Teardrop Design in PCB: Why, Where, When & How?
Learn the practical reasons and best practices for adding teardrop design to PCB layouts—improving reliability, manufacturability, and cost efficiency in your next electronics project.
Why Add Teardrop Designs to PCB?
Stress Reduction:
Reduces mechanical & thermal stress where traces join pads—helping prevent hairline cracks.
BGA Pads:
Some claim teardrops with non-solder mask pads increase ball-to-land contact area and mechanical robustness, but we do not recommend this.
Better Alignment:
Increases PCB manufacturing tolerance for drill-to-pad alignment, making production easier and reducing rejects.
Summary:
Teardrops enhance manufacturability and reliability—especially in high-density or high-stress applications.
Cost Reduction:
Lowers overall board cost by decreasing production failures in complex designs.
Better Resistance:
Improves resistance to thermal shock during rework, wave soldering, and in-field conditions.
Risk Management:
Reduces risk of impact shearing and mechanical failure in harsh environments.
Summary:
Teardrops enhance manufacturability and reliability—especially in high-density or high-stress applications.
Where Should Teardrop Designs Be Added?
- Thru-hole drills where trace-to-pad ratio is small.
- Military or dense boards needing robust annular rings around vias.
- Flex-PCB layouts to minimize stress at trace-pad junctions.
- BGA/via fields (e.g., under BGAs with many vias).
- Where traces exit any pad (solid or with via).
- The narrower the trace, the more important the teardrop.
- Not necessary for conductors wider than 20mil.
Teardrop Designs
Teardrop Designs
How & When to Add Teardrop Designs?
Best Practice:
Request your PCB layout office to add teardrops at the final design stage for uniformity across manufacturers.
Easy Enable:
Many CAD tools offer teardrop addition as a checkbox option—just ask your PCB designer.
RF/High Frequency:
For RF/high-frequency boards, add teardrops at the layout/design stage for full control.
Manufacturing:
PCB manufacturers can also auto-generate teardrops for DFM compliance—provide acceptance if you want this.
Software Recommendation:
In most cases, modern CAD software knows when (and when not) to add teardrops. No need to worry about impossible connections.
Types of Teardrop Design To Add
Snowman
Adds a secondary pad at the trace-pad junction. The smaller pad is offset a few mils from the main pad center, creating a “snowman” look.
Filleting (Straight)
Adds gradual traces from the pad towards the trace—this is the most common teardrop style.
Pad Without Relief
Regular Teardrop Without Pad Relief
Types of Teardrop Design
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