Abstract: Topic: The purpose is to provide an oxygen and hydrogen mixed gas generator and a method for producing oxygen and hydrogen mixed gas stably by electrolyzing, and the resulting oxygen and hydrogen mixed gas thereto. Solution: an oxygen hydrogen mixed gas generator (1) is provided with an electrolyze device (10), wherein a first electrode (11) and a second electrode (12) are immersed in water for electrolyzing; and a power supply device (50), supplies the specified current to the first electrode (11) and the second electrode (12), the oxygen hydrogen mixed gas generator (1) mixes the oxygen and hydrogen generated from the electrodes to produce the oxygen hydrogen mixed gas, which is characterized in that the power supply device (50) reverses the polarity of the first electrode (11) and the second electrode (12) alternately.

Abstract: A method is disclosed for easily identifying an IC chip. A high-molecular film is formed on the surface of an IC chip, and the color of the film is changed by irradiating the film with a laser beam of a specified wavelength range. A molecular structure in the high-molecular film is caused to change by a laser beam, which in turn changes the color of the film. This property is used to mark various data and to identify an IC chip with a difference in film color between an irradiation area and a non-irradiation area of the laser beam.