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PSoC 4 MCU

New Contributor

Hello all. i m testing a CY8CMBR2016-24LQXI bsed keypad board. I m a bit confused about the touch sensitivity. The touch pads on pcb has Green masking.  And when i touch over it, it is sensed and corresponding output is made. I m confuse about "OVERLAY " as mentioned in related documents. Is the green mask over the touch pads is here considered as overlay ? Or i can use any other material as OVERLAY ? I have tried placing a adhesive sticker over the touch pads with almost zero gap for air, but it doesnt work. But without the sticker, touch pads works fine. BTW i will  be using a individual membrane/cover to cover the keypad,once i am clear about the overlay part.

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Employee

Hi,

I assume you are using a custom board. Please confirm.

In general, you can refer to overlay selection (Section 4.1) of https://www.cypress.com/file/45461/download

It provides detailed explanation on the type of overlay material and thickness. I hope this helps.

Thanks,

Shanmathi

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1 Reply
Employee

Hi,

I assume you are using a custom board. Please confirm.

In general, you can refer to overlay selection (Section 4.1) of https://www.cypress.com/file/45461/download

It provides detailed explanation on the type of overlay material and thickness. I hope this helps.

Thanks,

Shanmathi

View solution in original post

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