US20020176933A1 - Paste for transparent insulating film, plasma display panel, method of manufacturing paste, method of manufacturing transparent insulating film, and method of manufacturing plasma display panel - Google Patents

Paste for transparent insulating film, plasma display panel, method of manufacturing paste, method of manufacturing transparent insulating film, and method of manufacturing plasma display panel Download PDF

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Publication number
US20020176933A1
US20020176933A1 US10/011,352 US1135201A US2002176933A1 US 20020176933 A1 US20020176933 A1 US 20020176933A1 US 1135201 A US1135201 A US 1135201A US 2002176933 A1 US2002176933 A1 US 2002176933A1
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paste
insulating film
transparent insulating
manufacturing
oxide
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Tastuo Mifune
Tomohiro Hayashi
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Panasonic Holdings Corp
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Individual
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Assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. reassignment MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAYASHI, TOMOHIRO, MIFUNE, TASTUO
Publication of US20020176933A1 publication Critical patent/US20020176933A1/en
Priority to US10/422,109 priority Critical patent/US6875463B2/en
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • 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
    • C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
    • C03C8/16—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions with vehicle or suspending agents, e.g. slip
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • 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
    • C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2211/00—Plasma display panels with alternate current induction of the discharge, e.g. AC-PDPs
    • H01J2211/20—Constructional details
    • H01J2211/34—Vessels, containers or parts thereof, e.g. substrates
    • H01J2211/38—Dielectric or insulating layers

Definitions

  • the present invention relates to paste for a transparent insulating film, a plasma display panel, a method of manufacturing paste, a method of manufacturing a transparent insulating film, and a method of manufacturing a plasma display panel.
  • FIG. 1 showing a structural diagram of a plasma display panel
  • the configuration of a conventional plasma display panel will be discussed.
  • the plasma display panel is constituted by scanning electrodes 1 , maintaining electrodes 2 , a black stripe 3 , a transparent insulating film 4 , an MgO film 5 , a phosphor 6 , a rib 7 , a ground surface dielectric 8 , and data electrodes 9 . Voltage is applied between the scanning electrodes 1 and the data electrodes 9 to discharge, and light emitted from the phosphor 6 passes through the transparent insulating film 4 and acts as image light.
  • Light can be emitted at a desired position of the phosphor (equivalent to a pixel) to obtain an image by selecting desired data electrodes 9 and scanning electrodes 1 and applying voltage.
  • the transparent insulating film 4 is about 50 ⁇ m in thickness and requires dielectric withstand voltage characteristics and optical characteristics. To be specific, dielectric withstand voltage can be obtained under a voltage of about AC 400V and an optical clouding degree (Hayes value, simply referred to as Hayes) is minimized.
  • dielectric withstand voltage can be obtained under a voltage of about AC 400V and an optical clouding degree (Hayes value, simply referred to as Hayes) is minimized.
  • a method of manufacturing a conventional transparent film will be discussed.
  • a conventional transparent insulating film is obtained as follows: paste is manufactured by using powder glass having D10 of 0.5 ⁇ m, D50 of 1.6 ⁇ m, and D90 of 3 ⁇ m, the paste is applied by screen printing and die coating with a thickness of 50 ⁇ m, and drying and firing are performed.
  • a transparent insulating film manufactured by such a method has a dielectric withstand voltage of a passing standard, large Hayes of about 30% appears.
  • the Hayes mainly depends upon a particle size of powder glass used as a material.
  • a plasma display having a transparent insulating film with large Hayes is configured as if an image was seen through ground glass. Hence, an image becomes less sharp.
  • the present invention is devised in view of the above conventional problems and has as its object the provision of paste for a transparent insulating film, a plasma display panel, a method of manufacturing paste, a method of manufacturing a transparent insulating film, and a method of manufacturing a plasma display panel that achieve more superior characteristics such as transmittance of light, Hayes, and dielectric withstand voltage.
  • the 1st invention of the present invention is Paste for a transparent insulating film of a plasma display panel, said paste including powder glass, which contains lead oxide, silicon oxide, boron oxide, barium oxide, and aluminum oxide, solvent, and resin.
