Printed circuit board assembly including interposer circuit

A printed circuit board assembly comprising:

• a first printed circuit board;
• a second printed circuit board;
• a first interposer circuit at least partially surrounding a first space between the first printed circuit board and the second printed circuit board;
• and
• a thermally conductive material arranged within the first space,
• wherein the first interposer circuit has a first ventilation path through which air moves from the first space to the outside of the printed circuit board assembly when the thermally conductive material is injected into the first space through a first hole formed in the first printed circuit board,
• wherein the first ventilation path connects a first end formed at an outer side, facing the outside of the printed circuit board assembly, of a first portion of the first interposer circuit, to a second end formed at an inner side, facing the first space, of the first portion of the first interposer circuit, and
• wherein the length of the first ventilation path is greater than the width of a part of the first interposer circuit in which the first ventilation path is formed.