporation coating of the metal having a thickness larger than several micron for a large size panel is very expensive and is not applicable to mass production.
  • An object of the present invention is to provide a method of manufacturing the electrodes of a gaseous display panel which overcomes the above-mentioned drawbacks.
  • a further object of the present invention is to provide a method of manufacturing the electrodes of a gaseous display panel, in which the pattern of electrodes having widths of 50 u is engraved in grooves having a depth of the order of 5 30 p. on the substrate, the metal paste is coated into the above-mentioned grooves and is baked, whereby a low electric resistance and a uniform electric potential distribution in the electrodes is obtained.
  • FIG. 1 is a squint view illustrating the construction of a typical display panel utilizing a gas discharge
  • FIG. 2 is a sectional view illustrating the construction of a typical display panel utilizing a gas discharge shown in FIG. 1;
  • FIG. 3 is a schematic illustration of a supporting substrate of electrodes manufactured according to the method of the present invention.
  • FIG. 4 is a sectionally enlarged view of the supporting substrate of electrodes shown in FIG. 3.
  • a display device utilizing a gaseous discharge 1 has a pair of supporting substrates of electrodes 2 and 2a.
  • the supporting substrate 2 includes a group of electrodes 3 arranged in columns, which are parallel to a vertical axis; dielectric layer 4 covers the group of electrodes 3.
  • the supporting substrate 2a provides a group of electrodes 3a arranged in rows, which is parallel to a horizontal axis; dielectric layer 4a covers the group of electrodes 3a.
  • the supporting substrates of electrodes 2 and 2a are positioned in spaced parallel relation to the groups of electrodes 3 and 3a respectively. As shown in FIG. 2 these parallel rows and columns are separated from each other by a gap 5.
  • This gap 5 is filled with a rare gas having suitable pressure and capable of ionization.
  • each cross point of the electrodes in columns and row discharges into the gap 5 filled with an ionizable gas.
  • a wall charge is formed near the above-mentioned cross point in the dielectric layers 4 and 4a.
  • the above-mentioned discharge is carried out at a discharge point for display.
  • various constructions may be used for the display device utilizing gas discharge.
  • a device having cell spacers in the gap filled with a gas or a plate discharge type device which arranges the group of electrodes on the common plane substrate may be used. In the latter case the discharge is produced between the electrodes adjacent each other on the same plane substrate.
  • Self shift type devices having a function of selfshift of the discharge spot, may also be used.
  • FIG. 3 is a plan view of the supporting substrate of the present invention and FIG. 4 is a sectional view of the supporting substrate of electrodes shown in FIG. 3.
  • the supporting substrate 6 having the dimension of 440 X 380 X 10 mm is cleaned with chromic acid mixture and then washed with pure water and dried.
  • a photo-sensitive resin of synthetic rubber groups is coated on the substrate 6.
  • the pattern of electrodes having a width of 50 p. is exposed onto the substrate, and the substrate is developed.
  • the developed pattern is then etched about two minutes with an etchant composed of 46 percent solution of hydrofluoric acid, 12% normal solution by hydrochloric acid and water. The ratio of weight of these components is 100 3 20.
  • etched grooves with depth about 12 p. are formed on the substrate. These grooves are coated with gold paste for low temperature baking and the substrate is baked. As a result of this, the fine electrodes 7 are adhered to the substrate under the best conditions without causing disconnections.
  • solder glass ofa lead oxide-boric acid group is coated over the electrodes. This coating is then treated about thirty minutes with heat at 520C, and a flat dielectric layer 8 is obtained. During the treating process, neither diffusion nor disconnection are caused with respect to the fine electrodes.
  • the practical display panel provides two supporting substrates of electrodes which are positioned in spaced parallel relation having their inside surfaces opposite each other and separated by a gap filled with gas capable of ionization.
  • the discharge is produced between electrodes adjacent to each other on the same substrate on which a gap filled gas capable of ionization is provided.
  • gold paste was used for adhering the electrodes to the substrate, however, other pastes, having for example, silver, platinum or salladium as a main component can be applicable with similar effects.
  • metal pastes which include precious metals as a main component are applicable for the above-mentioned object.
  • sufficient result can not be obtained with a paste which includes rhodium.
  • Warp of the supporting substrate of electrodes can be considerably decreased.
  • tin oxide used as electrodes, considerable warp is caused when forming the thin film of tin oxide.
  • the warp of span becomes 50 300 ,u.
  • the warp is within :30 pt when a span having a dimension of 35 cm is used.
  • the thickness of the electrode layer is adjustable and, therefore, the electric resistance of the electrode layer can be selectively determined.
  • the method of the present invention can provide a larger adhesive area of the electrodes to the supporting substrate than other methods. The adherent strength therefore, becomes larger than other methods.
  • a dispersion in the widths of the electrodes is also not produced.
  • the manufacturing process is simple and is suited to a mass production.
  • a method of manufacturing a plasma display device or the like having at least one dielectric substrate on which an electrode arrangement is to be disposed comprising:
  • a method of manufacturing a component of a plasma display device or the like having at least one dielectric substrate comprising:
  • said paste of conductive metal is a precious metal from the following group: gold, silver, platinum, or palladium.
  • grooves have widths on the order 50-100 microns.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Gas-Filled Discharge Tubes (AREA)
US00269236A 1971-07-15 1972-07-05 Method for manufacturing electrodes of a display device utilizing gas discharge Expired - Lifetime US3781984A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46052104A JPS4827680A (de) 1971-07-15 1971-07-15

