Silkscreen Layer: Line Width 0.15mm minimum

Component Specifications

Definition

The silkscreen layer, also known as the legend or nomenclature layer, is a non-conductive printed layer applied to the surface of a heavy copper PCB. It serves as a visual reference for component placement, orientation, and identification during assembly and maintenance. In heavy copper PCBs, this layer must withstand higher thermal and mechanical stresses due to increased copper thickness and potential heat dissipation requirements.

Working Principle

The silkscreen layer is created by applying a specialized ink or epoxy through screen printing, inkjet printing, or laser marking processes onto the PCB surface. The markings are cured through thermal or UV processes to create durable, legible identifiers that resist environmental factors and handling.

Materials

High-temperature resistant epoxy ink (typically white, black, or yellow), UV-curable ink, or laser-markable coatings. Must withstand soldering temperatures (260-300°C) and chemical exposure.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Adhesion	≥3B per ASTM D3359
Line Width	0.15mm minimum
Ink Thickness	10-25 microns
Character Height	1.0mm minimum
Chemical Resistance	Resistant to flux, cleaning solvents
Temperature Resistance	Withstands 300°C for 30 seconds

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 9001, IPC-6012, IPC-A-600, IEC 61189-5

Parent Products

This component is used in the following industrial products

Heavy Copper PCB

A printed circuit board with copper thickness significantly greater than standard PCBs, designed for high-current applications and enhanced thermal management.

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Engineering Analysis

Risks & Mitigation

Ink smearing during assembly
Poor adhesion to copper surface
Legibility issues under thermal stress
Chemical degradation from cleaning processes

FMEA Triads

Trigger: Insufficient ink curing
Failure: Silkscreen smearing during handling or assembly
Mitigation: Implement proper curing protocols and quality checks for ink adhesion

Trigger: Ink contamination on solder pads
Failure: Poor solder joint formation
Mitigation: Maintain minimum clearance (0.2mm) between silkscreen and solderable areas

Trigger: Thermal expansion mismatch
Failure: Silkscreen cracking or delamination
Mitigation: Use thermally matched materials and controlled application thickness

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1mm positional accuracy, ±10% ink thickness variation

Test Method

Visual inspection per IPC-A-600, adhesion tape test per ASTM D3359, thermal cycling test per IPC-TM-650

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Silkscreen Layer

Manufacturer profiles associated with Silkscreen Layer.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

Why is silkscreen important for heavy copper PCBs?

Silkscreen provides critical visual guidance for component placement and orientation, especially important in heavy copper PCBs where components may handle higher currents and require precise thermal management.

What materials are used for silkscreen on heavy copper PCBs?

High-temperature epoxy inks are standard, capable of withstanding the elevated temperatures during soldering and operation of heavy copper PCBs, which often involve higher thermal loads.

Can silkscreen affect PCB performance?

Properly applied silkscreen has minimal electrical impact but must maintain adequate clearance from conductive traces to prevent contamination or short circuits, especially in high-voltage applications.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Silkscreen Layer