What may be needed at the position, and who has to supply it
Six groups of services are the ones a buyer may need arranged before a line of this kind can be operated: electrical supply at the position, water in its three roles, exhaust and containment, room environment, compressed air or gas where a position uses it, and the signal wiring that lets the handling machine and the wet machine move together. What is actually needed at a given plant depends on the line and the position, and the published product description does not list utilities, so treat every item below as a question to put to the suppliers rather than as a specification. The rest of this article takes those six groups in order, and ends with the boundary list that keeps them from being quoted twice or quoted by nobody.
Start from the process the line has to hold, not from a checklist
Every useful utility question is downstream of a process question. The etch step named on the product page depends on a solution concentration and a solution temperature being held, and both are properties of the wet machine rather than of the handling equipment around it. So the first working session is not a comparison of connection sizes. It is a written statement of what the process at that position requires, and which party owns each requirement: the equipment builder, the wet-process supplier, the site engineering team, or a contractor neither of them supervises.
A practical way to run this is a two-column sheet. Left column: the condition that has to be true while the line is running. Right column: who supplies it, who maintains it, and where the hand-over point sits. Anything that cannot be assigned in that session is still missing when the line arrives.
Electrical supply at the position, not on the drawing sheet
Voltage alone tells you nothing about whether a bay will run a line. For each position, ask in writing for the supply arrangement the line expects: phase and frequency, the distribution layout between the panel and the machine, the protection and disconnect arrangement, and whether the figures describe the machine terminals or the panel feeding it. A quotation that names a supply without naming where the supply stops and the machine wiring begins is not a quotation, it is an assumption that someone else will absorb.
Two details decide cost more often than the headline voltage. First, whether the line is one continuous load or several zones with different behaviour at start-up, since a zone that starts cold behaves differently from one already at temperature. Second, whether control and power are separated in the quotation at all, because control wiring, interlocks and signals between the handling equipment and the wet machine are frequently priced by neither party.
Process water, temperature and quality
A wet process step consumes water in three different roles, and they are rarely listed separately: water that becomes part of the bath, water used to rinse, and water used to condition or heat something else. Ask the equipment and wet-process suppliers which role each connection serves. Mixing them leads to an undersized supply and an oversized expectation.
Quality is a written question, never an inference. Some steps tolerate mains water; others need a defined treatment, and treatment has its own space, consumables and service access. Ask for the water condition the process expects, stated as a condition the site must deliver, then price the plant that delivers it. If nobody states it, the first time the question is answered is during commissioning, when the answer is whatever the building already has.
Exhaust, containment and the handling of what comes off the line
The published process uses a chemical solution at an elevated temperature, so the ventilation conversation belongs to the chemical supplier and the wet-machine supplier rather than to whoever picks the fan. Ask what the enclosure vents, whether vapour leaves at fixed points or at transfer points, and whether the line expects an exhaust connection at all or is designed to sit inside a room that already extracts. Those are different installation scopes with different cost shapes.
Containment is the second half of the same question: what the site must provide so that solution, rinsing water and anything released from the substrate stays where the site intends it. Drain routing, a defined collection route, and an access route for removal are all site decisions. Since the stated purpose of the process is to recover the gallium arsenide substrate for reuse, the handling of recovered substrates is part of the flow, not an afterthought, and the space it needs is a layout decision made before the line is positioned.
Permits for chemical handling, discharge and storage sit with the site in most jurisdictions. Neither equipment supplier normally files them. Name the owner of that paperwork in the same session as the utilities.
Environment around the equipment, and the floor it sits on
Handling and alignment steps behave differently as temperature and humidity move, and the effect shows up as unstable results rather than as an alarm. Ask what condition the equipment expects in the room, and whether that expectation is a comfort figure quoted from an office or a band the builder has actually tested to. The difference matters because a tested band can be designed for, while an untested one becomes a debugging variable during qualification.
Then ask the boring questions that decide the schedule: floor loading and whether the slab is involved at all, level tolerance, clearance for doors and for a machine that has to be opened for service, turning space for the wafers and carriers arriving at the line, and whether the route from receiving to the position is passable without lifting equipment.
Compressed air, gases and control signals
Ask which points on the line use air, and how many, rather than accepting a single connection. Dryness and cleanliness of the supply matter wherever the air meets a film or a bonding surface, and treatment sits on the site side of the boundary. A gas line, if any position needs one, brings its own questions about storage location, tubing route, leak checks, and who inspects it after installation.
Signals are the utility most often left out of a budget. A line that coordinates a handling machine with a wet machine needs a defined interface: which side drives each step, what happens when a signal drops, and how the two control systems record what happened. Put that interface in the enquiry before the quotation, and ask for it as a document.
Where the machine stops and the building starts
Write the boundary once, as a list of hand-over points, and attach it to the enquiry. For each utility: the physical point, the party responsible up to that point, and the party responsible beyond it. The list is worth more than the individual figures, because it is the document that settles an argument in the third month of a project.
Keep installation, commissioning and qualification as three separate blocks with different names and different owners. An installed line that no one has run under process conditions is not a completed project, and a line that ran once with borrowed utilities is not a qualified one. Ask the supplier which utilities their own commissioning assumes, because a site that cannot deliver them during the commissioning window loses the visit.
Spares, service access and the ability to stop cleanly
A line built to separate a film and recover a substrate has consumables, bath chemistry, and items that wear at the transfer points. Ask what the first maintenance interval assumes, which parts are expected to be held on site, and how a stop is made safe when a wet bath is involved. Those answers shape what the site stores, who is trained, and how long an unplanned stop takes to clear.
A short list to send before the quotation is signed
Four questions usually expose whether a supplier has thought about the site rather than only the machine. What has to be true at the position for this line to run, stated as conditions rather than as a specification table? Which of those conditions are inside the supply and which are the site's to provide? What does commissioning need that a factory trial did not have? And what does the recovered substrate need in the way of handling, storage and space between steps?
One caution on figures. Any number in a catalogue describes the unit described on that page, and a production line is configured around the process it was designed for. If a published page does not list a utility, ask for it as a written answer covering that line and that position, and do not carry a figure across from another project.
PowerDe publishes the line itself under gallium arsenide production line equipment, the wider equipment family under thin-film solar equipment, and production-line work under automated production line solutions. Send the utility sheet with the enquiry rather than after it, and the site conversation starts with conditions instead of with a surprise.
