Method and apparatus for application of spray adhesive to a lead

Details Method and apparatus for application of spray adhesive to a lead Method and apparatus for application of spray adhesive to a lead

1998-01-29

2000-08-01

Aftergut, Jeff H.

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

Automatic and/or material-triggered control

156356, 156381, 156578, 156362, 156363, 118301, 118504, B32B 3110, B05B 1302

Patent

active

060961635

ABSTRACT:
An apparatus and method for evenly applying an atomized adhesive for bonding a die to a leadframe is disclosed. In one embodiment, the apparatus includes a hood in communication with an air supply and a vacuum plenum. The hood and vacuum plenum encompass a semiconductor device component located in a target area during adhesive application so that the adhesive is selectively applied to specific portions of the leadframe or other semiconductor device component and adhesive is not allowed outside the system. A mask or stencil may be employed to further prevent the application of adhesive to undesired areas. An air purge may be employed to direct the adhesive mist toward the component to be coated. In another embodiment, a fine adhesive spray is directed against the surface of the workpiece to be coated, selected areas being masked to prevent coating. Wafers may be coated as well as leadframes.

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