Requirements for halogen testing of electronic circuit boards

Date：2025-07-17 14:59:07 Classification ：【question】 Visits：

Core project requirements and standard basis for halogen testing of electronic circuit boards, integrating French, EU and international general specifications:

I. Core items and limits of halogen testing

According to IEC 61249-2-21 and IPC/JEDEC J-STD-709 standards, electronic circuit boards need to test the following four halogen contents:

II. Scope of test objects

Covering non-metallic materials in the entire process of circuit board production:

1. Substrate: epoxy resin, glass fiber reinforced laminate;

2. Coating and additives: solder mask ink, flux residue, bottom filler;

3. Connecting parts: cable insulation layer, connector plastic shell, socket resin;

4. Composite structure: Circuit boards with metal substrates need to separate and test the non-metallic parts.

III. Detection methods and key instruments

1. Sample pretreatment:

- Crush non-metallic materials to a particle size of <1mm to avoid metal contamination.

2. Mainstream testing technology:

- Oxygen bomb combustion-ion chromatography (EN 14582): accurate quantification of halogen ions;

- XRF screening: rapid initial screening of chlorine/bromine content, suitable for production line sampling.

IV. Common causes of exceeding the standard and improvement measures

V. Certification process and cycle

1. Sample delivery requirements: provide 3 batches of unused circuit boards (each batch ≥ 50g);

2. Test cycle:

- Conventional testing: 5-7 working days;

- Expedited service: within 3 working days (cost + 30%~50%).

3. Report output: attached with halogen-free compliance declaration, valid for 3 years (material unchanged).

VI. Coordination requirements with other regulations

- RoHS exemption: Halogen testing is independent of the 10 RoHS controls, but must be met simultaneously (such as lead ≤ 1000ppm);

- Environmental trends: Apple, Dell and other brands require total halogen ≤ 1500ppm, and short-chain chlorinated paraffins are prohibited.

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