Glass panel unit assembly and method for manufacturing glass panel unit

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.