How Stiffener Improve PCB Durability and Performance

A stiffener is a form of reinforcing component that is commonly added to a printed circuit board (PCB) to enhance its mechanical strength and rigidity. While simplistic in design and use, having a basic understanding on how stiffener find use in electronic design is crucial for ensuring the most reliable, high performing assembly. We will provide a basic overview of stiffener and their role in PCB construction in this blog, so read on for valuable insight that can aid you in the procurement process.

Understanding Stiffener and Their Design

Generally speaking, the exact design and installation method of a stiffener will often vary based on the specific application and the level of reinforcement required, with basic details provided below.

What Materials Are Used to Construct Stiffeners?

FR4 is a common material for stiffener due to its compatibility with PCB materials and its good mechanical properties, though other options are still popular. For example, aluminum offers higher strength and stiffness, at the cost of added weight. The stiffener's thickness and shape are also tailored to meet the specific needs of the PCB, ensuring a proper fit and reliable performance.

How Are Stiffeners Attached to a PCB?

Stiffeners can be secured to a PCB using various methods, the most common being the use of adhesives. This is because adhesive bonding offers a strong and uniform bond, which is highly reliable. Soldering can also be used for certain types of stiffeners, leading to a more permanent or long-term attachment. Lastly, mechanical fasteners like screws or rivets prove useful for applications requiring high strength and easy removal.

Why Stiffeners Are Used in PCB Construction

Enhancing Mechanical Strength

One of the primary uses of stiffener is to increase the mechanical strength and rigidity of a PCB, the component deterring bending or flexing forces in more delicate areas. This is particularly important for large PCBs or PCBs that are subjected to mechanical stress, reducing the chance of physical damage with increased durability.

Supporting Heavy Components

Stiffeners can provide additional support for heavy components that are mounted on a PCB, preventing them from stressing the board too much. This is important for ensuring the reliability of soldered connections when working with weaker boards.

Reducing Warpage

Stiffeners can also help to reduce the chance of warpage, an issue that occurs during the PCB manufacturing process or assembly. This ensures planarity, leading to a higher quality finished product.

Improved Performance

Stiffeners can improve the electrical performance of a PCB by reducing the amount of vibration it faces during operation, facilitating increased signal integrity and stability. This is particularly important in high-speed circuits.

Extended Lifespan

By protecting the PCB from mechanical stress and damage, stiffeners can extend its lifespan, as well as those of surrounding components, reducing the need for frequent repairs and replacements. This can drive down costs and time expenditures, furthering their benefit.

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When you are on the search for quality-assured PCB parts that have been sourced from a global network of trusted manufacturers and suppliers, look to Civil Aircraft Parts Hub. We are an ASAP Semiconductor website, offering access to a selection of 6 billion+ items. Currently, we feature a diverse Airbus aircraft parts miscellaneous parts list, which is replete with items like stiffener and more. All offerings can be found throughout curated catalogs that we have established, so begin exploring today.

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Customers can begin the procurement process at any time with our online Request for Quote (RFQ) forms, which are linked throughout our website. Simply fill out and submit a form through our website with details on your needs included, and a member of our staff will get in touch with you shortly after to present tailored options for your consideration. We can also be reached by phone or email, where we will be happy to discuss your needs and how we can meet them together.