Abstract: A bonding structure and a power device. The bonding structure includes a first power unit and at least two bonding wires. At least one end of the bonding wire is connected to the first power unit through bonding. Projections that are of lead paths of the at least two bonding wires and that are on a preset plane have at least one intersection point. Spatial cross wire bonding is performed on the bonding wires, so that lead paths of the bonding wires form an angle with each other, thereby weakening electromagnetic force between the bonding wires. Therefore, fatigue due to fluctuating stress of the bonding wires can be alleviated, service lives of the bonding wires can be prolonged, and bonding effect can be ensured to a maximum extent.

Abstract: A packaged device includes a circuit board, an electronic component, and a heat storage portion. The electronic component is electrically coupled to the circuit board; and the heat storage portion is disposed on the circuit board or embedded in the circuit board, and the heat storage portion is adjacent to the electronic component, where a specific heat capacity of the heat storage portion is higher than a specific heat capacity of the circuit board, and the heat storage portion is configured to store and release heat. A heat storage material with a relatively high specific heat capacity is introduced into the packaged device, and the heat storage portion is disposed on the circuit board around the electronic component where a large amount of heat generated by the electronic component in a short time can be quickly stored in the heat storage portion and then released to the outside.

Abstract: The present disclosure discloses an optical imaging lens group including, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having reactive power. The first lens has positive refractive power, a convex object-side surface, and a concave image-side surface. A total effective focal length f of the optical imaging lens group and half of a maximal field-of-view Semi-FOV of the optical imaging lens group satisfy: f*tan(Semi-FOV)>7.5 mm. A distance TTL along the optical axis from the object-side surface of the first lens to an imaging plane of the optical imaging lens group and half of a diagonal length ImgH of an effective pixel area on the imaging plane of the optical imaging lens group satisfy: TTL/ImgH<1.3.

Abstract: The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having refractive power, a concave object-side surface and a concave image-side surface; a second lens having positive refractive power; a third lens having refractive power and a convex object-side surface; a fourth lens having positive refractive power; and a fifth lens having negative refractive power. An effective focal length f1 of the first lens and a radius of curvature R1 of the object-side surface of the first lens satisfy 0.7?f1/R1<1.5.

Abstract: The present disclosure discloses an optical imaging lens group including, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having reactive power. The first lens has positive refractive power, a convex object-side surface, and a concave image-side surface. A total effective focal length f of the optical imaging lens group and half of a maximal field-of-view Semi-FOV of the optical imaging lens group satisfy: f*tan(Semi-FOV)>7.5 mm. A distance TTL along the optical axis from the object-side surface of the first lens to an imaging plane of the optical imaging lens group and half of a diagonal length ImgH of an effective pixel area on the imaging plane of the optical imaging lens group satisfy: TTL/ImgH<1.3.