Frit sealing of large device

摘要

A hermetically sealed device comprising a spacing unit and a resistive heating element desirably having a closed-loop structure and process for hermetically sealing a device by using such heating element and spacing unit. The frit can form multiple closed-loops to prevent crack propagation. The heating element can be advantageously made of a metal such as Invar® and/or Kovar®. The invention enables hermetic frit sealing with low residual stress in the seal for large-area displays. The invention is particularly advantageous for hermetic sealing of OLED display devices having a large area, such as those above 10 inches (25 cm).