  • the 2nd invention of the present invention is the paste for a transparent insulating film according to 1st invention, wherein said powder glass has a composition of boron oxide in 20 to 30 wt %, barium oxide in 15 to 20 wt %, and aluminum oxide in 3 to 6 wt %.
  • the 3rd invention of the present invention is the paste for a transparent insulating film according to 1st invention, wherein said powder glass contains copper oxide.
  • the 4th invention of the present invention is Paste for a transparent insulating film of a plasma display panel, said paste including powder glass, which contains bismuth oxide, silicon oxide, boron oxide, barium oxide, and aluminum oxide, solvent, and resin.
  • the 5th invention of the present invention is the paste for a transparent insulating film according to 4th invention, wherein said powder glass contains zinc oxide.
  • the 6th invention of the present invention is the paste for a transparent insulating film according to 4th or 5th inventions, wherein said powder glass has a composition of boron oxide in 20 to 30 wt %, barium oxide in 15 to 20 wt %, and aluminum oxide in 3 to 6 wt %.
  • the 7th invention of the present invention is the paste for a transparent insulating film according to 4th invention, wherein said powder glass contains copper oxide.
  • the 8th invention of the present invention is a plasma display panel, comprising:
  • said transparent insulating film is formed using the paste for a transparent insulating film according to 1st invention.
  • the 9th invention of the present invention is a plasma display panel, comprising:
  • said transparent insulating film is formed using the paste for a transparent insulating film according to 4th invention.
  • the 10th invention of the present invention is a method of manufacturing paste, comprising the steps of: storing powder glass, solvent, and resin in a storage section; and
  • the 11th invention of the present invention is the method of manufacturing paste according to 10th invention, wherein said powder glass has a dispersed particle size such that D10 is 0.4 to 0.6 ⁇ m, D50 is 0.8 to 1.2 Jm, and D90 is 1.4 to 1.8 ⁇ m.
  • the 12th invention of the present invention is the method of manufacturing paste according to 10th invention, wherein said powder glass has a dispersed particle size such that D10 is 0.2 to 0.8 ⁇ m, D50 is 1.0 to 2.0 ⁇ m, and D90 is 2.5 to 4.0 ⁇ m.
  • the 13th invention of the present invention is a method of manufacturing paste, comprising the steps of:
  • the 14th invention of the present invention is the method of manufacturing paste according to 13th invention, wherein said powder glass has a dispersed particle size such that D10 is 0.4 to 0.6 ⁇ m, D50 is 0.8 to 1.2 ⁇ m, and D90 is 1.4 to 1.8 ⁇ m.
  • the 15th invention of the present invention is a method of manufacturing paste, comprising the steps of:
  • the 16th invention of the present invention is the method of manufacturing paste according to 15th invention, wherein said powder glass has a dispersed particle size such that D10 is 0.2 to 0.8 ⁇ m, D50 is 1.0 to 2.0 ⁇ m, and D90 is 2.5 to 4.0 ⁇ m.
  • the 17th invention of the present invention is a method of manufacturing a transparent insulating film, comprising the steps of:
  • the 18th invention of the present invention is a method of manufacturing a plasma display panel, comprising the steps of:
  • the 19th invention of the present invention is the method of manufacturing a plasma display panel according to 18th invention, wherein a scanning electrode formed by using said electrode pattern has b value of 5 or less.
  • solvent of the present invention may contain at least one of diethyl Carbitol, Carbitol acetate, butyl Carbitol acetate, ⁇ -terpineol, and diethyl oxalate.
  • resin of the present invention may contain at least one of ethyl cellulose, nitrocellulose, and polyvinyl butyral.
  • powder glass may further contain lead oxide, boron oxide, and so on.
  • lead oxide glass has been used as a material composition of a conventional transparent insulating film. This is mainly because lead oxide is excellent in flowability during a heating operation and a minute transparent film can be readily obtained with excellent transmittance of light and dielectric withstand voltage.
  • a transparent insulating film material Bismuth oxide boron monoxide glass or the like is applicable as a candidate material.
  • this material is influenced by the destruction of particles more than lead oxide glass when paste is manufactured, and dispersion is highly carried out.
