What questions belong in an RFQ for roll-to-roll magnetron sputtering machines?

A quoted cycle time only means something when it matches the part you actually run. Before any semiconductor process equipment is sized, mapped into a cell or released into a line, we suggest confirming three numbers with your own samples and gauges: the required takt time, the cycle time the supplier states, and the throughput you measure on the trial machine over a full shift. One published figure cannot cover every stack, film and panel size, so the assessment becomes a measurement exercise rather than a datasheet comparison.

Start with takt time, not with machine claims

Takt time comes from demand, not from equipment. For a single line working one shift, 3,000 display units a day corresponds to about 6.25 units an hour, so roughly one unit every 9.6 minutes. If the shift is eight hours with breaks, or if the plant runs two or three shifts, that figure changes, and the equipment requirement changes with it.

We suggest writing the demand side down before reviewing any machine:

• Daily and monthly volume for the model family, plus the peak week you expect to support.
• Shift pattern and the productive hours per shift after changeover and planned maintenance.
• Product mix. Bonding 5.5-inch modules and 86-inch modules in the same factory is not one capacity plan.

The table assumes one station per machine and ignores changeover and yield loss; treat it as a first sizing check, not as a capacity plan.

Which cycle does the published number describe?

A bonding machine passes through loading, alignment, lamination or hot pressing, unloading and, in some designs, a vacuum or debubbling step. Suppliers publish different versions of this figure, so ask which one you are reading:

• Single-station cycle — the elapsed time for one part through one station.
• Line cycle (takt of the machine) — the interval at which finished parts come out when load and unload overlap with the process.
• Process-only time — press, heat or vacuum time, excluding handling.

The difference is large enough to move a purchase decision. Our engineering team normally asks for a timed cycle breakdown by station, recorded on a machine of the same configuration, so the number can be matched to your loading scheme instead of accepted as a headline figure.

Published figures are test conditions, and they differ across the range

PowerDe's 3D Surface Vacuum Bonding Machine listing states a uptime of 98% or higher and a 20-second cycle time based on a 5.5-inch soft-to-hard test — a small test coupon, not a production part. Other machines in the same semiconductor equipment series are specified in different terms: the medium-sized automatic laminating machine covers 10–32 inch films with CCD alignment and roller bonding, semi-automatic roller bonding equipment covers 5–15 inch products, and the fully automatic aluminium plate plus LCD laminating machine bonds 60–86 inch ultra-thin LCD glass and aluminium plate.

PowerDe also states that its automatic bonding production for BMW instrument and central multimedia display devices, and a SONY-customised 8K TV process on the 60–86 inch laminating machine, were built for particular customers. Those figures were established for the process each customer supplied. We therefore treat any third-party number in a listing as a reference point, and we ask what the buyer has verified.

Changeover, yield and availability change the answer

A cycle time says nothing about how much of the shift it applies to. When comparing two machines, we suggest asking for these items in writing:

• Recipe switching time between panel sizes, and whether recipe changes need tooling changes.
• Film, glass and consumable change time, and how often it occurs at your volume.
• Stated availability together with the planned preventive maintenance window and unplanned stoppage assumptions.
• First-pass yield on your film stack, and the rework route when alignment or bubble defects appear.
• Scrap rate on the incoming glass, film and module tolerances you control.
• Operator count per machine and the human steps inside the cycle.
• Space, utilities, and any nitrogen or vacuum supply needed.

Availability belongs in the arithmetic. If a machine is stated at an availability of 98% or higher, then for every eight hours of scheduled time about 480 minutes are available, and roughly 10 minutes are lost to stoppage on the supplier's own assumption. Capacity follows the shift figure you use, not the availability claim by itself.

Run the trial on your own parts

A supplier trial on customer-supplied material is the only way to convert a published number into a planning figure. Our suggested test plan:

1. Send the film, glass and module lots you actually buy, at the thicknesses and curvatures in the current design.
2. Run at least a full shift without adjusting the recipe, and time each station separately.
3. Record changeover for every product variant in the mix.
4. Measure first-pass yield and inspect for bubbles and fitting error against your own criteria.
5. Convert the totals into parts per hour and cost per bonded unit at your volume.

For a curved or flexible design, PowerDe lists dedicated equipment for these cases, including automatic alignment large-size curved surface lamination, a fully automatic 3D surface laminating machine, and an OLED folding screen vacuum bonding machine. If your geometry is unusual, we suggest sending samples early, because fixture design, not cycle time, is usually the long-lead item.

A short list of questions for the supplier

• Which panel size, film stack and curvature was this cycle time recorded on?
• Is the figure a single-station cycle or the interval between finished parts?
• Can we watch the same machine run our material before ordering?
• What throughput did your other display customers achieve after commissioning?
• What is included in commissioning, and who supplies the upstream and downstream handling?

PowerDe develops this equipment alongside automated production line work and equipment manufacturing automation services, so we can scope a bonding cell from handling and alignment through to line integration, and can build a customised configuration where a standard model does not match your part. Send us your panel dimensions, film stack, target volume and shift pattern, and we will tell you which configuration and how many stations the cycle time requires.