Silkscreen placement rules in PCB Design - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the primary purpose of silkscreen on a PCB?

Silkscreen provides labels and markings on the PCB to help identify components and orientation during assembly and troubleshooting.

beginner

Why must silkscreen not overlap with solder pads or vias?

Because overlapping silkscreen on pads or vias can interfere with soldering and cause poor electrical connections.

intermediate

What is a common minimum clearance distance recommended between silkscreen and pads?

A typical minimum clearance is about 0.15 mm (6 mils) to avoid soldering issues.

intermediate

How does silkscreen placement affect automated PCB assembly?

Proper silkscreen placement helps machines and operators identify parts quickly, reducing errors and speeding up assembly.

beginner

What should be avoided when placing silkscreen near component outlines?

Avoid placing silkscreen too close to component outlines to prevent confusion and ensure clear visibility of parts.

What is the main reason to keep silkscreen away from solder pads?

A To prevent soldering problems

B To improve PCB color

C To reduce PCB weight

D To increase electrical conductivity

Silkscreen on solder pads can cause soldering defects by blocking solder flow.

What is a typical minimum clearance between silkscreen and pads?

A 0.05 mm

B 0.5 mm

C 1 mm

D 0.15 mm

About 0.15 mm (6 mils) clearance is recommended to avoid soldering issues.

Which of these should silkscreen NOT cover?

A Solder pads

B Component outlines

C Reference designators

D Polarity marks

Silkscreen must not cover solder pads to ensure proper soldering.

How does silkscreen help during PCB assembly?

A By increasing PCB thickness

B By identifying components and orientation

C By improving electrical signals

D By reducing manufacturing cost

Silkscreen labels help identify parts and their correct placement.

What happens if silkscreen overlaps vias?

A Improves heat dissipation

B No effect

C Can cause soldering defects

D Enhances signal quality

Silkscreen on vias can interfere with soldering and cause defects.

Explain why silkscreen clearance from pads and vias is important in PCB design.

Think about how solder flows during assembly.

Describe how proper silkscreen placement improves the PCB assembly process.

Consider the role of silkscreen for technicians and machines.