| 摘要 |
<p>A glass layer (3) is melted by applying laser light having a first heat input quantity along a region intended for welding (R). The glass layer (3) is melted by switching the heat input quantity when the melting ratio of the glass layer (3) in the direction approximately orthogonal to the traveling direction of the laser light (L1) approaches 100% and applying the laser light having a second heat input quantity smaller than the first heat input quantity along the region intended for welding (R). Consequently, glass members are welded with the glass layer (3) interposed therebetween. When the glass layer (3) is melted, the laser light absorptance of the glass layer (3) sharply rises when the melting ratio of the glass layer (3) approaches 100%, but by the abovementioned switching of the heat input quantity, the glass layer (3) is prevented from getting into an excessive heat input state, and thus the occurrence of cracking in the glass members (4, 5) can be prevented.</p> |
