Electronic component assembly

An electronic component assembly comprising:

• a first electronic component including a plurality of first electrodes provided on a first surface of the first electronic component;
• a second electronic component including a plurality of second electrodes provided on a first surface of the second electronic component;
• a resin including a solder powder provided on the first surface of the electronic component between the first electronic component and the second electronic component;
• solder connections disposed between the first electrodes on the first surface of the first electronic component and the second electrodes on the first surface of the second electronic component to electrically interconnect the first electrodes on the first electronic component and the second electrodes on the second electronic component;
• and
• at least one recessed portion in the first surface of the first electronic component, the recessed portion being free of solder material, and the recessed portion being located in an area of the first surface of the first electronic component that is not occupied by the first electrodes and is adjacent to the first electrodes,
• wherein the at least one recessed portion is provided for bubble generation and has a tapered shape with a taper angle of less than 90 degrees.