Printed circuit board assembly and terminal

A terminal, comprising a printed circuit board assembly, wherein the printed circuit board assembly comprises:

• a first printed circuit board;
• and
• a second printed circuit board, wherein the second printed circuit board is electrically connected to the first printed circuit board through at least four solder joints;
• the at least four solder joints comprise a first solder joint, a second solder joint, a third solder joint, and a fourth solder joint that are sequentially arranged in a predetermined direction, the first solder joint communicates with the second solder joint, the third solder joint communicates with the fourth solder joint, and at least one solder joint and/or at least one printed circuit board cavity is provided between the second solder joint and the third solder joint;
• and
• the printed circuit board cavity is a recess structure that is recessed inwards from a surface of the printed circuit board.