Inside the Plant: Die Bonding, SMT, Extrusion and Binning
Five production areas, an equipment list with tolerances and capacity figures, and photographs of the lines as they run — so you can check whether a capability exists before you send a specification.
HFY LED runs an LED strip plant in Shenzhen, China, with COB die bonding at ±25 µm, four SMT lines at 18,000 m of strip per day, two platinum-cure silicone extrusion lines, a photometric laboratory with two spectroradiometers, and sealing and packing under one roof. Every reel is binned to SDCM ≤ 3 and burn-tested for 24 hours, and the plant is open to customer audits with two weeks' notice.
What sits in each part of the building
Floor area per department matters commercially: it tells you how much work is in the shop and whether a large part can physically be handled.
SMT Assembly Line
Automatic SMT lines placing LEDs onto flexible PCB panels with in-line optical inspection.
Flexible PCB panels are loaded into carriers and run through automatic placement, so every LED lands on its pad at the same offset from reel to reel. Consistent placement is what keeps colour and brightness uniform along a 5 m strip, and it is why the same SKU ordered today matches the one installed last year.
Solder Paste Printing
Automatic solder paste printing ahead of pick-and-place, with 100% stencil inspection.
Solder paste is printed automatically onto every pad before components are placed. Paste volume decides whether a joint survives 50,000 switching cycles and a decade of thermal movement, so stencil condition and print alignment are checked on every panel rather than on samples.
Silicone Spraying & Sealing
Conformal silicone spraying and end-capping that gives strip its IP65–IP68 rating.
Finished reels are sprayed with even silicone coating and sealed with end caps before curing. Coating thickness and seal integrity decide the IP rating, so outdoor builds are pressure-tested after sealing instead of trusting the process alone.
Finished Product Testing
Every finished reel is lit, measured and inspected before it is approved for packing.
Operators power up each finished reel and check colour, brightness and continuity against the batch reference. A reel that does not match its bin record is pulled at this bench — not after it reaches a customer's installation.
Assembly & Packing
Reel taping, accessory kitting, labelling and export packing of finished orders.
Reels are terminated, taped, labelled with the customer label and bin code, then packed per panel or per store for project work. Packing to the installation plan is what turns a correctly produced order into a correctly installed one.
Equipment, capacity and tolerance
Capacity tells you the volume each line can carry; tolerance is the process figure we hold, not the machine's positioning specification. Where a number depends on the product — cut length, power per metre, sorting step — it is stated on the product page instead of here.
| Model | Type | Qty | Travel / capacity | Positioning | Used for |
|---|---|---|---|---|---|
| ASM AD 830 | COB die bonder | 3 | Reel up to 50 m | ±25 µm placement | 320 / 480 / 504 chips per metre, 8–10 mm FPC |
| Yamaha YSM20R | SMT pick-and-place | 4 | FPC width 5–15 mm | ±0.05 mm | 45,000 components per hour, 0402 to 5050 plus QFN |
| Heller 1913 MK5 | Reflow oven, 10 zone | 4 | — | ±1.5 °C per zone | Nitrogen atmosphere, 260 °C peak for SAC305 |
| Koh Young KY8030 | 3D solder paste inspection | 4 | — | ±1 µm height | Inline SPI before placement on every line |
| Silicone extrusion line, custom | Platinum-cure silicone extrusion | 2 | 6×12 to 10×20 mm profile | ±0.2 mm profile | Neon flex and IP67 / IP68 tube builds |
| Nordson Asymtek SL-940 | Conformal silicone coating | 1 | Reel up to 50 m | ±5 µm coating | IP54 and IP65 silicone coating |
| Everfine HAAS-2000 | Spectroradiometer with 1 m sphere | 2 | 380–780 nm at 1 nm | ±2% flux, ±0.001 duv | Reel binning and LM-79 reporting |
| Custom reel tester | Automatic electrical test | 3 | Reel up to 50 m | ±0.5% V and A | Forward voltage, current and continuity per reel |
| Custom burn-in racks | Ageing at rated current | 2 | 2,000 reels capacity | ±2 °C chamber | 24-hour burn-in on 100% of reels |
| Custom pressure rig | IP67 pressure test | 3 | 0.3 bar | ±0.01 bar | 60-second hold on every outdoor assembly |
| ESPEC TSA-71 | Thermal shock chamber | 1 | −40 °C to +125 °C | ±1 °C | Validation of new die attach and sealing processes |
Equipment list current as of 2026. Model numbers are listed because buyers check them; if a specific model is required for your programme, confirm availability before quoting.
The floor, as it runs
Come and look at it
A factory page is a claim; an audit is evidence. We schedule customer audits and site visits within two weeks, covering the full route your order will take — incoming dies and FPC, die bonding, SMT, extrusion, sealing, binning and packing. Remote video audits are available where travel is impractical, with the camera walked to whichever line or record you want to see.
- Two weeks' notice for on-site audits, including customer-specific checklists
- Remote video audit with a live spectroradiometer measurement demonstration
- Records available on site: calibration certificates, bin records, burn-in logs, LM-80 data
- NDA signed before any customer drawing or FPC design is shown during a tour
Send a specification, get a quotation in 24 hours
Tell us the product type, run length, wattage, CCT, CRI and IP rating. You will receive a fixed price, a lead time, and the feed and driver arrangement in writing — no obligation, and no sales call unless you ask for one.