ST STM32F0 Series Application Note

5.6.2 Electrode not located on PCB
It is possible but it is not recommended, because when the electrode it isn't located on PCB, the sensitivity
decreases and additional extra parasitic capacitances are added.
Figure 14. Electrode not located on PCB example
Front panel
(plexiglass or
other suitable
material)
Controller
PCB
Spring
Printed
electrode
PCB pad
Flex PCB
Flex
connector
ACF/ACP
connection
Spacer (cylinder
of hard foam or
other suitable
material)
Printed
electrode
(optional)
Table 12. Electrode documentation gives a list of documents containing information about the electrode .
Table 12. Electrode documentation
Id
Title Chapters
AN4312
Guidelines for designing touch sensing applications
with surface sensors
Using electrodes separated from the PCB
AN5105
Layout and PCB
AN5105 - Rev 1
page 16/52

ST STM32F0 Series Specifications

General

Brand	ST
Model	STM32F0 Series
Category	Microcontrollers
Language	English