Abstract: A system of examination of a semiconductor specimen, comprising a processor and memory circuitry (PMC) configured to: obtain an image of a hole formed in the semiconductor specimen, wherein the hole exposes at least one layer of a plurality of layers of the semiconductor specimen, segment the image into a plurality of regions, generate at least one of: data Dpix_intensity informative of one or more pixel intensities of one or more regions of the plurality of regions, data Dgeometry informative of one or more geometrical properties of one or more regions of the plurality of regions, feed at least one of Dpix_intensity or Dgeometry to a trained classifier to obtain an output, wherein the output of the trained classifier is usable to determine whether the hole ends at a target layer of the plurality of layers.

Abstract: A combination product cooling and flux management apparatus is mounted above a reflow soldering oven. The apparatus has a sealed housing with four openings: an ambient air inlet, an ambient air outlet, a recirculating gas inlet and a recirculating gas outlet. The recirculating gas blower is mounted in a first end of the housing and draws air into the recirculating gas inlet, through a recirculating gas side of a gas-to-gas heat exchanger and out the recirculating gas outlet, where it is recirculated through a product cooling chamber and back into the recirculating gas inlet. The ambient air blower is mounted in a second end of the housing and draws air into the ambient air inlet, through an ambient air side of the gas-to-gas heat exchanger and out the ambient air outlet to the surrounding atmosphere.

Abstract: A combination product cooling and flux management apparatus is mounted above a reflow soldering oven. The apparatus has a sealed housing with four openings: an ambient air inlet, an ambient air outlet, a recirculating gas inlet and a recirculating gas outlet. The recirculating gas blower is mounted in a first end of the housing and draws air into the recirculating gas inlet, through a recirculating gas side of a gas-to-gas heat exchanger and out the recirculating gas outlet, where it is recirculated through a product cooling chamber and back into the recirculating gas inlet. The ambient air blower is mounted in a second end of the housing and draws air into the ambient air inlet, through an ambient air side of the gas-to-gas heat exchanger and out the ambient air outlet to the surrounding atmosphere.