(under subclass 48) Process for making a semiconductor device responsive to a chemical reaction or the presence of a particular chemical or concentration thereof (e.g., pH level, etc.) in close proximity to the device.
SEE OR SEARCH CLASS
257, Active Solid-State Devices (e.g., Transistors, Solid-State Diodes),
225, 253, and 414+ for an active solid-state device responsive to a nonelectrical signal.
