Guide to IPC Standards for PCBs

This Gold Phoenix PCB Knowledge Center article provides a guide to IPC standards for printed circuit boards.

As manufacturers of printed circuit boards (PCBs) know, ensuring quality throughout the manufacturing process is critical and requires careful attention at all phases. Adhering to standards from the trade association IPC can help.

What Is IPC?

IPC is the trade association for the electronic interconnection industry. It provides standards for the assembly and protection of electronic equipment, as well as training, market research and public policy advocacy.

IPC is a member-driven organization and has more than 4,800 member companies around the world. Its members include companies in all aspects of the global electronics industry, including designers, suppliers, board manufacturers, assembly companies and original equipment manufacturers.

The organization got its start in 1957 as the Institute for Printed Circuits. It later changed its name to the Institute for Interconnecting and Packaging Electronic Circuits due to the expansion to packaging and electronic assemblies from bare boards. In 1999, it adopted the name IPC, with the tagline Association Connecting Electronics Industries.

IPC has its headquarters in Bannockburn, Ill., and has other offices around the United States and the world, including in India, China, Sweden and Russia.

The American National Standards Institute has accredited IPC as a standard-developing organization. IPC standards are the most widely recognized acceptability codes in the electronics industry. The organization publishes standards for nearly every phase of the electronic product development cycle, including design, purchasing, assembly, packaging and more. IPC currently has more than 300 active standards and more than 1,000 standards in its resource library.

Committees of volunteers from across the electronics industry draft, edit and vote on IPC standards. More than 3,000 industry professionals across the globe participate in this process. Committees can include people from around the world, as members can participate via in-person meetings, teleconference and email.

The association provides validation services programs, including a standards gap analysis that helps organizations address manufacturing issues and determine what they need to do to reach compliance with standards. It maintains a qualified manufacturers list and qualified products to help determine if a product complies with IPC standards.

There are more than 110 IPC-licensed training centers around the world. The organization also offers online and multimedia educational and training resources. It hosts educational events, as well as technical and management conferences including IPC APEX EXPO, which is the largest electronics manufacturing industry exhibition in North America, and APEX South China.

Additionally, the organization conducts market research and does work in government relations and environmental policy. IPC advocates for the electronics industry, with regulators around the world.

Why Do IPC Standards Matter?

Producing safe, reliable, high-performing PCB products requires persistent attention to detail and commitment to quality throughout the production process. Adhering to IPC standards throughout the process can help companies achieve that.

Just as the production processes for PCBs take a step-by-step approach, the IPC standards all build upon one another. You can implement an IPC standard for nearly every phase of production.

To achieve high-quality, reliable products that meet customer expectations, it is essential for companies involved in the production of PCBs and the products that use them to commit to quality through the use of IPC standards for printed circuit boards.

Complying with IPC standards can help a company improve its processes and products in numerous ways. Here are four of the leading benefits.

Improved Product Quality and Reliability

Adhering to IPC standards throughout the manufacturing process can help companies improve the quality and reliability of their products. Creating products that perform better and last longer will help make a company more competitive and more profitable, as well as improve customer satisfaction.

IPC standards can help improve processes and also increase consistency in products. Using IPC standards when inspecting PCBs and other products can ensure consistent quality.

Improved Communication

Adhering to IPC standards helps improve communication both internally and externally by ensuring everyone is using the same terminology and agrees on expectations. Internally, employees who speak the same language can collaborate and more easily make the changes needed to make improvements. IPC standards also improve communication with customers, supplier vendors, regulators and others. Using the same terminology can prevent miscommunication that can lead to production delays and inconsistencies and, potentially, unhappy customers.

Reduced Costs

The improvements that result from using IPC standards can help reduce costs. Improving quality and minimizing miscommunications diminishes the likelihood of delays and reworks. IPC standards can also allow companies to minimize resource use and increase efficiency.

Improved Reputation and New Opportunities

Adhering to internationally recognized standards like those from IPC gives a company instant credibility. Even if someone knows nothing about your business, when they see you follow IPC standards, they can rest assured of your commitment to quality. IPC standards will enhance the quality of your products, improving your reputation. Ultimately, following these standards will help attract customers, open the door to new opportunities and make you more competitive.

Terminology You Should Know

To help users understand and work with its standards, IPC provides definitions of terms it uses. This common terminology can also help make communication more accurate and efficient across the industry. Here are a few examples of the kinds of terms you may want to know.

IPC defines three classes of electronic products:

• Class 1 – General electronic products: Class 1 products are for applications in which the primary requirement is the function of the completed assembly. This class includes most typical everyday products.

• Class 2 – Dedicated service electronic products: Class 2 products must have high reliability and extended life. Uninterrupted service is preferable, but not critical. The use environment of the product typically would not cause failures.

• Class 3 – High-performance electronic products: Class 3 products must provide continued performance or performance on demand. There can be no equipment downtime, and the end-use environment may be exceptionally harsh. The equipment must function when required. This category includes critical systems such as life support systems.

Here are some other terms you may want to know:

• Acceptance tests: The tests required to determine whether a product is acceptable, as agreed upon by the purchaser and vendor.

• Assembly: Several parts, subassemblies or combinations thereof joined together.

• Resist: A coating material used to mask or protect certain areas of a pattern during manufacturing or testing from the action of an etchant, plating, solder, etc.

• Integrated circuit: A combination of inseparable associated circuit elements formed in place and interconnected on or within a single base material to perform a microcircuit function.

• Flexural strength: The tensile strength of the outermost fiber of a material that must bend.

• Critical operation: One procedure of a total process that has a significant impact on the characteristics of the completed product.