An experimental study was carried out to measure the boiling heat transfer and critical heat flux on serpentine-pattern thin film heater having a 120 nm thick platinum under pool boiling. Pool boiling critical heat flux experiments were performed using plain heater, 2-serpentine, 4-serpentine, and 6-serpentine pattern thin film heater. From the experimental results, it is found that the measured boiling heat transfer performance and critical heat flux are dependent of serpentine pattern, however critical heat flux is independent of the number of serpentine pattern. Measured data of critical heat flux are compared with classical model of critical heat flux, and degradation phenomena of boiling heat transfer and critical heat flux on serpentine-pattern thin film heater under pool boiling analyzed in this work. (C) 2015 Elsevier Ltd. All rights reserved.