Method of fabricating electronic cards including at least one printed pattern

An intermediate product involved in a fabrication of electronic cards and comprising:

• a thick sheet incorporating or embedding a plurality of electronic units and a protective coating, the thick sheet defining a respective plurality of card bodies and having on a first surface a corresponding plurality of first patterns printed with an ink,
• wherein the plurality of first patterns is covered with the protective coating having a temporary protective function, the protective coating being arranged in a removable manner on the first surface of the thick sheet so that this protective coating has to be removed prior to assembly m the fabrication of the electronic cards,
• wherein an outlay or a plurality of outlays is/are brought on the plurality of card bodies over the plurality of first patterns and firmly assembled to this plurality of card bodies, and
• wherein a second surface of the thick sheet or an inner surface of the outlay or the plurality of outlays is printed with a plurality of second patterns, the first patterns being of higher definition than the second patterns.