Patent ID: 8105452

Claim:
A bonding method of bonding a first object to be bonded and a second object to be bonded by welding which utilizes ultrasonic vibration, the method comprising: placing the second object to be bonded on an upper surface of the first object to be bonded; pressing a contact portion provided in a bonding member onto the second object to be bonded while holding an upper surface of the second object to be bonded by a holding portion provided in the bonding member; and ultrasonically vibrating the bonding member to ultrasonically vibrate the second object to be bonded, thereby welding the first object to be bonded and the second object to be bonded, wherein the bonding member is ultrasonically vibrated in a state where an unleveled portion provided in the bonding member is engaged with an unleveled portion provided in the second object to be bonded, wherein the first object to be bonded is an electrode provided on a surface facing an inspection object, in a probe card inspecting an electric characteristic of the inspection object, wherein the second object to be bonded is a probe pin brought into contact with the inspection object, in the probe card, wherein the unleveled portion of said bonding member is composed of a flat plane provided in a tip portion of said bonding member and a projecting portion projecting from the flat plane immediately adjacent to the unleveled portion, wherein the flat plane is the contact portion, and wherein the projecting portion is the holding portion.