Patent ID: 9123715
Filing Date: 2015-09-01
Classification: C03C,H01L

Abstract:
1. A method of forming a glass envelope for an electronic or optoelectronic device comprising: traversing a closed path over a surface of a glass assembly comprising first and second glass plates with a laser beam to heat a frit disposed between the first and second glass plates during a sealing process, the first and second glass plates having a coefficient of thermal expansion equal to or greater than about 50×10 a) increasing a power of the laser beam from a first power at a location A to a second power at a location B downstream from location A relative to a direction of the traverse about the closed path; b) maintaining the laser beam at the second power while the laser beam completes traversing the closed path to location A; c) maintaining the laser beam at the second power while the laser beam continues to traverse downstream from locations A and B to a location C that is downstream from location B relative to the direction of traverse; and then d) decreasing a power of the laser beam from location C until the beam reaches a third power at location D, a predetermined distance downstream from location C relative to the direction of traverse, wherein the heating melts the frit and seals the glass assembly to form a glass envelope and an average temperature of the assembly is elevated above the ambient temperature during the sealing process, wherein the elevated average temperature is caused by a heat source other than the laser beam, and wherein the elevated assembly temperature is between about 65° C. and 85° C.