Touch control hob (electric stove)
Most likely it is a capacitive switch, and the IC is a combination of amplifier and flip-flop (or scr) circuit that works with the capacitor.  If you can provide the wiring diagram, I should be able to tell you if a "regular" switch can be used to replace them.  

It now appears that the switches are the contact type. I would recommend first to clean the contact surfaces of the switches with alcohol and lint free cloth. If this does not make them work better, then use a momentary push button switch by connecting it across the corresponding contacts.  However, making space for each micro switch might become a problem.  You might want to replace only those that are giving you problems.