Its hard to see if there is any seperation or not, atleast for me 
The user interface on the other side has 9 buttons which corrspond to the Tx marks on the back.
The white frame you can see has some sort of sikicon blobs that are "connected" to small bumps on the PCB, I guess its measures the temperature to detect if the button is touched?
Also interesting to know that this is/could be considered a keyboard. Where exactly is the diffrence in the defintion of a keyboard and a touchpad? Does a "real" touchpad has to send x,y values instead of something like "button x" pressed?