Substrate processing apparatus and substrate processing method

A substrate processing method, comprising:

• storing, in a processing tub, a processing liquid in which multiple substrates are to be immersed;
• supplying the processing liquid to an inside of a water tank of the processing tub by multiple liquid supplies including a first supply line and a second supply line;
• heating the processing liquid at a portion of the first supply line via a first heating device and the second supply line via a second heating device;
• and
• measuring a temperature of the processing liquid at multiple positions within the water tank of the processing tub by multiple in-tank temperature sensors and calculating a distribution of an in-tank temperature,
• wherein the inside of the water tank of the processing tub is divided into multiple zones, the multiple zones are arranged in an arrangement direction of the multiple substrates, and the multiple liquid supplies are arranged to discharge the processing liquid into the multiple zones, respectively, and
• one or more of the in-tank temperature sensors are disposed in each of the multiple zones which are arranged in the arrangement direction of the multiple substrates,
• wherein the arrangement direction is a direction in which the multiple substrates are arranged in the processing tub,
• wherein the multiple zones include a first zone and a second zone, the first zone including a first group of the multiple substrates and the second zone including a second group of the multiple substrates,
• wherein the first zone includes a first processing condition and the second zone includes a second processing condition, the first and second processing conditions being different and individually controlled.