Start from the parts and the process window, not from the machine
Laminated assemblies that need a debubbling step are usually defined by a stack: cover film, adhesive layer, display or optical module, and sometimes a carrier. The requirement document should describe that stack first — overall outer dimensions, corner radii, which surfaces are already finished, and which layer carries the bubble risk. Only then does it make sense to state process expectations.
For the high-pressure debubbling machine listed in PowerDe's semiconductor process equipment range, the published cell information is short and readable: tank dimensions of ø1000 mm × 1200 mm (diameter × length), SUS304 stainless steel, operating pressure from 0.1 to 0.7 MPa, test pressure of 1 MPa, digital pressure display, and units selectable among MPa, kgf/cm², bar and psi. Treat those figures as the machine envelope the enquiry has to fit, and write your process window inside it rather than beside it.
Requirement item 1: chamber fit and loading method
"Chamber diameter 1000 mm" is not the same statement as "my panel fits". Write down the outer size of the loaded fixture, not of the bare part, and state how the fixture enters the tank: manually, on a cart, or through an opening that limits handling. Then record the loading pattern — single stack, several baskets, or a rotating holder — because the pattern decides how much free space gas and heat have around each part.
A useful line in the document is a small sketch with three numbers: fixture outer diameter, fixture length, and clear gap to the tank wall. If a future product family is already planned, list its largest expected size too. Re-ordering a chamber because a second product line arrived two years later is a cost that a single sentence can prevent.
Requirement item 2: pressure range and the rate of change
State the working pressure band you need and check it against the band the supplier publishes. Where the datasheet gives an operating range of 0.1–0.7 MPa and a separate test pressure of 1 MPa, keep those two numbers in different rows of your requirement table: one describes normal production, the other describes a verification condition. Mixing them is the most common way an internal specification quietly becomes unusable.
Then write the pressure path your process cares about: how fast pressure may rise, whether a dwell period is required, and how fast it may be released. Rapid release is often the moment when a re-distributed bubble reappears, so a controlled venting step is worth specifying by name and asking for in the proposal.
Requirement item 3: safety and compliance references
A pressure chamber changes how a cell is inspected and who may operate it, so the requirement document should carry the standards by name. The published product information for this machine refers to a safety level that follows level 2 pressure vessel requirements, and to safety specifications following the AVBU Equipment Safety Specification V.2. Copy those references into the enquiry and ask the supplier to confirm which edition applies to the delivered unit and which documents — material certificates, pressure test records, drawings — come with it.
Add the local obligations your own plant carries. If your site requires a registered pressure vessel, an interlock review, or a specific operator qualification, put those in the same table. Compliance language written after an order is a change order; written before the order, it is a requirement.
Requirement item 4: materials and contact surface
Record what may touch the product. The chamber of this model is listed as SUS304 stainless steel; if your process needs a different contact material, a coating, or a soft fixture interface, that belongs in the document as an explicit line with a reason attached. Also specify the atmosphere inside the tank: dry air, nitrogen, or whatever your material handling rules allow.
Note moisture and cleanliness expectations as well. A pressurised cell that leaves residue on an optical surface transfers a cleaning problem to the next station, and the fix is more expensive once the line layout is fixed.
Requirement item 5: control, data and units
Specify what an operator must see and what an engineer must be able to retrieve. For this machine the pressure reading is published as a digital display with selectable units in MPa, kgf/cm², bar and psi. Write down which unit your team uses, and say whether that unit must be locked rather than selectable on the shop floor.
Then state the recipe structure you need: how many process programs the machine should store, who is allowed to edit them, and whether each run should leave a record with pressure, time and result. A requirement written as "the machine shall log runs" is easy to satisfy in a useless way; a requirement naming the fields and the export format is not.
Requirement item 6: installation and utilities
Document the room before the machine. Floor loading and level, door width and the route from the receiving dock, power supply available at the position, compressed air or gas supply and its quality, and the space needed for maintenance access are all requirement lines rather than installation notes. If your plant limits noise or requires a pressure-relief route to a safe area, state that too.
Requirement item 7: acceptance test written before the order
The last block is the one most buyers leave out: what counts as delivered. Define the sample set you will run, who prepares the samples, how the result is judged, and how many repeats are required. For a debubbling step the judgement is usually visual or optical on a defined surface, so write down the inspection condition as well — lighting, viewing angle, and the size of defect that counts.
A requirement that says "bubbles removed" cannot be signed off. A requirement that says "no residual bubble above the agreed size on the agreed surface, checked under the agreed lighting, over the agreed number of consecutive runs" can.
A table your team can fill in
Keep the document short enough that people read it. A single table with seven rows — product and fixture geometry, pressure band and pressure path, safety and compliance references, contact material and atmosphere, control and data recording, installation and utilities, acceptance test — covers what a supplier needs to quote and what your team needs to verify.
Where to send the requirements
PowerDe builds semiconductor process equipment, laminating and bonding machines, and automation lines alongside its cleaning equipment, and takes enquiries through its solutions and engineering services pages. The practical path is to send the filled table with your drawings and let the supplier answer each row. If a supplier replies with a single price and no comment on pressure path, records, or acceptance, that reply is information about the project too.
