Patent ID: 8118209

Claim:
An ultrasonic welding method comprising: providing an anvil with a terminal clamp comprising an electrical contact part including a pair of opposed edges and connected to an electronic device, stacking a core wire constructed by bundling plural strands on a core wire weld part extending from the electrical contact part, and mutually welding the core wire to the core wire weld part by applying ultrasonic vibration in a state of pinching the core wire and the core wire weld part between the anvil and the chip and pressurizing the core wire and the core wire weld part in a direction of approaching each other, wherein in the stacking step, a terminal of the core wire is arranged in a position close to a core wire protrusion prevention wall comprising a pair of opposed edges which extend outwardly beyond the pair of opposed edges of the electrical contact part to prevent the terminal of said core wire from moving to a place overlapping with the electrical contact part.