| 摘要 |
Provided is a manufacturing method for glass substrate in which there is minimal danger of contaminating the glass substrate by platinum impurities, and with which it is possible to produce high-quality glass substrates. This manufacturing method for glass substrate involves processing molten glass using a processing device having a gas phase space formed by an inner wall and a molten glass liquid level, and in which at least part of the inner wall which comes into contact with the gas-phase space comprises a material that contains a platinum-group metal. When treating molten glass in the region of the processing device that comes into contact with the gas-phase space, a high-temperature region and a low-temperature region having a lower temperature than the high-temperature region are formed, and on the outside of the processing device, a heat transfer medium is provided which supports the processing device and which transfers heat from the high-temperature region to the low-temperature region, and the heat transfer quantity of the heat transfer medium is adjusted in such a manner that the difference in temperature between the high-temperature region and the low-temperature region does not exceed a reference value. |
