Patent ID: 7935430

Claim:
A bonding structure of a substrate and a component comprising: an electrode contains metal powder, polyester resin, and a curing agent that is equal to or less than 2.5 equivalents assuming that the hydroxyl equivalent of the polyester resin is 1 equivalent; and a low melting point solder that bonds the component to the electrode, wherein the low melting point solder comprises SnBi alloy and has a melting point equal to or lower than 200° C., wherein the metal powder contains at least spherical metal powder and flake metal powder, and the low melting point solder is infiltrated from the surface of the electrode into the electrode by about 5% to 95% of the thickness of the electrode, wherein the component and the substrate, except for the electrode, are at least partially bonded to each other by resin, wherein the resin is a thermosetting resin, wherein the low melting point solder and the thermosetting resin are disposed on at least the electrode as a solder adhesive before heating, wherein the amount of metal powder in the electrode is about 90% to 97.5% by mass, wherein due to the heating, the low melting point solder is aggregated on and infiltrated into the electrode, and the thermosetting resin seeps into a portion on the substrate except for the electrode, and wherein the thermosetting resin is filled between a lower part of the component and the substrate so that the lower part of the component and an upper surface of the substrate are adhered to each other, and a periphery of the component is covered by the thermosetting resin to increase bonding strength.