  • the paste of the present invention which is highly dispersed using bismuth oxide boron monoxide glass without destroying particles, has a small environmental load as well as excellent transmittance of light and dielectric withstand voltage.
  • FIG. 1 is a structural diagram showing a plasma display
  • FIG. 2 is a sectional view showing the configuration of an agitator according to Embodiment 1 of the present invention
  • FIG. 3 is a sectional view showing the configuration of a sand mill according to Embodiment 2 of the present invention.
  • FIG. 4 ( a ) is an explanatory drawing showing a particle size distribution of powder
  • FIG. 4( b ) is an explanatory drawing showing a particle size distribution of paste manufactured by the conventional method
  • FIG. 4( c ) is an explanatory drawing showing a particle size distribution of paste manufactured by a method of the present invention
  • FIG. 5 is an explanatory drawing showing a method of manufacturing paste according to Embodiment 3 of the present invention.
  • FIG. 6 is an explanatory drawing showing a method of manufacturing paste according to Embodiment 4 of the present invention.
  • Powder glass having a softening point of 590° C. was used when D10 was 0.5 ⁇ m, D50 was 1.7 ⁇ m and D90 was about 3.5 ⁇ m.
  • the powder glass was mainly composed of lead oxide, boron oxide, and silicon oxide.
  • the powder glass and butyl Carbitol acetate solvent, in which ethyl cellulose had been melted in advance, were mixed by a mixer. Dispersion was performed by a three-roll disperser and pasting was carried out.
  • the paste was diluted with butyl Carbitol acetate, and a dispersed particle size was measured by a laser particle size distribution analyzer. As a result, it was found that D10 was 0.5 ⁇ m, D50 was 1.7 ⁇ m, and D90 was 3.5 ⁇ m and powder glass was dispersed to a first particle level.
  • the paste was applied by screen printing and was fired at 600° C. at maximum after being dried. Thus, a transparent insulating film was formed.
  • the transparent insulating film which was obtained by the above method with a thickness of 50 ⁇ m, had dielectric withstand voltage of AC400V or more, the used powder glass was large in particle size. Therefore, a film had a low filling density, a Hayes value was 40%, and optical characteristics were rejected (see Experiment 1 of Table 1).
  • Powder glass was mixed with solvent, in which resin had been melted in advance, by a mixer.
  • a material component of powder glass, resin, and a material component of solvent were the same as those of Comparative Example 1.
  • a particle size distribution is also equal to that of Comparative Example 1.
  • a composition ratio of powder glass, resin, and solvent was 60%, 5%, and 35%. The mixed powder and solvent were put in an agitator of FIG. 2 and stirring was carried out.
  • the agitator was composed of a stirring blade (plate) 10 and a vessel (storage section) 11 . Shearing force is applied to the paste 12 by rotating the stirring blade 10 at high speed so as to perform stirring and dispersion.
  • a treating amount was set at 200 ml per batch.
  • Table 2 shows the relationship between a peripheral speed of the stirring blade 10 and treating time, a dispersed particle size, and a Hayes value.
  • the resin contains at least one of ethyl cellulose, nitrocellulose, and polyvinyl butyral, the same results were obtained.
  • a composition ratio of powder glass, resin, and solvent was 60%, 5%, and 35%.
  • the mixed powder and solvent were put in a sand mill of FIG. 3 to perform dispersion.
  • the sand mill was composed of a rotor (sand mill) 13 , a vessel (sand mill storage section) 14 , beads 14 , and paste 16 .
  • the beads 15 were moved by rotating the rotor 13 at high speed, and impact was applied to the paste 16 to perform dispersion.
  • a treating amount was set at 200 ml per batch.
  • Table 3 shows the relationship between a peripheral speed of the rotor 13 and treating time, a dispersed particle size, and a Hayes value.
  • Peripheral Peripheral Peripheral speed 5 m/s speed: 10 m/s speed: 15 m/s Powder glass particle
  • D10:0.5 D10:0.5 D10:0.5 size ( ⁇ m) D50:1.0 D50:1.0 D50:1.0 D90:1.5 D90:1.5 D90:1.5
  • Table 3 shows the relationship between a peripheral speed of the rotor 13 and treating time, a dispersed particle size, and a Hayes value.
