MV-9_Chapter 5. Teaching.pdf - 第187页
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MV-9 User Manual
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① Electrode inner blue ratio (Inner Blue Area <Electrode Area (%))
- Electrode inner blue ratio means ratio blue area inside of electrode based on electrode
area. If it is below setting value, judge as good.
② Electrode Inner Distance
- This will be activated only for 0402 chip. exclusive parameter for 0402 non-mounting
inspection.
- Default value is 180. Adjust it according to real size and pad size of 0402 chip that is real
inspection target.
- As shown in [Figure 5-171] below, non-mounting inspection area will be set according to
the size of extracted electrode. non-mounting inspection area for left electrode is the left of
electrode area at chip of width direction, up and down is same, and the right side is area
that is expanded to between boundary line on the right side of electrode and pad offset. If
blue ratio is higher than reference value in this area, judge as non-mounting.
- Therefore, make sure to set it to make size of electrode extracted from chip body tap and
size of red electrode extracted by color map adjustment in [pad inspection → color map →
Electrode] selection are similar in the setting stage.
[Figure 5-228 chip color inspection detailed window area]
Lifted inspection (Center Rect)
- Generally, if lifted defect occurs, lifted inspection (Center Rect) shows red component next
to electrode. Hence, to detect lifted defect, as shown in [Figure 5-172], set size and normal
criteria of Center Rect using this function.
① Wide (%)
- This is to set width of Center Rect. To extract pad, set it to percentage to pad width, and
not to extract pad, set it to percentage to size of chip electrode.
② Length
错误!使用“开始”选项卡将 제목 2 应用于要在此处显示的文字。错误!使用“开始”选项卡将 제목 2 应用
于要在此处显示的文字。 .
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- Length of Center Rect chip length direction.
③ Offset
- This is to set the away distance of Center Rect based on electrode end.
[Figure 5-229 lifted inspection (Center Rect) setting item]
④ Blue Ratio (%): set Blue ratio in Center Rect.
⑤ Red Ratio (%): set Red ratio Center Rect.
⑥ Cold Solder Check
- Set whether to conduct cold solder inspection for chip. In general, for lifted inspection, set
color map to include yellow area (cold solder) in [pad inspection → color map → Pad].
- After setting to detect cold solder defect, If many false defects are occurred during lifted
inspection for Center Rect, separate color map for lifted inspection and cold solder
inspection. The following is separation method.
Exclude yellow area from Pad color map
Select Cold Solder Check in pad inspection tap
Select cold solder in color map, and set only yellow area for cold solder inspection
in color map
- In general, most of cold solder defects displayed in yellow between electrode and pad.
Sometimes, the defect displayed in sky-blue, orange, or pink. Therefore, if necessary,
select pentagon in color map and adjust it as shown in the [Figure 5-247] below.
MV-9 User Manual
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[Figure 5-230 Color map for detection of cold solder _pentagon setting example]
⑦ Yellow (%) <
- Set cold solder inspection criteria parameter. Yellow ratio in Center Rect.
⑧ Position
- Cold solder inspection criteria parameter. Decide the degree of trespass of yellow area to
judge as cold solder in Center Rect. this parameter is used to reduce occurrence of false
defect due to creation of yellow area at outside end of Center Rect.
- If setting value is default value (-1), if it is above setting Yellow (%) regardless of the
position of yellow area, judge as defect. If position value is set to „0‟, that means that
yellow area is located at opposite end of electrode in Center Rect. The larger value is, the
closer yellow area is expanded near electrode. (Refer to [Figure 5-248].).
- For example, If position value is set to „3‟, it is not judged as cold solder even when yellow
area is expanded up to 3 pixels from outside end of Center Rect toward electrode. If
position of yellow detection area is „7‟ under this setting, it means that it is expanded more
closely to electrode than reference position at which yellow area is set and judged as cold
solder defect. Max value of position value is the length of Center Rect.