Optical element driving mechanism

An optical system, comprising:

• a first assembly comprising a first welding portion, wherein the first welding portion comprises a first welding surface;
• a second assembly affixed on the first assembly and comprising:
• a bottom comprising a first surface, a second surface, and a third surface, wherein the first surface and the second surface face different directions, and the second surface and the third surface face an identical direction;
• a circuit assembly disposed in the bottom, comprising:
• a first circuit element disposed in the bottom and partially exposed from the first surface;
• a second circuit element disposed in the bottom, partially exposed from the second surface, and comprising a second welding portion, wherein the second welding portion comprises a second welding surface perpendicular to the first welding surface;
• and
• a third circuit element disposed in the bottom and partially exposed from the third surface;
• a movable portion disposed in the first assembly and the second assembly and used for holding an optical element having an optical axis,
• wherein when viewed along the optical axis, the first assembly does not overlap the second welding portion, and a normal direction of the first welding surface is perpendicular to the optical axis;
• and
• wherein the first welding portion is affixed on the second welding portion by welding.