1.011.1_VPC使用手册.pdf - 第54页
53/144 2.1 Exercise 3: Please select the time axis diagram in the pull-down menu and start the evaluation. The time filter is preset. 1. There are seven inspection plans in the evaluation time period with a First Pass Yi…
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1 features group 1 (pseudo defects), group 2 (real defects)
2 Options:
- no bars with the value 0
- no bars with the value infinite
- automatic scaling of the Y-axis
- evaluate double track data separately
The smaller the first number in the respective bar, the more effective the
inspection pattern. The first number in the brackets is the number of inspection
windows with the features of the first group, divided by the number of inspection
windows with the features of the second group.
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2.1 Exercise 3:
Please select the time axis diagram in the pull-down menu and start the
evaluation. The time filter is preset.
1. There are seven inspection plans in the evaluation time period with a
First Pass Yield of less than 50%. Use the templates to analyze the
two inspection plans with the lowest FPY until you have received the
following information:
top pseudo defect component type
ID
window number
analysis process
How large is the first pass yield, when
the Top1 pseudo defect is eliminated?
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3. VPC as Production Monitor
The production monitor offers the possibility to evaluate the VPC data
immediately after it is generated on the machine ("just in time" processing). At
this point, the repair person has not yet carried out a classification. This does
not allow a statement about pseudo defects and real defects to be made, but
the process quality can be assessed. This process monitoring (production
monitor) can be carried out parallel to the "normal" process check, with the
precondition that all data is saved on one server.
Because some modifications in vpc.ini are necessary for the production monitor,
the VPC should be run on another computer or under a second account to
prevent continual manual editing of the data.
The following special vpc.ini configurations for the production monitor are
possible:
section [settings]
parameters description
0 also evaluate unrepaired defects(10000) SkipGroupErrors
1 skip unrepaired and group defects
0 every window is an defect OneErrorPerComp
1 count only one defect per component and
PCB
0 off CheckProgEnabled
1 globally activate automatic inspection plan
change; monitor si.name
0 off CheckProgReadOnFirst
1 read-in current inspection plan name with
first evaluation; monitor si.name