This thesis investigates whether geometry controlled bubble coalescence can measurably affect the boiling curve and the heat transfer coefficient (HTC) during saturated pool boiling of water at 1 atm on Si/SiO₂ chips. The experimental platform uses 20 × 20 mm², 380 µm thick silicon heaters with a hydrophilic SiO₂ top layer and nominally identical micro-cavities (diameter 75 µm). Three geometric degrees of freedom are isolated while keeping fluid, chemistry, and procedures fixed: intra-pair spacing C2C (300–1500 µm), inter-pair spacing P2P (3000–7000 µm), and cavity depth (5, 50, 100 µm). Quantitative boiling curves q″(ΔT) and HTC=h(ΔT) are reconstructed from electrical measurements; high-speed videos recorded at matching operating points provide regime-level interpretation.