AI Data Centers Push Liquid Cooling Forward: Where Precision-Etched Microchannel Plates Fit

AI Infrastructure Is Creating a New Cooling Challenge

The rapid expansion of artificial intelligence infrastructure is creating a challenge that extends far beyond computing performance: heat.

On August 17, 2026, Trinovium and Echelon Data Centres announced a strategic collaboration focused on advancing liquid-cooling technologies for AI and high-density computing environments.

According to the announcement, initial development areas include direct-to-chip cooling fluids, thermal management systems and modular liquid-cooling technologies designed for AI and high-performance computing deployments.

The announcement reflects a much broader engineering shift.

As more computing power is concentrated into increasingly dense servers and racks, conventional air cooling becomes more difficult to scale efficiently.

For thermal engineers, the question is increasingly changing from:

“How do we cool the data center?”

to:

“How close can we bring the coolant to the heat source?”

That shift is putting direct-to-chip liquid cooling, cold plates and microchannel heat-transfer structures at the center of next-generation thermal design.

Why AI Is Accelerating the Move Toward Liquid Cooling

AI accelerators combine enormous computing capability within a relatively small physical footprint.

As power density increases, the thermal path between the semiconductor and the cooling medium becomes increasingly important.

Instead of relying exclusively on air to transport heat away from electronic components, liquid-cooling architectures can bring coolant much closer to the heat-generating device.

This is driving engineering interest in technologies including:

· Direct-to-chip liquid cooling

· Microchannel cold plates

· Coolant distribution units

· Liquid-to-liquid heat exchangers

· Modular cooling systems

· High-performance compact heat exchangers

A common engineering objective connects these technologies:

Move more heat through less space.

And this is where microchannel structures become particularly interesting.

What Is a Microchannel Flow Plate?

A microchannel flow plate is a thin metal component containing precisely controlled fluid passages.

These channels guide coolant across or near a heat-transfer surface.

Instead of using one large internal cavity, engineers can divide the coolant path into multiple smaller channels.

This can increase the available heat-transfer surface area while allowing designers to control how fluid moves through the component.

Depending on the thermal design, a flow plate may contain:

· Parallel microchannels

· Serpentine channels

· Distribution manifolds

· Mixing zones

· Inlet and outlet structures

· Alignment holes

· Partial-depth channels

· Through-etched openings

The geometry can become surprisingly complex.

Manufacturing that geometry consistently — particularly in thin metal — becomes an important part of the thermal system itself.

Why Photo Etching Fits Complex Flow-Plate Manufacturing

Photochemical etching, also known as chemical etching or photochemical machining, provides a different manufacturing approach from conventional CNC machining or stamping.

A photoresist pattern defines the required geometry, and selected areas of the metal are chemically removed.

For microchannel flow plates, this manufacturing process offers several important advantages.

Complex Channels Without Conventional Cutting Tools

A complete flow pattern can be transferred photographically onto the metal sheet.

Straight channels, curves, branching structures, distribution zones and complex openings can therefore be produced within the same process.

There is no requirement for a cutting tool to physically follow every individual channel.

This becomes increasingly useful as the number and complexity of channels increase.

Burr-Free Features

Mechanical cutting processes can create burrs along feature edges.

Chemical etching removes material without conventional mechanical cutting contact.

For thin fluid-control components containing many small features, eliminating conventional cutting burrs can simplify downstream handling and assembly.

Partial-Depth and Through-Etched Features

A single flow plate may require different types of features.

For example:

Microchannels → partial-depth etching

while:

Ports and selected openings → through etching

This makes it possible to integrate different functional geometries into a single thin metal plate.

Faster Design Iteration

Thermal engineers rarely arrive at the optimum flow geometry with the first prototype.

Channel width, routing, distribution patterns and inlet geometry may change during CFD analysis and thermal testing.

With photochemical etching, these design changes generally do not require a completely new hard stamping die.

That makes the process particularly attractive during engineering development and prototype iterations.

From One Etched Plate to a Three-Dimensional Flow Structure

The potential becomes even more interesting when multiple etched plates are stacked.

Each individual plate can contain part of the fluid architecture.

When precisely aligned, multiple layers can create a complex three-dimensional network of internal channels.

Depending on the application, the stacked plates can subsequently be joined using a suitable bonding process, including diffusion bonding for certain heat-exchanger architectures.

The manufacturing concept can be summarized as:

Digital Flow Design

photo-Etched Flow Plate

Precision Alignment

Plate Stacking

Bonding Compact Heat Exchanger Core

This architecture is particularly associated with Printed Circuit Heat Exchangers, commonly known as PCHEs.

Instead of using conventional tubes and shells, PCHE designs can use chemically etched flow channels and bonded metal layers to create highly compact heat-transfer structures.

Precision at the Plate Level Matters

A finished stacked heat exchanger can contain a large number of individual metal layers.

Small variations at the plate level can therefore become important at the assembly level.

Engineers need to consider more than simply whether a channel pattern can be etched.

Several design parameters should be evaluated together.

Material

Possible materials include stainless steel, copper and selected nickel alloys depending on the operating environment.

Material selection may be influenced by:

· Corrosion resistance

· Thermal conductivity

· Operating temperature

· Mechanical requirements

· Fluid compatibility

· Subsequent bonding processes

Plate Thickness

Plate thickness affects both mechanical strength and achievable etched geometry.

