Manufacturing context
KingBrother lists fR-4 PCB — standard manufacturing conditions in its official manufacturing documentation. Standard material: Ordinary FR-4. Standard thickness: 0.4–2.0 mm. Standard copper: 17–35 µm. Standard line / space: At least 4 / 4 mil. Standard PCB manufacturing conditions. CAD-design limits and promotional fastest delivery times are not used as fabrication guarantees. Which stack-up, laminate grade, finished copper and acceptance criteria will be used for this board?
Official company source reviewed- Manufacturing focus
- Prototype PCB manufacturing · Small and medium batches · Design and assembly services
- Published footprint
- Guangdong
- Listing and account
- Independently researched · factory account not claimed
FR-4 PCB — standard manufacturing conditions
Manufacturer reportedStandard PCB manufacturing conditions. CAD-design limits and promotional fastest delivery times are not used as fabrication guarantees.
- Layer count
- Layer range not disclosed
- Line / space
- 0.1016 / 0.1016 mm
- Finished hole
- Not confirmed
- Impedance
- Not disclosed for this profile
| Standard material | Ordinary FR-4 |
|---|---|
| Standard thickness | 0.4–2.0 mm |
| Standard copper | 17–35 µm |
| Standard line / space | At least 4 / 4 mil |
| Finish choices | HASL, pure-tin HASL, immersion gold and OSP |
| Technical source | kingbrother.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.
- KingBrother — product and technical documentationhttps://www.kingbrother.com/14.htmlSource checked 2026-09-21Official website
- KingBrother — company informationhttps://www.kingbrother.com/Source checked 2026-09-21Official website
- KingBrother — company informationhttps://www.kingbrother.com/blank1.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.