Cleanroom assembly for OEMs
Cleanliness guaranteed from cleaning to packaged product
For high-tech components, cleanliness is not a separate operation, but the result of a controlled chain. When production, cleaning, assembly, and packaging are handled by different parties, every transfer is a moment where contamination and loss of quality can occur.
Roosen brings those steps together within a single organization. Production, cleaning, inspection, assembly, and packaging are vertically integrated and completed in our own cleanroom in the Netherlands. This ensures every process step is under the same management, limits the number of transfers, and guarantees cleanliness, quality, and reproducibility in the workflow.
Cleanroom capabilities
The right environment for critical products
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Cleaning to the core
Solvent vapor degreasing with PPC technology for cavities, complex geometries, and blind tapped holes.
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Assembly under cleanroom conditions
ISO 6 for assemblies up to 4 meters, ISO 5 for inspection and smaller products.
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Packaging as part of the process
Cleanliness guaranteed until the next process step in your chain.
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Capacity for series production
Equipped for repetitive series of 100 to 10,000 units per year.
Where cleanliness becomes vulnerable
Cleanliness issues often arise between process steps
A component that meets specifications after cleaning can still be contaminated upon arrival at your assembly line. Particles and film-like contaminants such as oil and grease are re-absorbed during handling, transport, intermediate storage, or assembly outside controlled conditions.
The consequences usually only become visible late: during incoming inspection, during your own assembly, or in the application itself. At that point, it is no longer a cleaning issue, but a matter of rejection, delay, and delivery reliability. Therefore, Roosen derives cleaning methods, inspection criteria, and handling from the requirements of the product and the environment in which it is applied.
Suitable for, among others:
- critical metal components
- products with cavities or blind tapped holes
- components for high-tech industries
- mechatronic assemblies requiring clean assembly
- turned, milled, and formed parts from Roosen’s own production
Controlled cleaning
A cleaning process that aligns with product and specification
Whether cleaning is effective depends on the geometry of the component, the nature of the contamination, and the cleanliness requirement set by your specification. Roosen treats components with a solvent vapor degreaser in combination with PPC technology (Pulsated Pressure Cleaning). While similar pressure pulse techniques usually work on a water basis, this method combines the dissolving power of a solvent with pressure pulses that also reach blind tapped holes and cavities.
The number of cleaning steps follows from the product: a single cleaning or a pre-cleaning followed by a final cleaning. After cleaning, the product is inspected in the ISO 5 room using UV light and/or a measuring microscope against pre-defined acceptance criteria. This ensures release for the next step is based on agreed criteria, and the result is traceable for your quality organization.
- solvent vapor degreasing with PPC technology
- pre- and final cleaning where the product requires it
- UV inspection in an ISO 5 room
- inspection with a measuring microscope with element analyzer
- particle measurement with a Particle Measurement Card (PMC)
- release and quality documentation according to pre-defined criteria
Assembled under cleanroom conditions
Assembly without transfer to another party
The moment between cleaning and assembly is the most vulnerable point in many chains, as the product changes environment or supplier. At Roosen, the cleaned component goes directly into the cleanroom and is assembled there: in the ISO 6 room for assemblies up to 4 meters, and in the ISO 5 room for smaller products. Handling, assembly sequences, and checks are defined per product, ensuring the result does not depend on individual methods.
The cleanroom is part of the same organization as Roosen’s mechatronic production and the machining and sheet metal working facilities in the Netherlands, Belgium, and India. This allows cleanroom assembly to be included as a process step in a production route already running at Roosen, from component to cleanly assembled module.
- Assembly of mechanical and mechatronic assemblies
- Smaller products in the ISO 5 room
- Defined handling, assembly sequence, and checks per product
- Quality control as a standard part of the process
Protected until the next process step
Packaging as the final step of the cleanliness process
The packaging determines whether the cleanliness achieved in the cleanroom is still demonstrable at your incoming inspection. Roosen therefore packages the product in the cleanroom, immediately after assembly or inspection, and tailors the packaging to the cleanliness requirement, the transport route, and the way the product is unpacked and processed in your facility.
Subsequently, Roosen organizes the delivery, either directly to the location or from a stock maintained in consultation. This ensures that packaging, logistics, and your own production planning are perfectly aligned.
- Packaging in the cleanroom, immediately after assembly or inspection
- Packaging tailored to cleanliness requirements and subsequent steps
- On-site delivery
- Stock at Roosen by agreement
Capacity in a tight market
A product with cleanliness requirements that needs to scale
Cleanroom capacity is scarce in the region, partly because large clients secure a significant portion of it. For OEMs with a growing product, the cleanroom step can thus become a potential bottleneck in the chain, even when component production itself can keep pace.
Roosen helps
Roosen has invested in its own cleanroom and deliberately does not dedicate it to a single dominant customer. Capacity is arranged based on the volumes you expect, within an order profile of serial, repetitive production and in conjunction with component production and assembly within the group.
What this delivers
A cleanroom step that can grow with your series, as part of a production route where cleanliness, capacity, and delivery are managed from a single organization.
From specification to delivery
One controlled route for your product
Clear division of scope
What you provide and what Roosen handles
You provide
- product specifications and drawings
- the cleanliness requirement and the application for which it applies
- acceptance criteria and desired quality documentation
- expected volumes and call-off pattern
- requirements for packaging and subsequent steps
Roosen handles
- the translation of your requirements into a product-specific workflow
- cleaning, inspection, and release
- assembly and checking under cleanroom conditions
- packaging and delivery as agreed
- capacity planning based on your volumes
- where desired, component production within the group
Clarity on requirements and process first
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The determining factor is the cleanliness requirement derived from your application. The main cleanroom area is qualified as ISO 6, and the 13 m² inspection room as ISO 5. Which class is required for your product and how it is demonstrated is established when aligning the specifications.
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The determining factor is whether the cleaning is part of a serial production route. Standalone cleaning is possible, but the cleanroom is designed for the combination of cleaning, assembly, and packaging, as cleanliness is best guaranteed within that integrated context.
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The determining factor is the process step. Components cleaned in the cleaning installation can be a maximum of 480 x 280 x 230 millimeters. In the ISO 6 room, assemblies up to approximately 4 meters can be assembled, with smaller products in the ISO 5 room. Manufacturability is assessed per product.
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The determining factor is whether the demand is serial and repetitive. The cleanroom is equipped for series of 100 to 10,000 units per year. Single items and one-off assignments fall outside that profile.
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The determining factors are the number of cleaning steps and the scope of the assembly. For most products, the lead time is within a few weeks.
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The determining factor is the acceptance criteria agreed upon in advance. Products are inspected in the ISO 5 room using UV light and/or a measuring microscope with an element analyzer, supplemented where necessary with a PMC measurement. We align the measurements and quality documentation included in the process with what your quality organization requires.
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The determining factor is which process steps your product undergoes. Cleanroom can be added to turning, milling, and forming work, as well as to mechatronic assemblies. The entire route then remains within Roosen, with a single point of contact for the overall coordination.
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The cleanroom is located in the Netherlands, at the same site as Roosen’s mechatronic production. Components can be manufactured and pre-cleaned at other locations, including Roosen India, and then cleaned and assembled in the Netherlands. The most suitable location is determined in advance for each component.
Submit your cleanroom challenge
Your cleanliness requirements as a starting point
In an initial meeting, we map out your product, the desired cleanliness, the subsequent steps in your chain, and the required documentation.
Afterward, it will be clear whether Roosen's cleanroom aligns with your application, and how cleaning, assembly, packaging, and capacity can be set up for your series.
Prefer to discuss your requirements directly? Call us at +31(0)497 517 171.