Test cell for laminate and method

A module including:

• a laminate comprising:
• a plurality of buildup layers disposed on a core;
• a plurality of unit cells defined in the buildup layers, each unit cell including:
• at least one electrically conductive test via that passes electricity through at least three of the buildup layers and that is electrically connected to testing locations on a probe accessible location of the laminate, the test via including a separate probe accessible location for each build up layer that the test via passes through;
• and
• two or more dummy vias electrically connected to the at least one test via, wherein the probe locations are electrically connected to both the test probe and at least one of the dummy vias;
• wherein the dummy vias are arranged in the unit cell at one of a plurality of distances from the test via;
• wherein each separate probe accessible location is connected to the test via by a trace that passes through one of the dummy vias;
• and
• a die connected to the laminate.