A METHOD FOR MANUFACTURING A CIRCUIT BOARD

摘要

PURPOSE: A method for manufacturing a circuit board is provided to prevent a short by uniformly supplying illuminance to the inner bottom of a cavity. CONSTITUTION: A processing block layer(120) is formed in an insulation layer(110). A circuit pattern(114) and a solder resist(112) are formed on the surface of the insulation layer. A cavity(130) is formed in the insulation layer. The processing block layer is removed by etching the cavity.