Patent ID: 9485807
Filing Date: 2016-11-01
CPC Classification: F24H,H05B

Claim Text:
1. A liquid heating apparatus for heating a liquid sulfuric acid solution including a peroxosulfuric acid for use in cleaning a semiconductor, comprising: a liquid flow channel member forming a flow channel defining a passage through which the liquid flows and having a flow channel thickness of 10 mm or smaller, with the liquid flow channel member consisting solely of a radiation transparent quartz composition to transmit near-infrared rays in a heating zone from a near-infrared heater placed over the outside of at least one of opposite flow channel surfaces of the liquid flow channel member for heating the liquid in the flow channel; and at least one spacer placed within the quartz flow channel of thickness of 10 mm or smaller to reduce the volume of the flow channel, wherein each spacer is composed only of radiation transparent quartz, which transmits near-infrared rays, in a rod shaped configuration disposed along the liquid flowing direction and arranged in a row relative to one another within the flow channel.