Bonding apparatus
AssigneeThe Bendix Corporation
InventorsGerald C. Smith, Dennis L. Ellingson, Colin A. Johnson, Seong K. Rhee
Life of this patent
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Abstract
A bonding head for connecting the electrically conductive leads of a tape cable or the like to other electrical conductors. The bonding head, which applies heat and pressure to the electrical conductors and leads to bond them together, is an elongated member comprised of a material having high mechanical strength but low thermal conductivity which contains a conduit comprised of a material having low mechanical strength but high thermal conductivity. A heating element inserted in the conduit supplies heat to the conduit and bonding head. This arrangement provides a bonding head having a high mechanical strength and hence structural failure and deformation of the bonding head is reduced.
Claims15
A bonding apparatus comprising:
- an elongated body having a longitudinal axis, a longitudinal passage, a first side, a second side opposite said first side, a third side adjacent to and extending between said first and second sides, and a tapered portion comprised of two sides tapering towards each other from said first and second sides respectively and terminating in a sixth surface which is opposite said third side, said elongated body comprised of a material having a thermal conductivity K in units of Btu/(hr)(sq ft)(.degree.F/in.) at 70.degree. F of less than 100,
- a conduit having a bore, said conduit mounted in the longitudinal passage of said elongated body, said conduit comprised of a material having a thermal conductivity at 70.degree. F of greater than 2000.
A bonding apparatus comprising:
- an elongated body having a longitudinal passage and a bonding surface, said elongated body comprised of a material having a thermal conductivity K1, and a tensile strength T1;
- and
- an elongated member mounted within said bore, said member having a longitudinal axis and a longitudinal bore, said member comprised of a material having a thermal conductivity K2 at least two times greater than the thermal conductivity of said body and having a tensile strength T2 which is less than the tensile strength of said body.
Dependencies are inferred from the claim text.