As life science devices become smaller, the fluid path is often harder to control. That starts to become noticeable in the fluidic architecture. A layout that works in the lab can be difficult to scale when the device needs to become smaller, cleaner and easier to assemble.

Do you recognize these symptoms?

• Too many tubing connections in a limited footprint
• Manual fittings variety that reduces consistency
• Dead volume affecting fluid movement
• Cross-contamination concerns or cleaning effort
• Leakage risk across many connection points
• Servicing effort from hard-to-access routing
• Prototype layouts that are difficult to produce at scale

These are not just issues that impact the layout. They can affect cleanability, repeatability, serviceability and production readiness. A diffusion bonded manifold, however, can turn external routing into a compact fluid path inside a bonded plastic manifold.

Learn more about fluid-routing risks.

A diffusion bonded manifold is a compact polymer fluidic manifold made from precisely machined layers. Channel structures are created in the individual layers, which are then aligned and joined using heat and pressure. This creates precise internal fluid paths without needing adhesives for the bond line. The result is a bonded manifold that can route liquids or gases through a compact polymer block instead of relying only on external tubing, fittings and manual connections.

How the technology works:

• Machined layers: Fluid paths, chambers and interfaces are machined into plastic layers.
• Aligned channels: The layers are positioned so channels, ports and functional areas connect as planned.
• Bonded block: The layers are fused into one compact manifold structure using heat and pressure.
• Post-bond machining: Outer geometries and features are machined after the bonding process
• Assembly: Additional products can be assembled and tested to form functional sub-assemblies

This architecture can be relevant for microfluidics, diagnostics and IVD equipment, point-of-care devices, analytical instruments and lab automation where space, routing clarity and quality count.

A diffusion bonded manifold gives you more freedom to design compact, structured fluid paths where space, routing clarity and quality are important.

It can support designs that need:

• Fewer external connections and fittings
• A compact fluid path inside the device
• Lower dead volume and fewer trapped bubbles
• More repeatable assembly steps
• Routing that integrates selected components or interfaces

The right architecture depends on the media, material compatibility, channel complexity, production volumes and the level of integration you need. Explore the first comparison points in our blog.

A bonded manifold project starts with by asking the right technical questions. Festo helps you review the application, the fluidic architecture, material needs and the integration options before the real design work begins. For projects with medical device requirements, we can provide design, development and production by ISO13485-certified processes. Tell us your requirements so we can check whether a diffusion bonded manifold or integrated fluidic assembly is the best fit for your device concept. Request your project assessment now.

A bonded manifold can do more than route fluids through internal channels. Depending on the project, we can assemble the selected components directly onto the manifold to create a more functional fluidic subsystem. This can include media-separated valves, fittings, tubing or pressure control components. The result is a compact assembly that facilitates clearer routing, has fewer supplier interfaces and offers a quicker path towards production.

This approach is useful when your team wants to:

• Reduce separate assembly steps
• Integrate fluid control components into one compact unit
• Simplify supplier coordination
• Improve repeatability in production
• Review manifold, component and interface design together

The former Carville diffusion bonding technology is now part of our life science manifold capability, enabling us to work on compact fluidic architectures for demanding device projects.

What does this mean for your application?
A clearer route from manifold concept to production-ready fluidic assembly as diffusion bonding, engineering advice, component integration and testing expertise are all provided in-house, backed up by quality processes and worldwide support from Festo.

Whether you are still designing your fluidic path or already realising how the design restricts cleanability, footprint, repeatability or production transfer, a technical assessment can identify the most suitable route. You do not need to have all the detail to start the conversation. But the more context you share, the faster we can assess whether a diffusion bonded manifold, another fluidic manifold or an integrated fluidic assembly is the best option for your project.

Use our free design guide to review an existing concept before the assessment or prepare the key inputs for a new manifold design.

Prepare what you know about:

✔ Application area
✔ Fluid type and media details
✔ Target function and fluidic diagram
✔ Flow, pressure and volume requirements
✔ Material preferences or restrictions
✔ Current prototype status
✔ Expected production stage, quantities and timing
✔ Need for valves, fittings, tubing or pressure control
✔ Cleanability, compatibility or documentation needs