Microelectronic device and circuit board thereof element thereof

A microelectronic device, comprising:

• an accommodating housing including an accommodating space therein;
• a circuit board disposed within the accommodating space and including:
• a first end surface including at least one first conductive contact;
• a second end surface opposite to the first end surface;
• and
• at least one receiving hole located on a lateral side of the circuit board and being a half-open hole extending from the second end surface, a surface of the at least one receiving hole including a second conductive contact, and the second conductive contact passing through at least one internal power layer of the circuit board to be electrically connected to the first conductive contact;
• at least one electronic component disposed on the first end surface and electrically connected to the at least one conductive contact;
• and
• at least one conducting wire having one end disposed within the at least one receiving hole, and the at least one conducting wire being electrically connected to the second conductive contact.