Patent ID: 6320163
Filing Date: 2001-11-20
Classification: B23K,G06F

Abstract:
An apparatus for removing circuit chips from an assembly including a plurality of chips each attached to a respective substrate by solder material, comprising:a fixture for holding each of said substrates having one of said chips thereon wherein said chips are soldered to a bottom surface of said substrates and thereby face down from said substrates, said fixture adapted for holding said substrate and chips while a static shear force is applied to each of said chips;a furnace for applying heat to each of said substrates having said chips thereon in a sequential manner;said static shear force being applied in a sequential manner to said substrates having said chips thereon such that the first heated substrate and chip are separated with said chip falling by gravity, followed by the second heated substrate and chip being separated with said chip also falling by gravity and so forth, said separation of said chips and substrates occurring while said substrates and chips are heated below the melting temperature of said solder attaching said chips to said substrates.