Patent ID: 9583459
Date: 2017-02-28
CPC Classifications: G06K,H01L,H05K

Claim:
1. A method for fabricating a printed circuit for smart card electronic module comprising the production of a composite comprising a first and a second layers of electrically conductive material, attached to an insulating substrate and furthermore comprising at least one bonding hole extending in the insulating substrate between a bottom at least partially closed by the first layer of conductive material and an opening opening into one side of the insulating substrate, and the production by photolithography and etching of patterns on the second layer of electrically conductive material, characterized by the fact that it furthermore comprises an operation of protecting the bonding hole with a soluble material during a step distinct from the production of patterns on the second layer of electrically conductive material and by the fact that the production of patterns on the second layer of electrically conductive material leaves an area of at least ten microns around the bonding hole devoid of the electrically conductive material of the second layer of electrically conductive material.