Heller Industries Inc. | https://hellerindustries.com/wp-content/uploads/2018/07/last-will-of-bga-void.pdf
Test Vehicle Assembly The test vehicles were assembled at the Rockwell Collins Coralville production facility. An MPM Ultra Print 2000 automated stencil printer using a 0.005 inch thick stainless steel stencil applied solder paste to the test vehicles