| 摘要 |
A glass sealed body, wherein a residual stress is desirably small, and the stress is controlled precisely, is provided, and magnetic heads, plasma display panels, semiconductor sensors, and optical devices of high production yield, high reliability, and high performance are obtained. The glass sealed body comprises a sealing glass (1) and a substrate (2), and has a relationship expressed by the equation, R1 < R2, where, R1 is a retardation of the glass portion, and R2 is a retardation of the glass portion after re-heating and cooling to room temperature by an average cooling velocity of utmost 20 DEG C/minute. <IMAGE> |
