Patent ID: 8020288

Claim:
A method for producing an electronic subassembly including at least one electronic component affixed on a circuit board, as well as at least one circuit track structure by which the at least one electronic component is contacted, the method comprising: affixing the at least one electronic component on an insulating layer of a conductive foil, the active side of the at least one electronic component pointing in the direction of the conductive foil; laminating the conductive carrier foil having the affixed at least one electronic component onto a circuit board substrate, the at least one electronic component pointing in the direction of the circuit board substrate; and providing a circuit track structure by structuring the conductive foil and contacting the at least one electronic component; wherein the at least one electronic component is pressed into the insulating layer of the conductive foil to a selected depth to form passages such that plated-through holes connecting the at least one electronic component to the circuit track structure have an aspect ratio in the range of 1 to 3; wherein at least one of the following is satisfied: (i) the insulating layer of the conductive foil is made of a material having an expansion coefficient value between the expansion coefficient value of the circuit board substrate and the expansion coefficient value of the circuit track structure; (ii) the at least one electronic component requiring small passages in the insulating layer for the contacting with the circuit track structure are pressed deeper into the insulating layer than the at least one electronic component requiring larger passages in the insulating layer; and (iii) the circuit track structure provided by structuring the conductive foil is spread open prior to mounting an additional circuit track structure.