Direct answer: YUESHAN UV melamine PCB backup boards with UV-cured moisture-sealed HDF surface for 6–24 layer, HDI and back-drill lines. 840/880/950 grades, flatness ≤0.10 mm, TDS and samples. Buyers typically qualify it by density/hardness, thickness, flatness, moisture behavior, exit burr, drill wear and compatibility with the entry sheet.
Key Takeaways
- This is the commercial product page for supplier, specification, sample, TDS/SDS and quotation intent.
- The matching Material Profile explains composition, material properties and engineering mechanisms.
- Core SEO entities: UV melamine PCB backup board, UV coated backup board, moisture sealed HDF, melamine coating, HDI backup board, microvia backup board, back-drill backup, low smear, hole wall quality, warpage, humidity resistance, surface hardness, flatness.
UV Melamine PCB Backup Board Supplier for PCB Drilling
UV Melamine is YUESHAN's main upgrade from bare HDF when moisture stability, low smear and tighter multilayer/HDI drilling become more important. The UV-cured face is designed as a sealed, harder drilling surface while the HDF core maintains support and machinability.
Industry pages ranking around this product category consistently use procurement entities such as backup board, backing board, drilling support, density, thickness tolerance, surface hardness, warpage, standard sizes, HDF core, FPC, HDI, BGA, multilayer PCB and customized size. This page integrates those terms only where they describe a real buyer decision.
Commercial Specifications
| Specification | YUESHAN |
|---|---|
| Core | HDF |
| Surface | UV-cured melamine coating |
| Grades | UV Melamine 840 / 880 / 950 |
| Hardness | Approx. 80±5 / 80±3 / 83±3 HD by grade |
| Typical thickness | 2.0 / 2.5 mm |
| Flatness | ≤0.10 mm |
| Application | 6–24 layer, HDI, microvia and back-drill PCB |
Standard sheet formats: 940 × 1245 mm and 520 × 620 mm are used across the YUESHAN backup-board range; other industrial formats can be discussed against quantity and cutting requirements. Confirm the current TDS before final drawing release or incoming inspection.
Grade Selection
| Grade | Key specification | Typical role |
|---|---|---|
| UV Melamine 840 | Moisture-sealed HDF surface | 6–16 layer / humid lines / FPC |
| UV Melamine 880 | 80±3 HD class, 2.0/2.5 mm | 12–24 layer, HDI and back-drill workhorse |
| UV Melamine 950 | 83±3 HD class, 2.5 mm, dense HDF core | Recommended default for tighter HDI / microvia tolerance |
Use the PCB Backup Board Selector if you want a quick starting grade from layer count, smallest drill, humidity and exit-burr target.
What This Product Is Designed to Control
- Exit burr: support the copper and laminate as the drill breaks through the last PCB layer.
- Drill-bit breakage: provide a controlled landing layer rather than an abrupt unsupported exit.
- Hole-wall cleanliness: reduce fibre or resin transfer that adds desmear burden.
- Flatness / stack consistency: keep the support plane repeatable across the panel.
- Tool life: balance support hardness with drill wear.
- Cost per good hole: select the lowest-cost grade that still meets burr, breakage and yield targets.
HDF vs Melamine Laminate vs UV Melamine vs Phenolic
| Backup type | Main advantage | Typical reason to choose | Product page |
|---|---|---|---|
| HDF | Lowest cost / broad standard use | 2–12 layer, cost-sensitive standard drilling | HDF |
| Melamine Laminate | Hard fused surface + resilient core | FPC, rigid-flex, multilayer, phenolic alternative | Melamine |
| UV Melamine | Moisture-sealed, low-smear surface | HDI, humid factories, 6–24 layers, back-drill | UV Melamine |
| Phenolic PHE | Rigid specialty support | Selected IC substrate / routing / precision applications | Phenolic |
Applications
Standard PCB Drilling
Match grade to layer count, drill diameter and burr target.
Multilayer Guide →Small-Hole / Microvia
Use denser or sealed grades when tolerance and smear become critical.
HDI Solution →High-Reliability PCB
Flatness and repeatable support matter for long production runs.
Automotive Solution →Buyer Qualification Checklist
Send these items with an RFQ so the product can be qualified against the line rather than by name alone:
- current backup-board type and supplier specification;
- PCB thickness, layer count and laminate family;
- smallest mechanical drill diameter and typical hit count;
- panels per stack and target throughput;
- current exit burr / drill-breakage / smear problem;
- required sheet size and thickness;
- plant humidity / storage conditions;
- monthly or annual volume and destination port.
Send the specification to Mr. Lucky Xu →
Recommended Entry-Side Pairing
Lubricant-Coated Aluminum
For finer holes, higher RPM and friction/heat control.
Lubricant Aluminum →Industry & Standards Reference Set
- IPC design standards
- high-precision white backup board terminology
- YUESHAN technical material profile for this product
Standards and association references are used to support terminology and technical context. Always qualify YUESHAN using its current TDS and sample results.
FAQ
What is UV Melamine PCB Backup Board?
It is a PCB drilling backup board supplied by YUESHAN for defined drilling applications. The product page covers commercial specifications, qualification, samples and ordering; the material science is documented separately in https://www.yueshanpcb.com/materials/melamine-coated-uv-backup-board/.
How do I choose the right grade?
Start with PCB layer count, smallest mechanical drill diameter, stack height, target exit burr, humidity and current drill-breakage or smear problems. YUESHAN can recommend a starting grade and sample set.
Can I get TDS/SDS and samples before a production order?
Yes. Send your current board specification, sheet size, annual volume and drilling application to request TDS/SDS and a line-test sample.
How is this page different from the Material Library?
This is a commercial product page for supplier, specification, sample and quotation intent. The Material Library page explains composition, properties and process mechanisms.