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User Manual SIPLAC E F5/F5 HM 6 Vision functions Software version SR.407.xx 01/2001 US Edition 6.7 Guidelines for Describing Pack age Forms 379 edges. It i s, howev er , le ss su itable for di spla ying bri ght c omponen…
6 Vision functions User Manual SIPLACE F5/F5 HM
6.7 Guidelines for Describing Package Forms Software version SR.407.xx 01/2001 US Edition
378
NOTE 6
With respect to 0603 components, avoid the nozzle being displayed during imaging. If this seems
likely, remove the component from the nozzle and use the ’Illumination Option
’ (see page 325 to
see whether the nozzle did appear in the image.
6.7.8.5 General Information on Setting Illumination Values
– As a rule it is better to overilluminate the component than to underilluminate it. A saturated im-
age is preferable to a low-contrast image.
– Optimum illumination is attained when only the leads are imaged and the component body is
not shown.
– If you cannot clearly separate the image of the component body from the leads, we recom-
mend to illuminate body and leads equally and then to measure the outline.
6.7.9 Setting the Component Illumination on the 6-Segment Revolver Head
Camera (Vision Module for Flip-Chips, Bare Dies, etc, DCA Option)
6.7.9.1 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. 6
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 proceed is first to follow these instructions and then to adjust the parameters your-
self where necessary. It may well be that you come across a component where the leads are better
illuminated using values different than the ones suggested in these instructions. 6
The illumination system consists of four different illumination levels, the intensity of which can be
programmed separately. By using the individual illumination levels one at a time or in combination,
you can adapt the illumination to suit a wide range of components. 6
X-plane illumination level 6
The even illumination level is particularly suitable for flip-chips, µBGAs, and MELF components,
since it highlights the balls extremely clearly.
Flat illumination level 6
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
User Manual SIPLACE F5/F5 HM 6 Vision functions
Software version SR.407.xx 01/2001 US Edition 6.7 Guidelines for Describing Package Forms
379
edges. It is, however, less suitable for displaying bright component bodies and ceramic compo-
nents. 6
Middle illumination level 6
The middle illumination level can be used universally with a wide range of components. With bright
component bodies, ceramic components, µBGAs and flip-chips it should, however, only be used
at lower intensity levels. 6
Steep illumination level 6
The main application for the steep illumination level is for reflective leads, ceramic components
and bright component bodies. It is less suitable for bare dies, flip-chips or µBGAs. 6
NOTE 6
Most components will require a combination of these illumination levels to achieve optimum illu-
mination. Using one illumination level will only be successful in exceptional cases.
6.7.9.2 Pseudo color representation
The pseudo color representation provides a powerful and objective assessment of the illumina-
tion, by representing a brightness value in a color. 6
Color scale Brightness
white light
yellow
orange
red
brown
green
light blue
blue
violet
black dark
6 Vision functions User Manual SIPLACE F5/F5 HM
6.7 Guidelines for Describing Package Forms Software version SR.407.xx 01/2001 US Edition
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A contrast of at least 4 color scales between the lead and body is required for a measurement. In
the ‘Illumination’ menu of the package form manipulator, components are displayed in the pseudo
color representation on the station computer monitor. 6
6.7.9.3 Settings for Illuminating Standard Components
The standard range of components includes chips (0402 to 2220), tantalum capacitors, Melf com-
ponents, PLCCs, QFPs, SOs, SOJs, TSOPs, ICs, power components, flip-chips, µBGAs, BGAs
and bare dies. 6
For the components which are listed below the GF interpreter in the station computer uses the
default illumination parameters listed in Fig. 6.7 - 12
: 6
– Chips (0402 to 2220)
– Tantalum capacitors (component bodies, non-reflective)
– Melf
– PLCC, QFP, SO, SOJ, TSOP, ICs, power ICs
– Flip-chips, µBGAs, BGAs
– Bare dies
As a rule you will not need to change the illumination parameters for the standard components.6