Patent ID: 7269197

Claim:
Apparatus, comprising a stacked bar pair, wherein: the bar pair comprises first and second device bars, each bar having an array of semiconductor devices; each of the first and second device bars comprises one or more facets coated with one or more coating materials; the first device bar is bonded to the second device bar; and each of the first and second device bars has a first side and a second side, wherein: for each bar, the first side comprises a first plurality of pads corresponding to the semiconductor devices; and the first bar is aligned with respect to the second bar such that at least some of the pads from the first plurality of the first bar are mated to at least some of the pads from the first plurality of the second bar, wherein the mated pads are bonded by a solidified solder bond; for each bar, the second side comprises a second plurality of pads corresponding to the semiconductor devices; and at least one of the second sides of the first and second bars comprises a pattern formed by a coating material used for the facet coating, wherein said pattern substantially conforms to a profile of the second plurality of pads.