Very thin materials can benefit from a non-contact manufacturing process because conventional mechanical machining may become increasingly difficult as thickness decreases.

Channel Width and Depth

Channel dimensions directly influence fluid resistance, pressure drop and heat-transfer behavior.

They also need to remain compatible with the selected manufacturing process.

Plate-to-Plate Consistency

When hundreds of similar plates are assembled into a stack, repeatability becomes particularly important.

The objective is not simply to manufacture one good plate.

It is to manufacture many plates with sufficiently consistent geometry for the complete assembly.

Alignment Features

Stacked structures normally require reliable positioning between individual layers.

Alignment holes or other registration features can therefore be integrated into the etched design.

Bonding Requirements

If the final structure will subsequently be diffusion bonded or joined through another process, the bonding requirements should be considered during the plate-design stage.

The etched plate and final assembly should be treated as parts of the same engineering system.

Beyond AI: Where Else Can Etched Flow Plates Be Used?

AI data centers are currently attracting significant attention, but the underlying manufacturing requirement extends into many other industries.

Semiconductor Equipment

Semiconductor manufacturing systems use sophisticated thermal, gas and fluid-control architectures.

Precision metal flow and distribution components can therefore become important within equipment subsystems.

Power Electronics

High-power electronic modules increasingly require efficient thermal management close to the heat source.

Compact liquid-cooling structures can help engineers manage high heat loads within limited installation space.

Aerospace Thermal Management

Space and weight constraints make compact heat exchangers attractive for demanding aerospace thermal systems.

Hydrogen and Clean-Energy Systems

Precision flow structures can also be relevant to applications requiring controlled gas or liquid distribution, including certain fuel-cell and electrolyzer components.

Industrial Compact Heat Exchangers

Industrial systems operating under demanding temperature, pressure or space constraints can benefit from compact stacked-plate heat-transfer architectures.

The opportunity for precision-etched flow plates is therefore much broader than AI cooling alone.

What Should Engineers Provide When Requesting an Etched Flow Plate?

Providing complete engineering information at the beginning of a project can significantly accelerate manufacturability evaluation.

Useful information includes:

· DXF, DWG, STEP or PDF drawing

· Material specification

· Plate thickness

· Overall dimensions

· Channel width

· Required channel depth

· Through-hole dimensions

· Dimensional tolerances

· Prototype quantity

· Expected production quantity

· Whether the plates will subsequently be stacked or bonded

For partially etched structures, clearly identifying which features are through-etched and which require controlled-depth etching is particularly important.

Precision-Etched Microchannel and Flow Plates from Metching

Metching manufactures custom photochemically etched metal components for thermal-management and fluid-control applications.

Our capabilities include:

· Microchannel heat exchanger plates

· Photo-etched flow plates

· PCHE flow plates

· Fluid distribution plates

· Partial-depth etched channels

· Through-etched ports and openings

· Stainless-steel flow plates

· Copper flow plates

· Nickel-alloy etched components

· Prototype and production quantities

Photochemical etching is particularly useful when a component combines thin metal, complex channel geometry and frequent design iterations.

For stacked heat-exchanger applications, plate geometry should also be evaluated together with alignment and subsequent bonding requirements.

Developing a New Liquid-Cooling or Compact Heat-Exchanger Design?

If your design contains complex microchannels, fluid-distribution structures or stacked thin-metal plates, photochemical etching may provide an alternative to conventional machining or stamping.

Send Metching your drawing together with the material, thickness, channel dimensions and quantity requirements.

Our engineering team can review your design for photochemical etching manufacturability before you move into production.

Request an Engineering Review

Send us your DXF, DWG, STEP or PDF drawing for evaluation and quotation.

Frequently Asked Questions

What is a photo-etched microchannel plate?

A photo-etched microchannel plate is a thin metal component containing precision fluid channels manufactured through photochemical etching. Depending on the design, channels can be partially etched into the material while selected ports or openings are etched completely through the plate.

Why use photo etching instead of CNC machining?

Photo etching can be particularly suitable for thin metal components containing many complex or repeated features. It avoids conventional cutting burrs and does not require expensive hard stamping tooling, making design modifications relatively straightforward.

Can microchannel plates be stacked?

Yes. Multiple etched plates can be aligned and stacked to create more complex three-dimensional fluid networks. Depending on the application, the plate stack may subsequently undergo a suitable joining process such as diffusion bonding.

Which materials can be chemically etched?

Common materials for precision flow-plate applications can include stainless steel, copper and selected nickel alloys. Material selection depends on operating temperature, corrosion resistance, thermal requirements, fluid compatibility and the intended joining process.

Is photo etching suitable for prototypes?

Yes. One advantage of photochemical etching is that design changes do not normally require a completely new hard stamping tool. This makes the process useful for prototype development and iterative engineering programs.

Key Takeaways

The rapid expansion of AI infrastructure is increasing demand for more advanced thermal-management technologies.

Direct-to-chip liquid cooling brings the cooling medium closer to high-power electronic components.

Microchannel structures can provide large heat-transfer surface areas within compact dimensions.

Photochemical etching enables complex thin-metal flow geometries without conventional cutting burrs or hard stamping tooling.

Multiple etched plates can be stacked and bonded to create sophisticated three-dimensional fluid structures.

For thermal engineers, channel geometry, material, manufacturing process, alignment and final bonding strategy should be considered together from the beginning of the design process.

Explore our precision-etched PCHE and microchannel flow plate capabilities.

Request an Engineering Review