Manufacturing context
Lifeng Circuit Board lists fR-4 through-hole PCB — 1 to 20 layers in its official manufacturing documentation. Board thickness: 0.4–2.4 mm; listed discrete thicknesses. Standard panel: 550 × 420 mm. Oversize maximum: 500 × 1100 mm. Finished outer copper: 35, 70 or 105 µm. FR-4 through-hole range. The source recommends routing above 6 mil for easier manufacture; smaller stated minima require engineering review. Which stack-up, laminate grade, finished copper and acceptance criteria will be used for this board?
Official company source reviewed- Manufacturing focus
- FR-4 through-hole boards · Multilayer PCB manufacturing · Guangzhou production
- Published footprint
- Guangdong
- Listing and account
- Independently researched · factory account not claimed
FR-4 through-hole PCB — 1 to 20 layers
Manufacturer reportedFR-4 through-hole range. The source recommends routing above 6 mil for easier manufacture; smaller stated minima require engineering review.
- Layer count
- 1–20 layers
- Line / space
- 0.1 / 0.1 mm
- Finished hole
- 0.2 mm
- Impedance
- Not disclosed for this profile
| Board thickness | 0.4–2.4 mm; listed discrete thicknesses |
|---|---|
| Standard panel | 550 × 420 mm |
| Oversize maximum | 500 × 1100 mm |
| Finished outer copper | 35, 70 or 105 µm |
| Finished mechanical hole | 0.20–6.20 mm |
| Technical source | lf-pcb.com · Manufacturer specification |
These are separate published limits, not a promise that every combination is manufacturable. Unknown values are excluded from numerical filtering.
Know what has been checked.
The website review establishes the source of a statement. Independent UL ownership, equipment and material checks are tracked separately.
UL ownership
Not independently verifiedNo supporting record has been reviewed for this category.
Qualification request: Legal holder, manufacturing address and current UL recognition.
Equipment & in-house processing
Not independently verifiedNo supporting record has been reviewed for this category.
Qualification request: Machine inventory, location and evidence that the relevant process runs at the quoted site.
Material traceability
Not independently verifiedNo supporting record has been reviewed for this category.
Qualification request: Laminate grade, supplier documentation and traceable production-batch records.
Sources & review record.
Reviewed 2026-09-21. Manufacturer pages can change; confirm the current revision when requesting a quotation.
- Lifeng Circuit Board — product and technical documentationhttp://www.lf-pcb.com/about-7.htmlSource checked 2026-09-21Official website
- Lifeng Circuit Board — company informationhttp://www.lf-pcb.com/about-2.htmlSource checked 2026-09-21Official website
- Lifeng Circuit Board — company informationhttp://www.lf-pcb.com/Source checked 2026-09-21Official website
- Lifeng Circuit Board — company informationhttp://www.lf-pcb.com/proshow-23-3-16-16-100-3.htmlSource checked 2026-09-21Official website
Company names and images identify the source manufacturer. Listing does not imply endorsement, partnership, account participation or completion of a factory audit.
Make the first technical conversation useful.
Which stack-up, laminate grade, finished copper and acceptance criteria will be used for this board?
Attach the manufacturing brief
Layer stack-up, finished dimensions, copper weights, laminate grade, quantity and delivery destination.
Define acceptance
Finished-hole tolerance, impedance targets, coupon requirements, surface finish and permitted process substitutions.
Confirm the recipient
Agree the manufacturing legal entity, confidentiality terms and approved site before sharing production files.