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Hello,
I am implementing a slider design following the "AN85951 PsoC4 and PSoC6 MCU CapSense Design Guide".
On the CYC8CKIT-PSOC149 development kit , buttons and slider are covered by solder mask, copper is coated. Hower it is not mentioned in "AN85951 PsoC4 and PSoC6 MCU CapSense Design Guide" that copper should be covered by solder mask.
Is it required to cover copper with solder mask? If so then what is the consequence on the capacity sensor?
Best Regards
Solved! Go to Solution.
- Labels:
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ispn:40045:1:0
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l1:314:1:0
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PSoC4MCU
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Yes it is basically that, a protection from oxidation. For longevity some form of protection is required, it does not have to be a solder mask, but could also be gold plating, etc.
The influence of a <0.1mm thick solder mask is neglectable compared to typical overlay thickness (~3mm).
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Does the solder mask you mentioned in the description is the overlay covered on the sensor?
From your description I don't know what is the solder mask you specified. Can you give me a Figure to clarify it.
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Yes it is basically that, a protection from oxidation. For longevity some form of protection is required, it does not have to be a solder mask, but could also be gold plating, etc.
The influence of a <0.1mm thick solder mask is neglectable compared to typical overlay thickness (~3mm).