80S-2080F480F5.pdf - 第367页
SIPLACE 80S-20/F4/F5 User M anual 5 Vision Func tions 05/99 Issue from Software Version SR.405.xx 5.7 Guidelines for D escribing Package F orms Line en gineer 5 - 135 Flat illumination level The flat i llumina tion leve …
5 Vision Functions SIPLACE 80S-20/F4/F5 User Manual
5.7 Guidelines for Describing Package Forms 05/99 Issue from Software Version SR.405.xx
5 - 134 Line engineer
Fig 5.7.6 Typical measuring modes with standard components (software version
≥ 402.xx)
5.7.6 Setting the Components Illumination at the 12x Revolver Head
Camera
5.7.6.1 General Information on Illumination Methods
The idea of illumination setting is to obtain an image of the leads of a component which is as high-contrast as
possible. At the same time it is also important to suppress representation of the body of the component.
These instructions are intended to help you find the best possible illumination parameters. This, however,
does not imply that you rigidly comply with the values specified in these instructions. The way you should pro-
ceed is first to follow these instructions and then to adjust the parameters yourself where necessary. It may
well be that you come across one or other component the leads of which are better illuminated using values
different to the ones suggested in these instructions.
The illumination system comprises three different illumination levels. The intensities can be programmed indi-
vidually. By using the individual illumination levels one at a time or in combination with one another you can
adapt the illumination to suit a wide range of components.
Chip
IC
Melf
BGA, µBGA
Flip chip
Tantal
capacitor
0402,
0603, etc.
General
SIZE
high
resolution
Small
Small
BGA
SIZE
LEAD
outer tip
SIZE
LEAD
outer tip
SIZE (depends
on the comp.
size)
SIZE
CORNER
outer tip
LEAD
outer tip
SOJ,
PLCC
SIZE
CORNER
Lead center
LEAD
Lead center
Large
Large
CORNER
outer tip
LEAD
outer tip
ROW
outer tip
SO,
QFP
PLCC
CORNER
Lead center
LEAD
Lead center
ROW
Lead center
GRID
BALL
SO, SOT
QFP
Flip Chip
SIZE (depends
on the comp.
size)
GRID
BALL
SIPLACE 80S-20/F4/F5 User Manual 5 Vision Functions
05/99 Issue from Software Version SR.405.xx 5.7 Guidelines for Describing Package Forms
Line engineer 5 - 135
Flat illumination level
The flat illumination level is used for illuminating BGAs, µBGAs, flip-chips, J-lead components (PLCC), Melfs
and components with convex-type leads. It tends to emphasize body and lead edges. It is, however, less suit-
able for displaying bright component bodies and ceramic components.
Middle illumination level
The middle illumination level can be used universally with a wide range of components. With bright compo-
nent bodies, ceramic components, µBGAs and flip-chips it should, however, only be used at lower intensity
levels.
Steep illumination level
The main application for the steep illumination level is for reflective leads, ceramic components and bright
component bodies. It is less suitable for reflective component bodies, flip-chips or µBGAs.
NOTE
Most components will require a combination of these three illumination levels to achieve optimum illumination.
Using
one
illumination level will only be successful in exceptional cases.
5 Vision Functions SIPLACE 80S-20/F4/F5 User Manual
5.7 Guidelines for Describing Package Forms 05/99 Issue from Software Version SR.405.xx
5 - 136 Line engineer
5.7.6.2 Pseudo color representation
The pseudo color representation provides a powerful and objective assessment of the illumination, by repre-
senting a brightness value in a color.
A contrast of at least 4 color scales between the lead and body is required for a measurement. In the ‘Illumina-
tion’ menu of the package form manipulator, components are displayed in the pseudo color representation on
the station computer monitor.
5.7.6.3 Settings for Illuminating Standard Components
The standard range of components includes chips (0402 to 2220), tantalum capacitors, Melf components,
PLCCs, QFPs, SOs, SOJs, TSOPs, ICs, power components, flip-chips, µBGAs and BGAs.
For the components which are listed below the GF interpreter in the station computer uses the default illumi-
nation parameters listed in Fig. 5.7.7:
– Chips (0402 to 2220)
– Tantalum capacitors (component bodies, non-reflective)
– Melf
– PLCC, QFP, SO, SOJ, TSOP, ICs, power ICs
– Flip-chips, µBGAs, BGAs (not ceramic BGAs)
As a rule you will not need to change the illumination parameters for the standard components. For all other
components you will need to determine the illumination values and test them (see Section 5.7.6.4, Page 5 -
137).
Color scale Brightness
white light
yellow
orange
red
brown
green
light blue
blue
violet
black dark
Tab. 5.7.3 Conversion table for the pseudo color representation at the 12x revolver head