A request for quotation for a perovskite production-line machine usually reaches the supplier as a product name and a request for a price. The supplier answers with the standard machine and a number. Three suppliers do this in three different ways, and the buyer is left comparing three different products at three prices that cannot honestly be compared. What makes the quotes comparable is not the template you send but the questions inside it.
The published specification table for this class of equipment is short: substrate and frame dimensions, a throughput figure, a fragmentation rate, a mean time between failures. Every one of those numbers is a boundary. Each one says something the line expects to receive or promises to return. An RFQ that states your own reality first, then turns each published number into a question with a written answer, gets three responses to the same question. The sections below follow that order.
State your own reality before you ask anything
The product page for this perovskite production line equipment series describes it as specialised research and development equipment spanning perovskite solar cells, OLED, lithium batteries, quantum dot LEDs and OPV, capable of producing nanoscale oxide, nitride and metal thin-film materials. That is five industries in one sentence. Name yours in the RFQ, describe your material stack, and ask each supplier to confirm in writing that the machine is applicable to your materials and process before you evaluate a single price.
Then write down what the supplier cannot guess: what sits upstream of this line and what receives its output; how material arrives today (cassettes, magazines, trays or loose parts) and in what condition; how many substrates a day and across what shift pattern; who will operate and who will maintain the line; and what your room can actually supply in power, air, exhaust and space. A supplier who receives this writes your machine. A supplier who receives a product name guesses, and three guesses are not comparable.
Ask what the machine actually does to your material
Read the page carefully and you will notice two different impressions. The description claims the production of thin-film materials through manufacturing processes. The parameter table, meanwhile, reads like the boundary data of a handling line: substrate, composite film and frame dimensions, a throughput figure, a fragmentation rate, a failure interval. Those two readings imply different purchases.
Make every bidder resolve it in writing: exactly which process steps does the equipment perform on your stack, which steps belong to adjacent equipment, and where does the supplied scope end and your responsibility begin. Pages in the thin-film solar equipment category show how neighbouring stations are specified; read them before you write your interface questions, so the questions name real boundaries instead of vague compatibility. One written page of scope prevents the most expensive surprise in automation purchasing: a machine delivered into a cell built around a different understanding of what it does.
Turn the compatibility figures into questions
The table lists a substrate size of 108.5 mm x 108.5 mm at 450 to 850 micrometres thick, a composite film of 121.5 mm x 121.5 mm at 20 to 127 micrometres, and a frame of 125 mm x 125 mm at 0.8 mm. Treat each line as the start of a conversation, not the end of one.
- What dimensional and thickness tolerances sit around those figures, and what flatness and warp limits does the machine accept? A size with no tolerance stated is a wish, not a specification.
- What edge condition is acceptable, including chips and micro-cracks, and which surfaces of a coated substrate is the machine allowed to touch? Handling marks on a coated side are a yield problem, not a cosmetic one.
- Does the film thickness range refer to the film on the substrate, and how is total stack thickness calculated against the substrate range? Ask for the arithmetic, not two independent rows.
- What are the frames made of, are they reusable, for how many cycles, and what retires one? In processes that run films on frames, the frame is a consumable, and its cycle life belongs in your cost model.
- What changes if your part falls outside the listed range: change parts, new fixtures, a different price? Ask now, while the answer is a paragraph, not later, when it is a purchase order.
Ask what is inside the throughput figure
The capacity row gives 800 pieces per hour with a figure of 4.5 seconds, and a separate row gives a loading time under 4.5 seconds. Two similar numbers, worded differently. Ask in writing which measurement each one refers to before either number enters your planning.
Then ask what the cycle contains. Is 800 pieces per hour the arithmetic of a 4.5-second cycle, or a rate measured over a defined duration on real material? What is inside the cycle: pick from where, place where, and does it include the handshake with adjacent equipment? What does the line do when the downstream station is full and when the upstream station falls behind, and how much buffer does it carry? What availability is assumed behind the number, and how long does a format changeover take with your fixtures? Close the section by asking for the one figure you can verify yourself: a run on your own parts, over a period you define, counted by your own people.
Ask how the reliability figures were measured
The table states a fragmentation rate below 0.01 percent and a mean time between failures of at least 360 hours. Both are useful numbers and both are undefined on the page, which means each bidder is free to measure them differently.
For fragmentation, ask for the denominator: per piece or per hour, over what sample size, and on what material - bare glass, a coated substrate, or a film mounted on a frame. Ask what counts as a failure: only whole fragments, or also chips and micro-cracks that survive handling and fail at the next station. For the failure interval, ask for the definition and the statistical basis, what counts as a failure (a full stop, or degraded running that an operator compensates for), whether repair time is included, and at what duty the hours were accumulated.
These two figures decide your spare-parts holding, your staffing and the real cost of a stopped hour, so an undefined number should not become a contractual acceptance criterion. Write your own definitions into the RFQ and ask each bidder to respond to them line by line. A bidder who answers with a definition is telling you how their machine behaves; a bidder who repeats the brochure is telling you what they hope.
Ask for a trial on your own materials
A demonstration on the supplier's own substrates proves the machine can run. It says very little about your stack. Put a trial in the RFQ itself: your own substrates, your own films, your own frames, and acceptance criteria you wrote before the run started. Sensible criteria include pick and place success across a full working day, marks left on coated surfaces, behaviour at the thin and thick ends of the published ranges rather than only the comfortable middle, and cycle time kept through changeovers and short stops rather than in one clean hour.
During the trial, change one variable at a time and photograph fixed reference points so the second run can be honestly compared with the first. Send the record, not a summary, to every bidder. A summary invites a brochure; a record invites an answer.
Ask for the facility, control and data sheet
The page does not list electrical load, compressed air, vacuum, exhaust, footprint, weight or cleanroom class. Request a utilities and infrastructure sheet before you freeze the cell layout, because a circuit or a duct discovered after the floor is poured is not a purchase, it is construction. Ask what the machine expects from the room and what the room must be able to give, and have your own electrician and facilities lead sign the answer.
Then ask about control and data. How many recipes does the machine store, who can edit them, and can they be exported? Does every piece carry a record of what happened to it? On a research and development line, every piece is an experiment, and a line that cannot say which piece saw which condition quietly destroys the experiments it processes. Ask what format the data leaves the machine in and how it joins your own logging. Finally, ask about interlocks and guarding: the line will stand within reach of people who did not specify it.
Close the questions that decide whether the line keeps running
The machine is bought once; the running is daily. Put the running questions in the RFQ: documentation in a language your maintainers read; training on your own product rather than a demo article; a wear-parts list with part numbers, replacement intervals and prices, because suction pads, grippers, belts and sensors are consumables on any handling line and their price is part of your cost per piece; the warranty scope and what voids it; and who responds when the machine is down in your country, in what language, in what time zone, and with what parts on hand.
Write the acceptance test into the contract before you sign it: a factory test you witness on your own materials, a site test on your own schedule, and payment tied to those results. An acceptance criterion invented after delivery is a negotiation; one written before the design is signed is an engineering agreement.
When the RFQ is finished
The document is complete when every published number has a written definition, every undefined need has a written answer, and the scope boundary between the machine and everything around it is on paper in terms both sides have signed. That work takes days, not weeks, and it is cheaper than any of the mistakes it prevents. Describe your materials, your volumes and your room to the PowerDe team through the contact page, and ask for the written answers this article says any supplier should be willing to give.
