Patent ID: 10704320

Abstract:
A method of producing a vacuum insulated glazing (VIG) unit comprising providing substantially parallel glass panes, a plurality of pillars, and a peripheral seal between the glass panes; providing an evacuation hole in a first glass pane for evacuating a void to a reduced pressure; covering the evacuation hole with an evacuation head comprising a heating element, the evacuation head having substantially hermetic contact to the first glass pane; arranging the glass panes, the plurality of pillars, the peripheral seal, and the evacuation head in an oven; heating the oven according to a predetermined profile of oven temperatures T1 and compensating for a difference in temperature between the temperatures T1 and a temperature T2 under the evacuation head by activating the heating element to increase the temperature T2 to equal the temperature T1; evacuating the void through the evacuation head after completion of the heating; and sealing the evacuation hole.