Frit-containing pastes for producing sintered frit patterns on glass sheets
AssigneeCorning Incorporated
InventorsJohn W Botelho, Edward Arthur Cuellar, Michelle Nicole Haase Pastel, Lu Zhang
Life of this patent
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Abstract
Pastes for use in producing sintered frit patterns (14) on glass sheets (12), such as the glass sheets used as covers for OLED (18) display devices (10), are provided. The pastes include glass particles, filler particles, and a vehicle. The sizes of the filler and/or glass particles are reduced compared to prior art pastes. Reductions in porosity and surface roughness of sintered frits produced using the pastes, as well as improvements in the available process window for producing OLED packages and the hermeticity and strength of those packages, are reported.
Claims15
A paste for use in forming a sintered frit pattern on a major surface of a glass sheet comprising:
- (a) a population of glass particles which melt upon sintering;
- (b) a population of filler particles which substantially maintain their shapes and sizes upon sintering;
- and
- (c) a vehicle which is capable of combusting and/or volatilizing upon sintering;
- wherein, when analyzed by dynamic light scattering, (i) the population of glass particles has a median particle size in the range of 0.5-1.5 microns, and (ii) at least 90% of the glass particles have a particle size that is less than or equal to 5.0 microns.
A paste for use in forming a sintered frit pattern on a major surface of a glass sheet comprising:
- (a) a population of glass particles which melt upon sintering;
- (b) a population of filler particles which substantially maintain their shapes and sizes upon sintering;
- and
- (c) a vehicle which is capable of combusting and/or volatilizing upon sintering;
- wherein, when analyzed by dynamic light scattering, (i) the population of filler particles has a median particle size in the range of 2.5-3.5 microns, and (ii) at least 90% of the filler particles have a particle size that is less than or equal to 12 microns.
A paste for use in forming a sintered frit pattern having a nominal height H on a major surface of a glass sheet comprising:
- (a) a population of glass particles which melt upon sintering;
- (b) a population of filler particles which substantially maintain their shapes and sizes upon sintering;
- and
- (c) a vehicle which is capable of combusting and/or volatilizing upon sintering;
- wherein, when analyzed by dynamic light scattering, 100% of the paste's filler particles have a particle size that is less than H.
An assembly comprising a glass sheet having a major surface and a sintered frit pattern bonded to said major surface wherein the sintered frit pattern has an RMS surface roughness in the range of 1.0-2.0 microns, or a porosity in the range of 9-13%, or an RMS surface roughness in the range of 1.0-2.0 microns and a porosity in the range of 9-13%.
Dependencies are inferred from the claim text.