Wendy,

I agree with your assessment. The coupon should be representative of the 
design. the 1-3 via structure sees different stresses than what will be 
shown by separating the structures.

Gary

On 6/17/2010 6:30 PM, Wendi Boger wrote:
>   Need clarification on the definition of Via Structures as is relates to
> Microsection Requirements.
>
>
>
> 3.6.1.5 Microsection Requirements
>
>
>
>              ..... Evaluation of all applicable PTHs and vias, including
> blind and buried, for all such structures found on the finished printed
> board shall be inspected in the vertical cross section in accordance
> with Table 4-3. ...
>
>
>
>   If a board has 1-2 lasers and 1-2-3 stacked lasers is it correct to
> have 2 coupons one as 1-2 and one as 2-3.  Both drill cycles and plating
> cycles are represented but the 1-2-3 total via structure is not.   Seems
> like the 1-2 and 2-3 only is bending the intent.
>
>
>
>
>
> Wendi
>
>
>
>
>
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