What is the recommended 4-layer configuration?

[Anonymous]

From the documentation, i found this recommended layer stackup:

1. Cap sensors

2. Sense traces

3. Hatched ground plane

4. PSOC and non-capsense related traces

My question is this - should layer 2 have a ground plane around the sense traces, or should layer 2 consist of ONLY the sense traces, and no other copper?

[BragadeeshV · Accepted solution]

Hello Ari,

Use the following guidelines for 4 layer PCB

1. Top layer - Hatch fill and sensors

2. 2nd Layer - Only sensor traces, no hatch fill

3. 3rd layer - Hatch fill

4. Bottom layer- PSoC and non capsense trace

Please refer to http://www.cypress.com/file/41076/download  ( Getting started with Capsense) Pg no 80

Regards,

Bragadeesh