  • Peripheral Peripheral Peripheral speed 5 m/s speed: 10 m/s speed:
  • Powder glass was pre-mixed with solvent, in which resin had been melted in advance, by a mixer to manufacture paste.
  • a material of powder glass, resin, and a material of solvent powder glass having at least bismuth oxide, boron oxide, and silicon oxide as main components, ethyl cellulose, and Carbitol acetate were used respectively. Further, the powder glass had particle size distribution such that D10 was 0.4 ⁇ m, D50 was 1.5 ⁇ m, and D90 was 3.0 ⁇ m.
  • a composition ratio of the powder glass, resin, and solvent was 60%, 5%, and 35%.
  • the paste may contain powder glass having at least lead oxide, boron oxide, and silicon oxide as main components.
  • paste 112 after mixing was put in a vessel (storage section) 111 of a manufacturing device of paste in FIG. 5, and dispersion was carried out.
  • the manufacturing device of paste was composed of a disc-shaped stirring blade (plate) 110 , and a vessel 111 .
  • the stirring blade 110 was disposed in the vessel 111 substantially in parallel with the bottom of the vessel 111 , and the stirring blade 110 was rotated on the surface where the it was disposed.
  • the vessel had the following dimensions: the stirring blade 110 was, for example, 75 mm ⁇ in diameter and the vessel 111 was, for example, 80 mm ⁇ in internal diameter.
  • Table 4 shows the relationship between a peripheral speed of the stirring blade 110 and treating time, a dispersed particle size, and a Hayes value.
  • the stirred paste was applied by screen printing and was fired at 600° C. at maximum after being dried. Thus, a transparent insulating film was formed.
  • dielectric withstand voltage of the transparent insulating film which was obtained with a thickness of 40 ⁇ m by the above method, was evaluated, dielectric withstand voltage was AC600V or more, which reached a passing standard. Namely, sufficient dielectric withstand voltage was provided for driving a PDP panel in practical use.
  • Powder glass was pre-mixed with solvent, in which resin had been melted in advance, by a mixer to manufacture paste.
  • a material of powder glass, resin, and a material of solvent powder glass having at least bismuth oxide, boron oxide, and siliconoxide as main components, ethyl cellulose, and Carbitol acetate were used respectively. Further, the powder glass had a particle size distribution such that D10 was 0.4 ⁇ m, D50 was 1.5 ⁇ m, and D90 was 3.0 ⁇ m.
  • a composition ratio of the powder glass, resin, and solvent was 60%, 5%, and 35%.
  • the paste may contain powder glass having at least lead oxide, boron oxide, and silicon oxide as main components.
  • the manufacturing device of paste has a double cylinder configuration, which was composed of an outer cylinder with slits (cylinder) 113 , an internal cylinder 114 , and a vessel 115 .
  • the slits on the outer cylinder 113 were disposed on the side of the cylindrical outer cylinder with slits 113 substantially in parallel with an axis of the outer cylinder with slits 113 .
  • the bottom of the outer cylinder with slits 113 was disposed in the internal cylinder 114 substantially in parallel with the bottom of the internal cylinder 114 .
  • the outer cylinder with slits 113 was rotated at a disposed position while its axis substantially serves as a rotating axis.
  • shearing force was applied to the paste 116 by rotating the outer cylinder with slits 113 at high speed to perform dispersion.
  • a treating amount was set at, for example, 400 ml per batch.
  • the dimensions of the vessel were as follows: the internal cylinder 114 was, for example, 30 mm ⁇ in diameter and the vessel 115 was, for example, 50 mm ⁇ in internal diameter.
  • Table 5 shows the relationship between a peripheral speed of the outer cylinder with slits and treating time, a dispersed particle size, and a Hayes value.
