Patent ID: 9620434
Date: 2017-04-11
CPC Classifications: H01L

Claim:
1. A method of bonding a first substrate to a second substrate, the method comprising: disposing a first high melting point metal layer onto a bonding surface of a first substrate; disposing a first low melting point metal layer onto the first high melting point metal layer; disposing a second high melting point metal layer onto a bonding surface of a second substrate; disposing a second low melting point metal layer onto the second high melting point metal layer; applying a plurality of precursor metal particles onto at least one of the first low melting point metal layer and the second low melting point metal layer; positioning the first low melting point metal layer and the second low melting point metal layer such that the plurality of precursor metal particles contacts both the first and second low melting point metal layers; and bonding the first substrate to the second substrate by heating the plurality of precursor metal particles, the first high melting point metal layer, the first low melting point metal layer, the second low melting point metal layer, and the second high melting point metal layer to a bonding temperature for a bonding period to form an intermetallic alloy bonding layer between the first substrate and the second substrate.