On-die parametric test modules for in-line monitoring of context dependent effects

A semiconductor wafer, comprising:

• a substrate having a semiconductor surface defining a plurality of die areas;
• a functional integrated circuit (IC) formed on an IC portion of each said die area, said functional IC comprising a plurality of circuit elements configured for performing a circuit function;
• and
• an on-die parametric test module formed on a test module portion of each said die area different from said IC portion, said on-die parametric test module comprising:
• a reference layout that includes at least one active reference MOS transistor, said active reference MOS transistor having a reference spacing value for each of a plurality of context dependent effect parameters, and
• a plurality of variant layouts, each variant layout providing at least one active variant MOS transistor that provides a variation with respect to said reference spacing value for a different at least one of said context dependent effect parameters.

A method of generating in-line data for monitoring context dependent effect parameters for MOS devices, comprising:

• providing a substrate having a semiconductor surface defining a plurality of die areas, a functional integrated circuit (IC) formed on an IC portion of each said die area including circuit elements for performing a circuit function, and an on-die parametric test module formed on a test module portion of each said die area different from said IC portion;
• wherein said on-die parametric test module comprises a reference layout that includes at least one active reference MOS transistor, said active reference MOS transistor having a reference spacing value for each of a plurality of context dependent effect parameters, and a plurality of variant layouts, each variant layout providing at least one active variant MOS transistor that provides a variation with respect to said reference spacing value for a different at least one of said context dependent effect parameters;
• testing a plurality of said on-die parametric test modules to obtain electrical test measurement data from each of said on-die parametric test modules comprising measurement data from a respective said active reference MOS transistor and measurement data from respective ones of said active variant MOS transistors;
• and
• processing said electrical test measurement data to generate measurements for said plurality of said context dependent effect parameters.