1.011.1_VPC使用手册.pdf - 第47页

46/144 After clicking "OK" the next two diagrams are opened. This time they are scaled according to analysis procedures. Also here, the familiar filter settings (tim e filter and inspection plan filter) can be …

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procedure can be further evaluated according to analysis procedures, to get the

analysis name. When the left bar is clicked the following mask appears:

The number of defects (98), the feature (10002 = pseudo defect) and the

classification at the repair station (pseudo defect) are listed again. Choosing the

button "Template" brings up the next menu, in which defect overview according

to analysis process is chosen.

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After clicking "OK" the next two diagrams are opened.

This time they are scaled according to analysis procedures.

Also here, the familiar filter settings (time filter and inspection plan filter) can be

taken over from the time axis diagram. In addition, the component filter is

automatically set to 0603R.

Meni_9 is obtained as TOP 1 and the only analysis process of this evaluation.

This results in the following question: are there several failed analysis windows

in one analysis process and if so, which analysis windows produce more

defects?

The results must be evaluated in order to give an answer, this time according to

window numbers, giving the following end result:

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The only defects occur in window number 900.

The following gives a brief summary of the explanations above:

• Most pseudo defects in inspection plan 2147483647_Top happen with

component type 0603R. The analysis process with the most failures is

Meni_9 with window number 900.

• This problem could be solved by slightly modifying the inspection pattern.

But it is not always a problem with the inspection pattern.

It is also possible that the cause can be found at a certain position on the

PCB (i.e. by shadowing on the component or by an outgoing circuit track).

In order to find out the cause, the chip 0603R must be evaluated according

to ID.

Since this kind of evaluation on the window number level is not reasonable, the

old evaluations must be used. Here, the possibility of cascading is important.