Ray Cirimele Samples were prepared using BGA Daisy Chain Test Chips from Amkor with 484 I/O and pads at a 1.0 mm pitch. The daisy chain test cards are a single sided FR4 material with 1 oz. copper and a HASL finish. The card pad size is .025 with a 1mm pitch. As the BGA is configured, two patterns of the Daisy Chain run adjacent to a third common pattern. Insulation resistance measurements were made from each of the individual patterns to the common. Each of the sample boards contains four devices. This gives a total of 8 measurements per board. With two different boards and two different BGA attachment techniques gives a total of 16 total measurements for the testing. Only 15 total measurements could be made due to a short between one of the daisy chain patterns and common on the non-StencilQuik™ test card...
ProntoVIEW-MARKUP is assembly viewer software used by electronics manufacturers to quickly find components, pin, shorts between traces, etc. ProntoVIEW-MARKUP is also a redline tool that allows annotation of the assembly to create work and assembly instructions, first article inspection, etc.
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