Doosan PCB material certifications: UL file numbers, IPC-4101 slash sheets, RoHS and REACH docs — product-by-product breakdown for PCB engineers and compliance teams.

When you’re specifying a laminate for a new design, the material’s electrical properties get most of the attention in the early stages. But by the time you’re writing a BOM, generating compliance documentation, or preparing a qualification package for a tier-one OEM, the certification stack behind that material matters just as much as its Dk and Df numbers. For engineers working with Doosan products, understanding exactly which Doosan PCB material certifications apply — and what each one actually requires — keeps qualification reviews running smoothly and avoids last-minute surprises at the fabricator.

This guide covers the three pillars of Doosan’s certification posture: UL recognition, IPC material qualification, and RoHS/environmental compliance, along with what documentation you should be collecting and where to find it.

Why Doosan PCB Material Certifications Matter Beyond Compliance Boxes

Certifications aren’t just about regulatory gatekeeping. They answer a practical engineering question: has an independent third party verified that this material behaves consistently and safely under the conditions your product will see? By combining IPC standards with UL, RoHS, and ISO systems, electronics manufacturers can build a complete and reliable quality framework that controls every stage of production from raw materials to final delivery.

For Doosan specifically, the certification structure maps tightly to their product families — FR-4 general-purpose, high-speed network, IC package substrate, and PTFE-based RF materials — each of which carries a slightly different certification profile. Knowing which certifications apply to which product saves time when a customer quality audit lands on your desk.

UL Recognition: What UL94 V-0 and UL 796 Mean for Doosan Laminates

UL94 V-0 Flame Rating

UL certification is issued by Underwriters Laboratories, a third-party safety organization founded in Chicago that tests products before market release and sets manufacturing standards. For PCB base materials, the two most relevant UL designations are UL94 V-0 and UL 796.

UL94 V-0 is the flammability rating that every laminate used in a serious production design should carry. It means the material self-extinguishes within 10 seconds after a direct flame is removed, with no dripping of flaming particles. Every Doosan laminate product — from the standard DS-7409 FR-4 variants to the ILD-series PTFE materials — carries UL94 V-0 as a baseline. High Tg FR-4 CCL materials with UL94 V-0 rating are essential for high-temperature FR-4 applications and lead-free assembly processes that expose boards to peak temperatures of 260°C.

UL 796: Printed Wiring Board Safety Standard

UL 796 is the standard specifically for tests and safety of printed wiring boards, covering requirements including withstanding voltage between conducting traces, which is specified at 40V/mil or 1.6 kV/mm. UL recognition under UL 796 is what allows a fabricator to build boards using Doosan materials and claim UL-listed product status. The UL file number associated with a specific Doosan product is the document you need from your fabricator — it links the recognized laminate construction to the finished board.

UL Recognition Files, including UL file numbers and recognized constructions, are available through the UL Product iQ database. If you’re auditing a fabricator’s use of Doosan materials, checking the UL Product iQ database directly against the file number they provide is the fastest way to verify legitimacy.

IPC Standards: How Doosan Laminates Are Classified and Tested

IPC-4101: The Core Laminate Specification

IPC-4101 covers the requirements of substrate selection — laminates and prepregs — and is mainly used for rigid PCBs and multilayer boards, addressing the materials used, their size, and their characteristics. This is the standard that your fabricator’s material engineer, stackup tool, and impedance calculator all reference when working with Doosan materials.

Within IPC-4101, materials are categorized by “slash sheets” — numbered sub-specifications that define minimum property requirements for a particular material class. IPC-4101 defines material requirements for PCB laminate materials and other materials used to build stackups. Doosan’s DS-7409 series products are qualified to specific IPC-4101 slash sheets, and those slash sheet numbers should appear on your fabrication drawing’s material callout.

IPC-4101 Slash Sheet	Material Class	Typical Doosan Product Fit	Key Properties
/21	FR-4, Tg ≥ 130°C	DS-7409 standard grades	Basic epoxy/glass
/24	FR-4, Tg ≥ 150°C	DS-7409 mid-grade	Improved thermal
/26	FR-4, Tg ≥ 170°C	DS-7409DV, DV(N)	High Tg lead-free
/98	Low loss, Tg ≥ 150°C	DS-7409DQN	High-speed network
/129	Halogen-free, Tg ≥ 150°C	DS-7409HG series	IC substrate halogen-free

IPC-TM-650: The Test Method Bible

Every property listed in a Doosan datasheet — Tg, Td, Dk, Df, CTE, peel strength, water absorption — references a specific IPC-TM-650 test method. Key IPC-TM-650 test methods referenced in Doosan datasheets include 2.4.25c for Tg (DSC), 2.4.24c for Tg (TMA), 2.4.41 for CTE, 2.4.40 for decomposition temperature, 2.5.5.9 for dielectric constant and dissipation factor, and 2.4.8 for peel strength. When comparing Doosan specifications against competing laminates, always verify that the same IPC-TM-650 method was used for each measurement — Dk reported at 1 GHz via cavity resonator and at 10 GHz via stripline are not directly comparable numbers.

IPC-4103: For RF and High-Frequency Materials

For Doosan’s ILD PTFE-based materials, IPC-4103 — not IPC-4101 — is the applicable standard for specifying base materials intended for RF and microwave applications. If your design uses ILD-series materials for mmWave or sub-6 GHz RF work, the IPC-4103 slash sheet classification, not the IPC-4101 slash sheet, should appear in your stack-up specification.

