Printed circuit board assembly

Printed circuit board assembly
Name	Printed circuit board assembly
Type	Manufacturing
Industry	Electronics

Printed circuit board assembly is the process of mounting and interconnecting electronic components on a printed circuit board. It combines assembly techniques, materials science, and quality management to produce functional modules for consumer electronics, aerospace systems, medical devices, and telecommunications equipment. The field intersects with supply chains, standards bodies, and automation providers that serve industries such as semiconductors, automotive, and defense.

Overview

Printed circuit board assembly spans procurement, placement, soldering, inspection, and testing steps governed by organizations like IPC (Association Connecting Electronics Industries), JEITA, UL (company), International Electrotechnical Commission, and Underwriters Laboratories. Major contract manufacturers such as Foxconn, Jabil, Flextronics, Benchmark Electronics, and Sanmina Corporation coordinate with original equipment manufacturers including Apple Inc., Samsung Electronics, Microsoft, Boeing, and Siemens to meet requirements from markets served by firms like Sony, LG Electronics, Panasonic, Nokia, Ericsson, Huawei, Cisco Systems, Intel, AMD (company), Qualcomm, NVIDIA, Texas Instruments, STMicroelectronics, Infineon Technologies, Broadcom Inc., Analog Devices, Renesas Electronics, Xilinx, and Microchip Technology. Supply-chain events such as disruptions in Taiwan and policy actions by United States Department of Commerce influence sourcing of raw materials and components, while trade agreements and standards from bodies like World Trade Organization and OECD shape cross-border manufacturing.

Materials and Components

PCBA materials include substrates produced by firms associated with commodity markets and chemical suppliers, and components sourced from distributors like Arrow Electronics, Avnet, TTI, Inc., and Mouser Electronics. Boards commonly use laminates from manufacturers with facilities in Japan, South Korea, China, and Germany; large material suppliers and chemical corporations such as Dow Inc., DuPont, BASF, Covestro, and Henkel provide resins, fluxes, and surface finishes. Component types encompass integrated circuits from Intel Corporation, Qualcomm, and NVIDIA Corporation; passive components by Murata Manufacturing, Vishay Intertechnology, Yageo Corporation, and TT Electronics; electromechanical parts by TE Connectivity, Amphenol, and Molex; and connectors from Hirose Electric and Samtec. Packaging, storage, and handling follow guidelines from National Institute of Standards and Technology and standards bodies including IPC and JEDEC Solid State Technology Association.

Assembly Processes

Assembly processes include PCB fabrication carried out by firms like TTM Technologies and Victory Giant Technology, stencil printing provided by equipment makers including DEK (equipment maker), component placement by machines from ASM Assembly Systems, Yamaha Motor Company (division), and Fuji Corporation, and soldering using reflow ovens manufactured by BTU International and Heller Industries. Wave soldering historically served through-hole assemblies; selective soldering and vapor phase reflow are applied for complex boards. Process control employs statistical methods advocated by institutions like American Society for Quality and testing strategies influenced by Institute of Electrical and Electronics Engineers committees.

Surface Mount Technology and Through-Hole Technology

Surface mount technology adoption was accelerated by companies such as Texas Instruments, Intel, Motorola, and IBM in collaboration with equipment makers like Philips and Siemens AG. Through-hole technology remains specified by aerospace and defense contractors such as Lockheed Martin, Northrop Grumman, and Raytheon Technologies for mechanical robustness. Hybrid assemblies integrate components from manufacturers like Analog Devices and Maxim Integrated and are qualified against military standards such as MIL-STD-883 and industrial specifications referenced by NASA and European Space Agency.

Inspection and Testing

Automated optical inspection equipment is produced by companies including Orbotech, Koh Young Technology, Nordson DAGE, and Camtek. X-ray and computed tomography inspection use systems from Nordson Corporation and specialized vendors serving medical and aerospace customers like GE Healthcare and Siemens Healthcare. In-circuit testing and functional testing employ test platforms from Teradyne, Advantest, Keysight Technologies, and National Instruments. Reliability prediction and failure analysis draw on techniques developed by laboratories at institutions such as Sandia National Laboratories, Lawrence Berkeley National Laboratory, and Georgia Institute of Technology.

Rework and Repair

Rework and repair procedures are performed using tools by Ersa GmbH, Metcal, and JBC Tools and follow processes mandated by certification bodies like IPC and NIOSH for worker safety. Repair services are provided by specialist firms working with customers such as Siemens Healthineers, Boeing Defense, and Thales Group. Failure analysis often involves collaborations with university research centers including MIT, Stanford University, University of Cambridge, ETH Zurich, and Tsinghua University to investigate root causes and improve design-for-manufacturing practices.

Quality Control and Standards

Quality control frameworks reference standards from IPC, ISO 9001, AS9100 for aerospace suppliers, IATF 16949 for automotive manufacturers, and electrical safety standards defined by Underwriters Laboratories and ETL Semko. Certification bodies such as Bureau Veritas, SGS, and Intertek audit facilities for compliance. Traceability systems integrate enterprise resource planning solutions from SAP SE, Oracle Corporation, and Microsoft Dynamics to manage bill of materials, lot tracking, and supplier qualification programs used by Ford Motor Company, General Motors, BMW, Toyota, and Volkswagen Group.

Category:Electronics manufacturing