Publications (1)

Publication Number Publication Date
US3781984A true US3781984A (en) 1974-01-01

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Application Number Title Priority Date Filing Date
US00269236A Expired - Lifetime US3781984A (en) 1971-07-15 1972-07-05 Method for manufacturing electrodes of a display device utilizing gas discharge

Country Status (5)

Country Link
US (1) US3781984A (de)
JP (1) JPS4827680A (de)
DE (1) DE2234679C3 (de)
FR (1) FR2145681B1 (de)
GB (1) GB1396005A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081359A1 (de) * 1981-12-04 1983-06-15 BURROUGHS CORPORATION (a Delaware corporation) Verfahren zur Herstellung einer Elektrodenanordnung
EP0081360A1 (de) * 1981-12-04 1983-06-15 BURROUGHS CORPORATION (a Michigan corporation) Verfahren zur Herstellung einer Elektrodenzusammenstellung
WO1985000915A1 (en) * 1983-08-17 1985-02-28 Crystalvision Incorporated Liquid crystal display
EP0866487A1 (de) * 1997-03-18 1998-09-23 Corning Incorporated Verfahren zur Herstellung von elektronische - und Glasstrukturen auf Glassubstraten

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199076A1 (de) * 1985-03-28 1986-10-29 Siemens Aktiengesellschaft Verfahren zum Herstellen eines Kontaktrandes auf einem Leuchtschirm für flache Bildanzeigegeräte

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296359A (en) * 1964-12-31 1967-01-03 Texas Instruments Inc Dielectrics with conductive portions and method of making same
US3333334A (en) * 1963-10-23 1967-08-01 Rca Corp Method of making magnetic body with pattern of imbedded non-magnetic material
US3573948A (en) * 1968-01-29 1971-04-06 Ppg Industries Inc Methods of making an image plane plate

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333334A (en) * 1963-10-23 1967-08-01 Rca Corp Method of making magnetic body with pattern of imbedded non-magnetic material
US3296359A (en) * 1964-12-31 1967-01-03 Texas Instruments Inc Dielectrics with conductive portions and method of making same
US3573948A (en) * 1968-01-29 1971-04-06 Ppg Industries Inc Methods of making an image plane plate

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081359A1 (de) * 1981-12-04 1983-06-15 BURROUGHS CORPORATION (a Delaware corporation) Verfahren zur Herstellung einer Elektrodenanordnung
EP0081360A1 (de) * 1981-12-04 1983-06-15 BURROUGHS CORPORATION (a Michigan corporation) Verfahren zur Herstellung einer Elektrodenzusammenstellung
US4407934A (en) * 1981-12-04 1983-10-04 Burroughs Corporation Method of making an assembly of electrodes
WO1985000915A1 (en) * 1983-08-17 1985-02-28 Crystalvision Incorporated Liquid crystal display
EP0866487A1 (de) * 1997-03-18 1998-09-23 Corning Incorporated Verfahren zur Herstellung von elektronische - und Glasstrukturen auf Glassubstraten

Also Published As

Publication number Publication date
FR2145681A1 (de) 1973-02-23
DE2234679C3 (de) 1980-11-20
DE2234679B2 (de) 1975-05-15
FR2145681B1 (de) 1976-01-16
JPS4827680A (de) 1973-04-12
GB1396005A (en) 1975-05-29
DE2234679A1 (de) 1973-02-01

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