Controlled atmosphere when sintering a frit to a glass plate
First Claim
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1. A method for sintering a frit to a glass plate, said method comprising the steps of:
- providing the glass plate;
depositing a frit onto the glass plate;
placing the glass plate with the deposited frit into an oven;
sintering the frit to the glass plate within the oven by;
ramping-up a temperature within the oven to a predetermined temperature, where the predetermined temperature is higher than a glass transition temperature (Tg) of a glass within the frit but less than a crystallization temperature of the glass in the frit;
holding the predetermined temperature within the oven for a predetermined time; and
maintaining an oxygen level within the oven at a predetermined level within a range of about 1,200 ppm-22,220 ppm while holding the predetermined temperature within the oven for the predetermined time; and
ramping-down a temperature within the oven; and
removing the glass plate with the sintered frit from the oven.
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Abstract
A method is described herein for controlling the oxygen level within an oven while sintering a frit to a glass plate where the sintered frit and glass plate are subsequently sealed to another glass plate to form a sealed glass package. Examples of the sealed glass package include a light-emitting device (e.g., organic light emitting diode (OLED) device), a photovoltaic device, a food container, and a medicine container.
47 Citations
25 Claims
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1. A method for sintering a frit to a glass plate, said method comprising the steps of:
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providing the glass plate; depositing a frit onto the glass plate; placing the glass plate with the deposited frit into an oven; sintering the frit to the glass plate within the oven by; ramping-up a temperature within the oven to a predetermined temperature, where the predetermined temperature is higher than a glass transition temperature (Tg) of a glass within the frit but less than a crystallization temperature of the glass in the frit; holding the predetermined temperature within the oven for a predetermined time; and maintaining an oxygen level within the oven at a predetermined level within a range of about 1,200 ppm-22,220 ppm while holding the predetermined temperature within the oven for the predetermined time; and ramping-down a temperature within the oven; and removing the glass plate with the sintered frit from the oven. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for sealing a glass package, said method comprising the steps of:
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providing a first glass plate and a second glass plate; depositing a frit onto the first glass plate, where the frit includes a glass, a filler and a dispersant vehicle; placing the first glass plate with the deposited frit into an oven; sintering the frit to the first glass plate within the oven by; ramping-up a temperature within the oven from a first temperature to a second temperature by a first ramp rate with a predetermined temperature/predetermined time; holding the second temperature within the oven for a predetermined time, where the second temperature is high enough to volatize organic ingredients within the dispersant vehicle in the frit but not higher than a glass transition temperature (Tg) of the glass in the frit; ramping-up a temperature within the oven from the second temperature to a third temperature by a second ramp rate with a predetermined temperature/predetermined time; holding the third temperature within the oven for a predetermined time, where the third temperature is higher than the glass transition temperature (Tg) of the glass in the frit but less than a crystallization temperature of the glass in the frit; maintaining an oxygen level within the oven at a predetermined level within a range of about 1,200 ppm-22,220 ppm while holding the third temperature within the oven for the predetermined time; ramping-down a temperature within the oven from the third temperature to a fourth temperature by a third ramp rate with a predetermined temperature/predetermined time; ramping-down a temperature within the oven from the fourth temperature to a fifth temperature by a fourth ramp rate with a predetermined temperature/predetermined time; and removing the first glass plate with the frit from the oven; placing the second glass plate on the frit attached to the first glass plate; and using a sealing device at a predetermined sealing power to heat the frit such that the frit melts and forms a seal which connects the first glass plate to the second glass plate. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25)
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24. A sealed glass package comprising:
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a first glass plate; and a second glass plate, wherein the first glass plate and the second glass plate are connected to one another by a transition metal-lanthanide doped glass frit which formed a seal between the first glass plate and the second glass plate, wherein the transition metal-lanthanide doped glass frit has a predetermined color and desired oxidation state due to a using an 1,200 ppm-22,220 ppm oxygen controlled sintering process which was performed to attach the transition metal-lanthanide doped glass frit to the first glass plate before the second glass plate was placed on top of the sintered transition metal-lanthanide doped glass frit and the sintered transition metal-lanthanide doped glass frit was melted to form the seal between the first glass plate and the second glass plate.
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Specification