Patent ID: 7770781

Claim:
A bonding method in which members to be bonded are bonded together by carrying out heating and firing in a state where metal nanoparticles are held at a predetermined position between the members to be bonded, wherein a bonding material that includes metal nanoparticles, which are coated with an organic protective film, and a binder is applied to a bonding surface of each of the members to be bonded, the members to be bonded are overlaid and aligned together, the members to be bonded are pressurized together by an applied pressure that is low while the bonding material is heated so as to attain a bonding temperature thereof or higher, a change in a predetermined physical quantity that occurs in any of the members to be bonded, the bonding material, and an ambient atmosphere thereof, or an elapsed time from the initiation of the heating is measured, and at the time point when the change in the physical quantity has reached a certain amount or after the elapse of a certain time, the applied pressure is increased to a high pressure.