SMT Assembly on Flexible PCB for SMD and Pixel Strips
Flexible PCB SMT assembly for 2835, 5050, 5630 and WS2812B strips: ±0.05 mm placement, 100% AOI, 260 °C reflow, reels from 5 m at 15–20 day lead times.
SMT assembly places packaged LEDs and control ICs onto a flexible PCB, then reflows the solder to form the electrical joint. HFY LED runs 2835, 5050, 5630 and WS2812B placement at ±0.05 mm accuracy with 100% automated optical inspection, reflowing at a 260 °C peak on 2 oz and 3 oz FPC in widths from 5 mm to 15 mm.
When this process applies
We assemble strips with up to 240 components per metre and 4-layer FPC for pixel products. Boards requiring rigid-flex, metal-core PCB or components on both faces are outside our line capability and are quoted through a partner.
Technical specifications
| Placement accuracy | ±0.05 mm |
|---|---|
| Component range | 0402 to 5050, plus SOP and QFN ICs |
| FPC width | 5 mm – 15 mm |
| FPC copper weight | 1 oz, 2 oz, 3 oz, 4 oz |
| Reflow peak | 260 °C, lead-free SAC305 |
| Inspection | 100% AOI plus electrical test per reel |
| Daily capacity | 18,000 m of strip |
Where it is the right choice
- Volume SMD strip production from 500 m upward
- Pixel strips with an IC per LED or per three LEDs
- Dual-colour and CCT-tunable strips with alternating dies
- OEM strips built to a customer FPC drawing
Where it is the wrong choice
Stating this explicitly matters more than a capability list: if your part falls into one of these categories, another process will cost you less.
- Rigid or metal-core PCB assemblies
- Through-hole components and hand-soldered prototypes below 50 m
- Boards wider than 15 mm, which need a different carrier and are quoted separately
Equipment
- 4 SMT lines with solder paste printing and 3D SPI
- Pick-and-place machines rated at 45,000 components per hour
- 10-zone reflow ovens under nitrogen
- AOI stations on every line
- Automatic reel tester for forward voltage and current
Process questions
What is the minimum order for a custom SMD strip?
500 m, or 100 reels of 5 m. Setup, stencil and programming are fixed costs, so a 50 m custom run carries the same setup as 500 m and the unit price reflects it. Stocked configurations are available from 5 reels.
Can you assemble on our own FPC design?
Yes, with Gerber, BOM and a placement file. We review the design for copper balance and cut-mark placement before the first panel, because an unbalanced FPC warps in reflow and the resulting tombstoning is invisible until electrical test.
Related capabilities and products
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.