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5 Vision Functions SIP LACE 80S-20/F4/F5 Us er Manual 5.8 Recommendation for vis ually centering components 05/99 Issue from Software V ersion SR.405.xx 5 - 160 Line en gineer 5.8.4 Visuall y centering flip-chip s 5.8.4.…

SIPLACE 80S-20/F4/F5 User Manual 5 Vision Functions

05/99 Issue from Software Version SR.405.xx 5.8 Recommendation for visually centering components

Line engineer 5 - 159

5.8.2.4 Optimizing multiple measurements for screening plates

Screening plates that are larger than 32 mm x 32 mm are generally visually centered by multiple measure-

ment, although single measurement can still be used if you select a section of the component which is less

than 32 mm x 32 mm. To do this, select a characteristic, non-repeated ball pattern in order to avoid incorrect

placement.

Enter a value < 32 mm x 32 mm for the length and width of the component under the ’Case dimension’

option in the ’Test component’ menu.

5.8.3 General recommendations for centering flip-chips, BGAs and

screening plates

5.8.3.1 Setting the ball contrast parameters

If you select a high value for the ’Ball image’ option in the ’Test component’ menu, this will reduce the effect of

any defective structures. It does mean, however, that there is a possibility that not every ball will be detected.

Set a lower value to ensure that all the balls are detected. This will reduce the reject rate, but the measure-

ment will take longer.

5.8.3.2 Setting the ball radius parameters

Enter the ball radius on the line computer. This value is automatically reduced by 20 % since the vision sys-

tem will detect balls even if the specified dimensions are smaller then their actual physical dimensions.

So, set the ball radius on the station computer and then adjust the quality in the ’Measure’ menu.

– If no crosses are displayed on the ball, the radius is incorrect or the contrast is too high.

– If several crosses are displayed on a ball, then the radius has been entered incorrectly in the ’Measure’

menu.

PLEASE NOTE:

We recommend that you select a radius on the line computer that is slightly larger than the theoretical value

and then adjust it in the ’Ball image’ menu.

5.8.3.3 Setting the case shape dimension parameters on the station computer

For high-contrast flip-chips and BGAs, you can reduce the physical case shape dimension to the square sur-

rounding the balls (’Case dimension’ option). This will reduce the measuring time, although it can only be used

for single measurements. Size mode must also be active.

5 Vision Functions SIPLACE 80S-20/F4/F5 User Manual

5.8 Recommendation for visually centering components 05/99 Issue from Software Version SR.405.xx

5 - 160 Line engineer

5.8.4 Visually centering flip-chips

5.8.4.1 Setting the parameters on the station computer

Under the ’Illumination’ option in the ’Test component’ menu, select:

– a value of around 50 for the medium illumination plane

– a value of around 20 for the steep illumination plane

5.8.4.2 Recommended sequence of measurements for visually centering bare dies

Measuring mode Size Grid Ball

Settings

Resolution in the measuring direction:

very high

——

Resolution in the integration direction:

very high

——

Tab. 5.8.3 Recommended sequence of measurements for visually centering bare dies

SIPLACE 80S-20/F4/F5 User Manual 5 Vision Functions

05/99 Issue from Software Version SR.405.xx 5.9 Teach Fiducial: Additions with the 80F4 or 80F5 Machines

Line engineer 5 - 161

5.9

Teach Fiducial

: Additions with the 80F

or 80F

Machines

In contrast to the 80S-20 placement machine the 80F

or 80F

machine is a single-gantry machine. For this

reason in the

Teach fiducial

menu the

Select gantry

option is permanently set to

Gantry 1

. The

Gantry 2

option cannot be clicked on.

The IC placement head is mounted on the gantry, together with the 12x revolver placement head on the 80F

and the 6x revolver placement head on the 80F

automatic placement machines. The camera system for

board centering is accommodated on the gantry underside.

All menus with the exception of this option are identical to those of the 80S-20 machine.

A description of the menus and their options will be found in Section 5.5 from Page 5 - 37.

Fig. 5.9.1

Select fiducial

menu,

Select gantry

option