RoHS and Environmental Certifications Across the Doosan Product Line

Doosan products comply with RoHS directive requirements and REACH regulation. Their halogen-free product lines meet IEC 61249-2-21 requirements with bromine content below 900 ppm and chlorine below 900 ppm. Every current product page on the Doosan Electro-Materials portal includes a per-product downloadable RoHS certificate and Material Safety Data Sheet (MSDS).

The table below maps Doosan product families to their environmental certification tier and the relevant standards:

Doosan Product Family	UL94	IPC Standard	RoHS	Halogen-Free (IEC 61249-2-21)	REACH
DS-7409DV (Low Loss FR-4)	V-0	IPC-4101/26	✓	✗	✓
DS-7409DV(N) (Ultra Low Loss)	V-0	IPC-4101/98	✓	✗	✓
DS-7409DQN (Super Ultra LL)	V-0	IPC-4101/98	✓	✓	✓
DS-7409HG Series (IC Substrate)	V-0	IPC-4101/129	✓	✓	✓
ILD Series (PTFE RF)	V-0	IPC-4103	✓	✓	✓

Engineers specifying Doosan PCB materials for regulated markets should collect both the RoHS certificate and the REACH SVHC declaration from Doosan’s quality department, as these are separate declarations and auditors typically want both.

Additional Quality Management Certifications

Beyond the three core pillars, Doosan Electro-Materials operates under ISO 9001-aligned quality management systems, consistent with their position as a supplier to tier-one semiconductor, networking, and automotive customers. ISO 9001 and ISO 14001 certifications correspond to quality management and environmental management system certification respectively, providing the manufacturing process controls that underpin the consistency of every electrical property listed in the datasheets.

For automotive and industrial applications, engineers should also request confirmation of IATF 16949 compliance through Doosan’s supply chain, particularly for DS-7409 products entering automotive module and ADAS designs.

Useful Certification Resources for PCB Engineers

• UL Product iQ Database — iq.ul.com — Verify Doosan UL file numbers and recognized constructions
• IPC Standards Store — ipc.org/standards — Purchase IPC-4101, IPC-4103, and IPC-TM-650
• Doosan Electro-Materials Product Portal — doosanelectromaterials.com — Per-product RoHS, MSDS, and datasheet downloads
• EU RoHS Official Directive (2011/65/EU + 2015/863) — eur-lex.europa.eu — Primary RoHS 2 and RoHS 3 legislative text
• ECHA REACH SVHC Candidate List — echa.europa.eu/candidate-list-table — Current restricted substance list under REACH
• IEC 61249-2-21 — iec.ch — Halogen-free laminate specification standard
• Altium IPC-4101 Slash Sheet Guide — resources.altium.com — Plain-language breakdown of slash sheet structure

5 FAQs on Doosan PCB Material Certifications

Q1. Where do I find the UL file number for a specific Doosan laminate product?

The UL file number is typically listed on the product datasheet or available from your Doosan distributor. You can then cross-reference it in the UL Product iQ database at iq.ul.com to confirm the exact recognized constructions — layer count, copper weight, and thickness combinations — that fall under that file.

Q2. Which IPC-4101 slash sheet should I call out on my fab drawing for DS-7409DV?

The DS-7409DV is a high-Tg, low-loss FR-4 product most commonly qualified to IPC-4101/26, which specifies FR-4 material with Tg ≥ 170°C. Your fabricator’s material engineer should confirm the exact slash sheet match based on the specific construction. Using the wrong slash sheet creates an audit mismatch even when the material itself is fully qualified.

Q3. Is REACH compliance covered by Doosan’s RoHS certificate?

No — they are separate declarations. Environmental declarations and conflict minerals documentation are available through Doosan’s quality department. Request the SVHC (Substances of Very High Concern) declaration separately alongside your RoHS certificate; auditors from automotive and medical OEMs routinely ask for both.

Q4. Do all Doosan halogen-free products also carry IEC 61249-2-21 certification?

Yes. The DS-7409HG series and DS-7409DQN are specifically positioned as halogen-free and comply with IEC 61249-2-21, with bromine and chlorine each below 900 ppm. The standard-grade DS-7409DV and DV(N) do not carry halogen-free designation — they are RoHS compliant but may contain TBBPA flame retardant, which is currently still permitted under RoHS.

Q5. How do Doosan certifications compare to competing laminates like Isola 370HR or Panasonic Megtron 6?

The certification framework is the same — UL94 V-0, IPC-4101 slash sheet qualification, and RoHS compliance are industry-wide requirements, not Doosan-specific. The differentiation is in which slash sheets each product qualifies for, specific Td and Tg values that determine fit for your assembly process, and the depth of electrical characterization data published. Among high-speed PCB material manufacturers, Doosan’s DS-7409D series is recognized for cost-effectiveness in the network and computing equipment segment.

Building Your Doosan Compliance Documentation Package

When you’re preparing a fabrication and compliance package for a Doosan-based design, the minimum documentation set should include the product-specific RoHS certificate, REACH SVHC declaration, MSDS, UL file number confirmation from the fabricator, and the IPC-4101 or IPC-4103 slash sheet reference on your fabrication drawing. Getting these documents in order before the fab review — not during it — is what keeps qualification timelines on track and keeps procurement from sending the design back to engineering.

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