Heater block for use in a bonder utilizing vacuum suction attachment means

Claim 1

A lead frame bonding machine having a heater block, said heater block comprising a heater block body and a heater plate detachably mounted on said heater block body, and wherein said heater block body comprises: a heating element and a temperature measuring means provided within said heater block; at least two elongated heater plate adhesion grooves extending in an X-direction and a lead frame adhesion hole both formed on a top surface of said heater block, said at least two adhesion grooves and adhesion hole being communicated with a vacuum pump via vacuum passages formed inside said heater block body, said at least two heater plate adhesion grooves being parallel and spaced apart with said lead frame adhesion hole provided therebetween; and X-direction positioning surfaces formed on upper ends of both side surfaces of said heater block and a Y-direction positioning ridge projected at one end of said top surface of said heater block; and said heater plate comprises: a recess formed on the top surface and a suction port provided on the under surface, said recess of suction port being communicated with each other via a plurality of through holes, said suction port being provided in said heater plate such that it corresponds to said lead frame adhesion hole; and positioning projections projecting downwardly from both side surfaces; whereby said heater plate is placed on said top surface of said heater block with the positioning projections engaged with said X-direction positioning surfaces of said heater block body and one end engaged with said Y-direction positioning ridge of said heater block body, respectively, so that said heater plate is held on said heater block body by vacuum adhesion force provided by said vacuum pump.