RoHS Standards

RohS Compliant Silicon Wafers

A PhD candidate requested the following quote.

Please quote me the following Si wafers. Single crystal wafer Diameter=6+/-0.05 Inch Thickness=520-620um Cut: (100) +/-5degree No doping, Purity>99.999999999%, (Need Purity report) Resistivity>100ohm-cm. We need a RoHs Compliant document to show the test result presenting no dangerous substance or contained with in the limit. 

Reference #115639 for specs and quantity.

D263 RoHs Compliance

A materials buyer requested the following.

I've ordered several items from your company in the past. I am now looking into compliance, and I would like to know whether you would be able to provide RoHS and REACH certificates/declarations for the following products I ordered: 1615 D263 Glass 50.8mm / 550um DSP 1617 D263 Glass 100mm / 500um DSP ID 452 100 mm Test grade ID 444 50.8 mm Test grade.

Reference #259341 for specs and pricing.

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🧾 Example: RoHS Declaration of Conformity (Semiconductor Product)

UniversityWafer, Inc.
11 Elkins Street, Ste 330
South Boston, MA 02127, USA
Phone: +1 (617) 268-2595
Email: sales@universitywafer.com
Website: www.universitywafer.com

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📜 EU DECLARATION OF CONFORMITY

Directive 2011/65/EU (RoHS 2) and (EU) 2015/863 (RoHS 3)

Product Name:
4-Inch Silicon Wafer, Prime Grade

Part Number:
UW-Si100-P-500um-0.001ohm-cm

Product Description:
Monocrystalline silicon wafer, orientation ⟨100⟩, 500 μm thick, polished both sides, ultra-low resistivity < 0.001 Ω·cm. Used in semiconductor fabrication and MEMS research.

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🔒 Compliance Statement:

This product complies with the provisions of the European Union's RoHS Directive 2011/65/EU and its amendment (EU) 2015/863, which restricts the use of certain hazardous substances in electrical and electronic equipment.

Substances restricted under RoHS and their maximum concentration values:

Our product does not exceed these values and contains no intentional use of these restricted substances.

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Place of Issue: South Boston, Massachusetts, USA
Date of Issue: April 24, 2025

Authorized Representative:
Christian Baker
CEO, UniversityWafer, Inc.
Signature: ___________________________

RoHS COMPLIANT ✔️
Conforms to EU Directive 2011/65/EU & (EU) 2015/863
Part #: UW-Si100-P-500um-0.001ohm-cm
Made in USA
www.universitywafer.com

 

What is RoHS Standards?

RoHS stands for Restriction of Hazardous Substances, and it is a product-level compliance directive adopted by the European Union. Its main purpose is to limit the use of specific hazardous materials found in electrical and electronic products.

🔍 What Does RoHS Regulate?

RoHS restricts the use of the following 10 substances:

These limits are typically measured as a percentage of the weight in any homogeneous material (e.g., solder, coating, wire insulation).

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🧭 Purpose and Impact

The goal of RoHS is to:

• Reduce environmental and health risks from hazardous substances.

• Make recycling electronics safer and easier.

• Encourage greener design in electronics manufacturing.

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🏛️ RoHS Scope

RoHS applies to most electrical and electronic equipment (EEE), including:

• Consumer electronics (e.g., TVs, phones)

• IT and telecom equipment

• Lighting

• Medical devices (with certain exceptions or delays)

• Monitoring and control instruments

It applies to products sold in the EU, but many countries have adopted similar standards.

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✅ Compliance

Manufacturers must ensure that their products:

• Pass material testing (XRF analysis, lab reports, etc.)

• Maintain technical documentation showing compliance

• Include a Declaration of Conformity

• Are marked with the CE mark if applicable

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If you're sourcing, selling, or building electronics, especially in the EU market, RoHS compliance is essential to avoid penalties and ensure safe, marketable products.

How to Check for RoHS Compliance

1. Request Compliance Documentation

Ask your supplier or manufacturer for a RoHS Certificate of Compliance or a Declaration of Conformity (DoC) that states the product meets RoHS standards.

The DoC should include:

• Product name/model number

• Manufacturer/importer name and contact info

• Statement of RoHS compliance

• Date and signature of the responsible person

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2. Material Analysis / Lab Testing

If documentation isn’t available or you want to verify yourself:

• Send samples to an accredited lab for X-Ray Fluorescence (XRF) screening.

• For trace-level detection, use wet chemical analysis (ICP-MS or AAS).

This checks whether the hazardous substances exceed the RoHS limits in homogeneous materials (e.g., solder, wire insulation, plastic casing).

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3. Supply Chain Audits

Ensure all components and raw materials used in your product are RoHS-compliant by:

• Maintaining a Bill of Materials (BOM)

• Requiring supplier declarations or material safety data sheets (MSDS)

• Using RoHS-tracking software or platforms (e.g., Assent, GreenSoft)

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🏷️ How to Label a RoHS-Compliant Product

1. RoHS Symbol (optional)

While not legally required, many companies use this symbol to indicate RoHS compliance:

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RoHS ✅ (or "RoHS Compliant") 
                  

Some use a green leaf with a check mark or simply print "RoHS" on the label or packaging.

2. CE Marking (if applicable)

If the product falls under EU directives that require CE marking (e.g., Low Voltage Directive, EMC Directive), RoHS compliance is part of that. In this case:

• Add the CE mark to the product and packaging

• Include RoHS compliance in the product’s technical file

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3. Technical Documentation

You must keep this on file (typically for 10 years after the product is placed on the EU market):

• Test reports

• Supplier declarations

• DoC

• Manufacturing process controls