How to Package and Ship Prototype Parts for ALD Coating

If you’re determining how to ship prototype parts for ALD coating, protect two things: the physical component and its surface condition. Confirm the project details with the coating provider before packing anything, avoid placing adhesives or cushioning directly against critical surfaces, immobilize each part inside clean packaging, and include enough documentation to identify every component when the box is opened.

A prototype can arrive without a scratch and still be unsuitable for coating. Oils, fingerprints, polishing compounds, silicone residues, corrosion inhibitors, and adhesive transfer can change how a thin film nucleates or adheres. Missing part numbers and unclear coating instructions can create a different problem by delaying intake or leaving the provider unsure which surfaces should be coated.

VaporPulse Technologies works with non-standard substrates, complex geometries, prototypes, and low-volume projects through its custom ALD coating and process-development services. Careful preparation before shipment gives the technical team a clear starting point for evaluating the component.

Confirm the Project Before Shipping Prototype Parts

Don’t treat shipment as the first step in the technical review. Before sending a component, confirm that the coating provider has enough information to understand the part and its intended use.

The initial project description should identify:

• Substrate material or material grade
• Part dimensions and approximate weight
• Number of components being shipped
• Desired coating material, if already selected
• Target thickness or performance requirement
• Surfaces that must be coated
• Features that must remain uncoated
• Maximum allowable processing temperature
• Existing finishes, plating, passivation, or surface treatments
• Adhesives, seals, lubricants, or polymer components
• The environment the coated part will encounter
• Any special handling or return-packaging requirements

If the part includes internal passages, blind holes, porous regions, assembled joints, or enclosed volumes, call those out in advance. ALD is often chosen because it can coat complex and non-line-of-sight surfaces, but geometry still affects gas transport, fixturing, purge requirements, and process development.

A drawing or CAD model is useful when written instructions could be interpreted more than one way. Mark the surfaces of interest directly on the drawing rather than relying on a description such as “coat the inside” or “protect the critical area.”

Ask Before Cleaning the Parts

It’s reasonable to assume that a coating provider wants perfectly clean parts. The problem is that an unapproved cleaning method can alter the substrate, leave a new residue, or remove a surface condition that matters to the project.

Ask whether the parts should be cleaned before shipment and which cleaning method is appropriate. Include information about any cleaning, machining, polishing, blasting, etching, or chemical treatment already performed.

Avoid last-minute use of:

• Silicone-containing cleaners or release agents
• Oily rust preventatives
• Wax-based protective compounds
• Household cleaning products
• Abrasive pads that change the surface finish
• Unverified solvents
• Compressed shop air that may contain oil or water
• Permanent marker on a surface intended for coating

ALD depends on controlled surface reactions. The substrate’s composition, surface termination, cleanliness, and prior processing can influence the initial nucleation behavior. That doesn’t mean every part needs a semiconductor-grade cleaning procedure. It means cleaning should be deliberate, documented, and compatible with the material.

If the component has already been exposed to cutting fluids, vacuum grease, fingerprints, coolant, mold release, or environmental contamination, disclose it. That information is more useful than presenting the part as clean when its history is uncertain.

Handle Critical Surfaces Without Touching Them

After final preparation, handle parts by a noncritical edge or an approved fixture point. Use clean, powder-free gloves appropriate for the component material.

Don’t touch optical faces, sealing surfaces, polished regions, electrical contacts, internal bores, or other areas that will receive the coating. Even when a fingerprint isn’t visible, it can leave organic material and salts behind.

Clean tools matter too. Using gloves offers little benefit if the part is then handled with oily calipers, shop rags, or contaminated tweezers.

For very small components, prepare a clean tray, vial, or divided container before handling begins. This reduces the likelihood that parts will be dropped, mixed together, or transferred between multiple surfaces during packing.

How to Ship Prototype Parts Without Surface Damage

Each part should be secured so it cannot move, strike another component, or contact an abrasive material during transport.

