1.011.1_VPC使用手册.pdf - 第55页

54/144 3. VPC as Production Monitor The production monitor offers the po ssibility to evaluate the VPC data immediately after it is gener ated on the machine ("just in time" processing). At this point, the repa…

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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

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

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0 off MessageOnOverrun

1 display notice when limit is exceeded;

diagram type 3

0 off section unit

1 maximum number of subsequent limit

warnings per column

MessageTimeout 10 number of seconds after which certain

defect messages are automatically closed

The next step is opening the configuration set "Production monitor". The

previously seen Pareto diagram representing the machine to be monitored is

shown.

The properties of the production monitor are identical with the previous Pareto

evaluations except for:

the currently active path to si.name

activation of the options action control limit (70%) and

monitor inspection plan change

identical with the previous Pareto evaluation