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. The same qualification path for other buyers is set out in our PCB drilling material case studies. A manufacturer that scaled HDI production on the same materials is profiled in our Indian HDI scale-up case study.
Note: this is a representative customer scenario drawn from our own supply records. Client identity is withheld — country and industry descriptions are used in place of company names, and no specific customer has authorised disclosure of its name or data. Outcomes depend on each user's process, materials and equipment.