Use an inner package that matches the part:

• A rigid compartmented tray for small machined components
• A clean vial or container for very small parts
• A non-contact holder for delicate optical or polished surfaces
• An ESD-protective package for electrostatic-discharge-sensitive electronics
• A clean bag inside a rigid support for parts without delicate exposed surfaces
• A custom insert for irregular or high-value components

Don’t place loose parts together in one bag. Threads, corners, and machined edges can damage adjacent components as the package moves.

Avoid allowing ordinary foam, paper, tape, or bubble wrap to rest directly against a critical coating surface. These materials may shed particles, transfer adhesive, trap moisture, or abrade a polished finish. They can still be used as exterior cushioning when the component is already isolated inside a suitable primary container.

If tape is necessary, apply it to the packaging rather than the part. Never tape over the surface that will be coated unless the coating provider has specifically approved that material and placement.

Immobilize the Inner Package

Once each component is protected, secure the inner containers inside a strong outer box. Cushion the package on all sides and test it gently before sealing. Nothing inside should slide, rattle, or shift.

Heavy components need enough structural support that they cannot break through an insert or crush a smaller part. Fragile or unusually valuable prototypes may warrant a rigid case or double-boxed shipment.

For broader commercial packaging principles, the Defense Logistics Agency’s packaging guidance summarizes standards for preservation, cushioning, exterior containers, handling, and shipment. The exact packaging method still needs to reflect the component’s material, geometry, value, and sensitivity.

Photograph the packed parts before closing the box. The images create a useful record of the quantity, condition, orientation, and packaging method used at shipment.

Label Every Part and Container Clearly

The person opening the box should be able to match each component to the project documentation without guessing.

Use a part number or sample ID that also appears on the packing list, drawing, purchase order, or quotation. If multiple samples look identical but have different materials or surface treatments, package them separately and label each container.

Include a packing list with:

• Company and contact information
• VaporPulse quotation or project number, when available
• Purchase order number, when applicable
• Part and sample IDs
• Quantity of each item
• Substrate material
• Special handling warnings
• A list of included drawings or files
• Return shipping instructions
• The carrier and outbound tracking number

Keep the technical coating specification in the project record rather than relying solely on a note placed inside the box. Paperwork can become separated from the shipment, damaged, or overlooked. Send the relevant files electronically before the package arrives and place a printed copy inside as a backup.

Identify Surfaces That Should Not Be Coated

Masking and selective coating require more detail than a general instruction to “leave one side bare.”

On the drawing, identify:

• Coated surfaces
• Exclusion zones
• Electrical contact points
• Threads or tight-tolerance fits
• Sealing faces
• Grounding locations
• Areas used for fixturing
• Acceptable witness or contact points

Don’t apply your own masking tape, plugs, paint, wax, or temporary coating unless the provider requests it. Masking materials must be compatible with the coating process, temperature, vacuum conditions, and chemistry. A material that works during painting or plating may not be appropriate for ALD.

If a coating-free area is functionally critical, provide its dimensional or electrical requirement. That gives the process team a clearer basis for discussing masking feasibility and acceptable contact locations.

Disclose Hazardous or Previously Used Components

A used component may contain residues that aren’t obvious from its appearance. Tell the provider if a part has been exposed to process chemicals, biological materials, corrosive gases, battery electrolytes, fuels, plasma byproducts, radioactive environments, or other hazardous substances.

Don’t ship a contaminated component until its condition, cleaning history, and acceptance have been discussed in writing. The shipment must also comply with carrier and regulatory requirements for any hazardous material involved.

The same principle applies to sealed assemblies. Identify trapped liquids, pressurized cavities, batteries, energetic materials, magnets, and unknown internal substances before shipping.

Confirm the Shipping Address and Intake Instructions

Use the shipping address and recipient information supplied for the specific project. Don’t assume the general business address is always the correct receiving location for technical samples.

Before shipment, confirm:

• The recipient or department name
• Current delivery address
• Required project or quotation number
• Accepted delivery days
• Carrier restrictions, if any
• Whether a signature is required
• Insurance expectations
• Return-shipping arrangements

Send the tracking number once the package is in transit. For a first-time project, use the VaporPulse contact form to discuss the component, upload supporting files, and request the current shipping instructions before sending physical parts.