A quick reference for via protection structures. Images are placeholders—replace with your uploaded assets.
| Via Type | Definition | Image |
|---|---|---|
| Tented Via (Type I Via) | A via with a dry film mask material applied bridging over the via wherein no additional materials are in the hole.Single Sided Tented Not Recommended.
|  |
| Tented and Covered Via (Type II Via) | A Type I via with a secondary covering of mask material applied over the tented via.Single Sided Tented and Covered Not Recommended. |  |
| Plugged Via (Type III Via) | A via with material applied allowing partial penetration into the via. Single Sided Plugged Not Recommended.
|  |
| Plugged and Covered Via (Type IV Via) | A Type III via with a secondary covering of material applied over the via.Single Sided Plugged and Covered Not Recommended.
|  |
| Filled Via (Type V Via) | A via with material applied into the via targeting a full penetration and encapsulation of the hole.
|  |
| Filled and Covered Via (Type VI Via) | A Type V via with a secondary covering of material (liquid or dry film soldermask) applied over the via.
|
|
| Filled and Capped Via (Type VII Via) | A Type V via with a secondary metallized coating covering the via. The metallization is on both sides.
|  |
Note: Single-sided tented/plugged variants are generally not recommended for reliability.
Get DFM Review (Free, 24h)
 | Download our design guidesfor better PCB designing and manufacturing These are some of the design guides designers and engineersdownload the most:
|
Proven by 7 industries, 4000+ customer projects
Please contact us at sales@knownpcb.com, ask for engineering support here or use the form below to reach out to KnownPCB | Get In Touch Today |
