Background
A globally recognized PCB and substrate manufacturer — known for high-reliability substrates used in automotive, industrial and advanced computing applications — needed a backup board partner for its India production base. The facility required boards that could meet tight flatness and cleanliness specs while clearing a formal supplier-qualification process including NDA, quality agreement and business-ethics declaration.
Before engaging YUESHAN, the manufacturer sourced from multiple regional suppliers but needed a partner able to provide full documentation and consistent batch-to-batch quality across years of supply.
The Challenge
- Strict substrate specs — Backup boards for high-layer-count and substrate-grade drilling demanded 80±3 HD surface hardness and densities up to 1000±30 kg/m³.
- Supplier qualification — Required signed NDA, quality agreement and supplier-ethics declaration before any volume order could be placed.
- Documentation discipline — Every shipment needed matched TDS/MSDS and COC test reports for factory audit traceability.
The Solution
YUESHAN supplied a qualified material stack backed by full compliance documentation:
| Layer | Product | Specification | Role |
|---|---|---|---|
| Entry sheet | Aluminum Entry 1100 H18 | 0.18 mm, oil-free surface | Burr-free drilling, no panel contamination |
| Backup board | Traditional Melamine Board | 2.0 / 2.5 / 2.7 mm, 80±3 HD, 1000±30 kg/m³ | High-hardness support for advanced substrates |
Why the customer qualified YUESHAN:
- Compliance readiness: NDA, quality agreement and ethics declaration delivered and accepted without back-and-forth.
- Spec match: Melamine backup board met the 80±3 HD / high-density requirement consistently across multiple shipments.
- Audit support: COC test reports and full TDS/MSDS available for every batch, supporting the manufacturer's internal audit process.
The Result
- 2018: First orders shipped, qualification documents executed.
- 2018–2020: Steady repeat orders with CI/PL/SGL documentation per shipment — no quality incidents.
- 2025–2026: Renewed quotation activity for aluminum entry boards and backup boards, including a confirmed comprehensive proposal covering expanded volumes.
The manufacturer's procurement process placed high value on transparent, auditable documentation and consistent quality across years of supply. Every TDS matched the actual product — a discipline that not every supplier maintained.
Why This Matters for Similar Manufacturers
This engagement demonstrates YUESHAN's ability to serve audit-driven, high-compliance PCB manufacturers:
- Formal supplier qualification (NDA / QA / ethics) is handled upfront, not treated as an afterthought.
- High-hardness melamine backup boards meet advanced substrate specs (Traditional Melamine Board at 80±3 HD).
- Full documentation discipline supports factory audits in regulated industries. See our certifications page for more.
For manufacturers needing similar qualification support, our Defense & Aerospace and HDI & IC Substrate solution pages cover the relevant material grades.
Your Next Step
If you are a compliance-driven manufacturer evaluating a new drilling-material supplier, send us your required backup board specs (thickness, hardness, density), your qualification document requirements (NDA / QA / ethics), and your current audit documentation needs. We will provide matched documentation and a sample recommendation.