A purchase enquiry that only names a model number and a budget is not really a request for a quotation. For thin-film production, an RFQ is the first process-control document in the project. The questions you put in it decide whether the supplier engineers the laser cutting station around your stack and takt time, or whether you inherit a machine built for somebody else's line.
Why the RFQ carries more weight than in sheet-metal purchasing
In conventional metal cutting, a trial on the supplier's sample machine can reveal most risks before the contract is signed. Thin-film work is different. The material is a coating stack on a transparent or flexible carrier, the scribe or cut width has to be held against the dead area between cell fingers, and the substrate will crack or delaminate if the thermal load or the mechanical clamping is wrong. A quotation that ignores those conditions is priced against a different machine than the one you will be standing in front of at acceptance.
For buyers sourcing process equipment from a Chinese fabricator, the RFQ also carries the language and drawing burden. State units, tolerances and inspection criteria explicitly, and ask the supplier to answer each item in writing. Ambiguity in a cross-language RFQ becomes a change order later.
1. What is the actual layer stack being cut?
Do not describe the job as "perovskite film". List the stack, layer by layer, from carrier to top contact: substrate type and thickness, TCO, electron or hole transport layer, absorber, back contact, and any encapsulant or protective film that the laser has to cut, ablate without damaging, or cut through entirely. Give the sheet or roll format and the finished module size.
Also state what the machine is not allowed to damage. A P3 or P4 isolation scribe only has to clear a narrow lane, but the surrounding coating has to stay intact and electrically isolated. Ask the supplier to confirm which scribing or cutting levels their configuration covers, and to say how the dead area is controlled.
2. What beam, wavelength and power does the process require?
A complete RFQ asks for the laser source specification and its rationale, not just the wattage. Required items include wavelength, average and pulse power, pulse duration and repetition rate, beam quality, spot size at the workpiece, and the pulse-to-pulse stability the supplier will guarantee on the delivered unit. Ask which source brand and model will be fitted and whether an equivalent substitution is permitted.
Because thin-film absorption depends on wavelength and layer thickness, request a written process window: the fluence range, overlap and scan speed the supplier intends to run, and how the parameters are protected from operator changes. If your production line is intended to run continuously, laser cutting equipment for thin-film production should also be quoted with the cooling arrangement stated, air or water, together with the water quality and flow the utility must deliver.
3. What positional accuracy and what inspection prove it?
Precision is a set of separate numbers and each one needs its own test method. Ask for:
- Positioning accuracy and repeatability of the motion axes, with the measurement method and the temperature at which it is valid
- Scribe or cut width, kerf taper and edge quality, with the cross-section or microscope images the supplier will provide
- Registration between successive scribe levels, and the alignment reference the machine uses (marks, edges, or camera fiducials)
- Thermal damage and heat-affected zone limits, plus the test that demonstrates the absorber or transport layer is not degraded
Our own thin-film laser cutting station is specified at ±0.1 mm cutting accuracy and ±0.02 mm repeatability, with a 40-second cut cycle per piece and a quoted product pass rate of ≥99%. Put numbers of that kind into the RFQ as the format you expect back, then require the supplier to state how each one is verified at FAT.
4. What is the throughput, and what does it include?
A cycle time quoted on a dry run is not a production number. Ask for the cycle per piece broken down into load, alignment, cut, unload and any in-process measurement, at the stated substrate size. Request the stage travel speed separately from the cutting speed, since both appear in the machine specification and are frequently confused during quotation comparison.
Then test whether the quoted machine can scale. Specify your target output in pieces per hour and in area per hour, and ask for the configuration that achieves it. If the takt needs a second head, a dual-station table, or integration into a line with upstream coating and downstream lamination, say so in the RFQ. Our engineering team builds automated production line solutions for exactly this reason, and a stated output target is usually what changes the machine design from a stand-alone cell to an integrated line.
5. What utilities and facility limits apply on day one?
Provide the site conditions instead of asking the supplier to guess them. Give the available supply voltage and frequency, compressed-air pressure and dryness, chiller or cooling-water availability, floor space and door dimensions, floor loading, and any cleanroom class or exhaust requirement. A station rated for 220 V ±10% at 50 Hz with an operating range of 0–40 °C is only a valid quotation if those are the conditions it will meet.
Ask for the full utility list, the installed power, and the machine footprint including doors, handles and service access, so your facility layout does not have to be revised after shipment.
6. Who owns the process recipe, and what happens when the stack changes?
Thin-film processes are revised. Ask whether the recipe set is editable, whether recipe changes are locked behind supplier access, and whether an open recipe level is provided for your engineers. Confirm that a new layer stack can be qualified on the delivered machine without a new optical configuration, and price the option now rather than after the warranty period.
Also fix the data expectations: does the PLC and touch-screen control log cycle counts, alarms and parameter changes, and can that data be exported. For audits and for tracing a bad batch to a shift, this matters more than the specification sheet suggests.
7. What does the acceptance test actually run?
Write the acceptance terms into the RFQ. Request an FAT on your own material, not a coupon, with the sample quantity, the run duration, and the pass criteria agreed in advance. Include a repeatability check across a continuous run rather than a single setup, and record the dimensional and electrical measurements that define a good cut. State what happens if the FAT fails and what has to be corrected before shipment.
Ask for the spare-parts and consumables list with prices, the service response commitment, and what training is delivered on site. These terms are cheap to negotiate in the RFQ and expensive to negotiate after the machine is installed.
8. What commercial and interface information must be in the quote?
Require every quotation to be itemised: base machine, laser source, motion stage, alignment and vision hardware, software options, installation, commissioning, training, spare parts, and shipping. Ask for the delivery lead time against a stated deposit date, the incoterm, and the payment milestones tied to FAT and shipment rather than to calendar dates.
Finally, ask for the machine drawings in the units you work in. Where a supplier's English documentation is inconsistent — and this happens frequently on Chinese equipment sites — require confirmation of the governing version before order placement.
A short RFQ checklist to paste into your enquiry
- Full layer stack with thicknesses, carrier type, and module or roll format
- Scribe or cut levels required, and permitted dead area
- Wavelength, power, pulse parameters, spot size, and named laser source
- Accuracy, repeatability, cut width, HAZ limits, and the test method for each
- Target output in pieces and area per hour, with cycle time broken down
- Site voltage, air, cooling, footprint, cleanroom and exhaust conditions
- Recipe ownership, parameter logging, and data export
- FAT on your material with agreed pass criteria, plus spares and service terms
If you send that list and a supplier answers each line with a number and a test method, you can compare quotations on process capability instead of on price alone.
How PowerDe answers an RFQ of this kind
Shenzhen PowerDe Automation Precision Equipment Co., Ltd. has built process and automation equipment in Shenzhen since 2007, covering thin-film solar and perovskite production equipment, semiconductor process equipment and automated production lines. Our thin-film thin-film solar equipment range covers the coating, sputtering, cutting and bonding steps that sit around the laser station, which means an RFQ can be answered as a process chain rather than as an isolated machine.
Send us your layer stack, target output and site conditions, and we will return an itemised configuration with the process window, acceptance test plan and lead time stated in writing.
