Implementation of the RoHS directive and compliance implications for the PCB sector

摘要

Purpose - To present an overview of the current status of the RoHS directive and its implications for the printed circuit board (PCB) industry. Design/methodology/approach - A review paper detailing the requirements of the RoHS directive, the materials that are proscribed, where they are found and the impacts on PCB fabrication and assembly. Findings - The main implications of RoHS for the PCB industry are related to the proscription of lead and the move to lead-free assembly. Tin-lead HASL finished boards will no longer be allowed and new laminates may be needed to accommodate the higher soldering temperatures associated with lead-free assembly. There is growing pressure to move away from the use of brominated flame retardants, even though the standard materials used in FR4 type laminates are not proscribed. Research limitations/implications - Manufacturers need to be aware of the implications of the RoHS directive, not just in terms of compliance but also from a materials selection and reliability perspective. Originality/value - The paper details how the RoHS directive impacts PCB manufacturing and assembly and highlights the changes needed to enable reliable lead-free assembly within the context of legislative compliance. Actions necessary to ensure compliance are also detailed.