  • Peripheral Peripheral Peripheral speed 15 m/s speed: 20 m/s speed: 30 m/s Powder glass particle D10:0.4 D10:0.4 D10:0.4 size ( ⁇ m) D50:1.5 D50:1.5 D50:1.5 D90:3.0 D90:3.0 D90:3.0 D90:3.0
  • D90:3.0 After three-minute D10:0.8 D10:0.4 D10:0.4 treatment D50:1.8 D50:1.5 D50:1.5 D90:4.3 D90:3.0 D90:3.0 D90:3.0
  • stirred paste was applied by screen printing and was fired at 600° C. at maximum after being dried. Thus, a transparent insulating film was formed.
  • the dielectric withstand voltage was evaluated regarding the transparent insulating film, which was obtained with a thickness of 40 ⁇ m by the above method, the dielectric withstand voltage was AC600V or more, which reached a passing standard. Further, Hayes (clouding degree) of optical characteristics as measured by the method according to JIS K 7361.
  • a scanning electrode formed by the paste according to the above-embodiments containing powder glass, solvent, and resin, the powder glass having at least bismuth oxide, boron oxide, and silicon oxide as main components b value indicative of chromaticity of yellow was 5 or less.
  • a plasma display panel having such scanning electrodes could advantageously provide a less yellowish image as compared with a plasma display panel having scanning electrodes, which were formed by paste containing powder glass having the conventional bismuth oxide and the like as main components.
  • b value was 10 or more. Further, such coloring of yellow was relatively disadvantageous when a scanning electrode was an Ag electrode but was hardly advantageous when a scanning electrode was a Cu—Cr electrode.
  • lead oxide powder glass which contains lead oxide, silicon oxide, boron oxide, barium oxide, and aluminum oxide, solvent (butyl Carbitol acetate solvent) , and resin (ethyl cellulose) were used to prepare paste for a transparent insulating film.
  • Table 6 shows a specific glass composition, a method of manufacturing paste, and film characteristics.
  • composition 1 Glass composition Lead oxide 62 wt % 62 wt % Silicon oxide in total in total Zinc oxide — — Boron oxide 20 wt % 20 wt % Barium oxide 15 wt % 15 wt % Aluminum oxide 3 wt % 3 wt % Calcium oxide — — Magnesium oxide — — Conventional Invented Method of manufacturing paste method method Film characteristics Film thickness 30 ⁇ m 30 ⁇ m Determination of total light 92% 92% transmittance ⁇ ⁇ Determination of Hayes 13% 13% ⁇ ⁇ Determination of dielectric AC 600 V AC 600 V withstand voltage ⁇ ⁇ Determination of coloring 7 3 ⁇ ⁇ ⁇
  • such a transparent insulating film requires the following practical characteristics: a film thickness of 30 to 40 ⁇ m, total light transmittance of 85% or more, Hayes of 15% or less, dielectric withstand voltage of AV500V, b value of coloring, that is, chromaticity of about 8 or less (preferable at 5 or less) on a surface of an Ag electrode.
  • composition 1 Glass composition Lead oxide 65 wt % 70 wt % Silicon oxide 25 wt % 28 wt % Zinc oxide — — Boron oxide 5 wt % — Barium oxide — Aluminum oxide — — Calcium oxide 5 wt % — Magnesium oxide — 2 wt % Conventional Conventional Method of manufacturing paste method method Film characteristics Film thickness 30 ⁇ m 30 ⁇ m Determination of total light 80% 83% transmittance X X Determination of Hayes 30% 20% X X Determination of dielectric AC 400 V AC 360 V withstand voltage X X Determination of coloring 6 7 ⁇ ⁇
  • lead oxide powder glass containing lead oxide, silicon oxide, boron oxide, barium oxide, and aluminum oxide, solvent, and resin were used to prepare paste for a transparent insulating film.
  • compositions of lead oxide, silicon oxide, boron oxide, barium oxide, and aluminum oxide were changed in various ways, and an invented method (method of manufacturing paste of the above-mentioned Embodiment 4) was used as a method of manufacturing paste.
  • Table 8 specifically shows a glass composition, a method of manufacturing paste, and film characteristics.
  • non-lead oxide powder glass (glass frit) containing bismuth oxide, silicon oxide, zinc oxide, boron oxide, barium oxide, and aluminum oxide, solvent (butyl Carbitol acetate solvent), and resin (ethyl cellulose) were used to prepare paste for a transparent insulating film.
