INDUSTRY COMPONENT

Silkscreen

Silkscreen is a printed layer on PCBs that provides component placement guides, labels, logos, and other identification markings using ink.

Component Specifications

Definition
Silkscreen, also known as legend printing, is a non-conductive ink layer applied to the surface of printed circuit boards (PCBs) through screen printing or inkjet printing processes. It serves as a visual reference layer containing alphanumeric identifiers (reference designators like R1, C2), polarity indicators, component outlines, test points, company logos, part numbers, and assembly instructions. This layer is typically applied after solder mask application and helps technicians during manual assembly, inspection, testing, and troubleshooting by clearly marking component positions and orientations on the board.
Working Principle
Silkscreen application operates on printing principles where ink is transferred through a patterned screen (traditional screen printing) or deposited via precise nozzles (inkjet printing) onto the PCB surface. The ink is then cured through thermal or UV processes to create permanent, legible markings that withstand subsequent manufacturing steps and environmental conditions.
Materials
Epoxy-based inks (most common), liquid photoimageable (LPI) inks, or UV-curable inks. Materials must exhibit properties like adhesion to solder mask/surface finishes, chemical resistance, thermal stability (surviving reflow temperatures up to 260°C), and appropriate color contrast (typically white, yellow, or black).
Technical Parameters
ParameterTypical rangeNotes & selection driver
Line Width0.15mm minimum
Color OptionsWhite, Yellow, Black
Curing MethodUV or Thermal
Ink Thickness10-25 microns
Character Height1.0mm minimum (0.8mm for high-density)
Adhesion Strength≥3B per ASTM D3359
Thermal ResistanceWithstands 260°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
IPC-4781, IPC-6012, ISO 9001, IEC 61189-5

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Ink smearing during handling
  • Poor legibility due to resolution limits
  • Adhesion failure in humid environments
  • Misalignment causing assembly errors
  • Ink contamination of solderable surfaces
FMEA Triads
Trigger: Insufficient ink curing
Failure: Ink smudging or wiping off during handling
Mitigation: Implement proper curing parameter controls and adhesion testing
Trigger: Screen/printhead misalignment
Failure: Markings overlapping with solder pads or being unreadable
Mitigation: Use optical alignment systems and implement regular calibration procedures
Trigger: Ink viscosity variation
Failure: Inconsistent line definition and poor resolution
Mitigation: Maintain controlled ink storage conditions and implement viscosity monitoring

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±0.1mm positional accuracy, ±0.05mm line width variation
Test Method
Visual inspection per IPC-A-610, adhesion tape test per ASTM D3359, thermal shock testing 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

Manufacturer profiles associated with Silkscreen.

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Edge Connector
Edge connector is a printed circuit board (PCB) connector that mates with the edge of another PCB, commonly used in high-speed memory modules for reliable electrical connections.

Frequently Asked Questions

What is the primary purpose of silkscreen on a PCB?

To provide visual guidance for component placement during assembly, identify components with reference designators, indicate polarity/orientation, and display logos/testing information.

Can silkscreen be applied over solder pads or vias?

No, silkscreen must avoid conductive areas like solder pads and vias to prevent interference with electrical connections and soldering processes.

What are common silkscreen color options and when are they used?

White is standard for most boards, yellow provides better contrast on dark solder masks, and black is used on light-colored substrates or for specific aesthetic requirements.

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.

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