Glass panel unit assembly and method for manufacturing glass panel unit
A glass panel unit assembly includes: a pair of glass substrates arranged to face each other; a peripheral wall; a partition; an air passage; and an evacuation port. The peripheral wall has a frame shape and is disposed between the pair of glass substrates. The partition partitions an internal space, surrounded with the pair of glass substrates and the peripheral wall, into a first space and a second space. The air passage connects the first space and the second space together. The evacuation port connects the second space to an external environment. The partition is lower in height than the peripheral wall.
1. A method for manufacturing a glass panel unit, the method comprising an assembling step, a first melting step, an evacuation step, and a sealing step,
the assembling step including providing a glass panel unit assembly,
having a pair of glass substrates arranged to face each other; a peripheral wall having a frame shape and disposed between the pair of glass substrates; a partition provided to partition an internal space, surrounded with the pair of glass substrates and the peripheral wall, into a first space and a second space, the partition being lower in height than the peripheral wall; an air passage being formed by a gap between the partition and another partition or a gap between the partition and the peripheral wall, connecting the first space and the second space together; and an evacuation port connecting the second space to an external environment,
the first melting step including melting the peripheral wall to hermetically bond the pair of glass substrates,
the evacuation step including evacuating the first space through the air passage, the second space, and the evacuation port,
the sealing step including deforming the partition to close the air passage, and
in the first melting step, the partition comes into contact with the pair of glass substrates after the peripheral wall comes into contact with the pair of glass substrates.
2. The method of claim 1 , wherein
the assembling step includes a partition forming step of forming the partition by applying a material for the partition onto one of the pair of glass substrates using a dispenser,
the partition forming step including making the partition lower in height than the peripheral wall by applying, with a nozzle of the dispenser, pressing force to the material for the partition that has been discharged through the nozzle.
3. The method of claim 1 , wherein
the assembling step includes a peripheral wall forming step of forming the peripheral wall by applying a material for the peripheral wall onto one of the pair of glass substrates using a dispenser,
the peripheral wall forming step including applying, with a nozzle of the dispenser, no pressing force to the material for the peripheral wall that has been discharged through the nozzle.
4. The method of claim 1 , further comprising a removing step, wherein
the removing step includes removing a part including the second space to obtain a glass panel unit as a part including the first space.