  • the present embodiment is characterized in that bismuth oxide was used instead of lead oxide of the above-mentioned Embodiments 5 and 6 in view of environmental cohabitation.
  • zinc oxide is not absolutely necessary, the inventor confirmed by experiments that more desirable results were obtained by using zinc oxide.
  • Table 9 specifically shows a glass composition, a method of manufacturing paste, and film characteristics.
  • composition 6 Glass composition Bismuth oxide 62 wt % 62 wt % Silicon oxide in total in total Zinc oxide Boron oxide 20 wt % 20 wt % Barium oxide 15 wt % 15 wt % Aluminum oxide 3 wt % 3 wt % Calcium oxide — — Magnesium oxide — — Conventional Invented Method of manufacturing paste method method Film characteristics Film thickness 30 ⁇ m 30 ⁇ m Determination of total light 92% 92% transmittance ⁇ ⁇ Determination of Hayes 13% 13% ⁇ ⁇ Determination of dielectric AC 600 V AC 600 V withstand voltage ⁇ ⁇ Determination of coloring 8 4 ⁇ ⁇ ⁇
  • composition 4 Glass composition Bismuth oxide 65 wt % 70 wt % Silicon oxide 20 wt % 27 wt % Zinc oxide — — Boron oxide 10 wt % — Barium oxide — Aluminum oxide — — Calcium oxide 5 wt % — Magnesium oxide — 3 wt % Conventional Conventional Method of manufacturing paste method method Film charactareistics Film thickness 30 ⁇ m 30 ⁇ m Determination of total light 80% 83% transmittance X X Determination of Hayes 30% 20% X X Determination of dielectric AC 400 V AC 360 V withstand voltage X X Determination of coloring 6 7 ⁇ ⁇
  • non-lead oxide powder glass containing bismuth oxide, silicon oxide, zinc oxide, boron oxide, barium oxide, and aluminum oxide, solvent, and resin were used to prepare paste for a transparent insulating film.
  • compositions of bismuth oxide, silicon oxide, zinc oxide, boron oxide, barium oxide, and aluminum oxide are changed in various ways, and the invented method (method of manufacturing paste in the above-mentioned Embodiment 4) was used as a method of manufacturing paste.
  • Table 11 specifically shows a glass composition, a method of manufacturing paste, and film characteristics.
  • composition 7 composition 8 composition 9 composition 10
  • the method of manufacturing paste of the above-mentioned Embodiment 4 was used as a method of manufacturing paste.
  • An applicable method is not limited to the above. It is surely possible to obtain desirable film characteristics even when the methods of manufacturing paste of Embodiments 1 to 3 are used.
  • the powder glass of the present invention may contain copper oxide. It is possible to suppress the above coloring of yellow and so on by applying copper oxide of about 0.1 to 1 wt % to powder glass.
  • the present invention offers an advantage in that paste for a transparent insulating film can be provided while achieving better characteristics regarding transmittance of light, hayes, and dielectric withstand voltage.

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US10/011,352 2000-12-05 2001-12-05 Paste for transparent insulating film, plasma display panel, method of manufacturing paste, method of manufacturing transparent insulating film, and method of manufacturing plasma display panel Abandoned US20020176933A1 (en)

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US7699999B2 (en) * 2003-11-13 2010-04-20 E.I. Du Pont De Nemours And Company Thick film getter paste compositions for use in moisture control
US20100102269A1 (en) * 2003-11-13 2010-04-29 E. I. Du Pont De Nemours And Company Thick Film Getter Paste Compositions for Use in Moisture Control
US7943059B2 (en) 2003-11-13 2011-05-17 E. I. Du Pont De Nemours And Company Thick film getter paste compositions for use in moisture control
US20090263587A1 (en) * 2005-07-18 2009-10-22 E. I. Du Pont De Nemours And Company Thick film getter paste compositions with pre-hydrated desiccant for use in atmosphere control
US7691288B2 (en) * 2005-07-18 2010-04-06 E.I. Du Pont De Nemours And Company Thick film getter paste compositions with pre-hydrated desiccant for use in atmosphere control

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US20030207024A1 (en) 2003-11-06

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