Patent ID: 7159752
Filing Date: 2007-01-09
Classification: B22F,B23K,B41J,G01N,H01L,H05K

Abstract:
1. A liquid solder jet apparatus for depositing a stream of liquid solder droplets on selected bond pads of at least one semiconductor die of a substrate having a surface having a plurality of locations of contact pads thereon extending throughout the surface, each location of the plurality of locations on the surface having a start point and an endpoint, comprising: a continuous stream generator for producing a stream of liquid metal solder droplets, the liquid metal solder droplets having a uniform size within a consistent predetermined range, the consistent predetermined range of uniform size metal solder droplets being within a size of the selected bond pads of the at least one semiconductor die and the contact pads of the substrate; a stream director for selectively directing the stream of liquid metal solder droplets after being produced by the continuous stream generator onto the selected bond pads of the at least one semiconductor die of the substrate, the stream director comprising a raster scanner scanning the stream of liquid metal solder droplets, the raster scanner including: a reservoir for holding liquid metal solder; a vibrator for causing formation of the stream of liquid metal solder droplets; and a temperature controller connected to the reservoir for maintaining the liquid metal solder in a liquid state.