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5 Vision Functions SIPLACE 80S-20/F4/F4-6/F5 User’s Manual 5.6 Test Component Edition 03/98 from Software Version SR.404.xx 5 - 94 Line engine er Optical measureme nt of B GAs and fli p-chips with the 80F 4 , 80F 4 -6 or…

SIPLACE 80S-20/F4/F4-6/F5 User’s Manual 5 Vision Functions

Edition 03/98 from Software Version SR.404.xx 5.6 Test Component

Line engineer 5 - 93

4. Lead-driven mode

See Section 5.6.4.14 from Page 5 - 109 for a definition of the measuring methods.

This measurement method can be recognized by

– either there being a window around a leads group (combined window, preset value)

– or there being a window around every single lead (separate window). By entering the hex code you can

modify the window types separate or combined window in the Measure mode menu.

Procedure:

Each lead will be measured in a way similar to corner-driven mode or the entire leads group will be measured.

Rectangles:

dark blue: search window around the entire leads group or around every

light blue: search window around the first lead in a group

green: x and y tolerances

Cross:

white: Results of position recognition-> x and y angles

Overlay:

gray: Profile in the integration direction in question

blue: Gradients from the above profiles

The gradients are only required and displayed for the profiles in the direction

of the leads.

yellow: Results from the geometric filter

red: Interpolation limits for position determination

light blue: Results of interpolation-> Position

Comments:

An overlay is available for both directions of interpolation.

5 Vision Functions SIPLACE 80S-20/F4/F4-6/F5 User’s Manual

5.6 Test Component Edition 03/98 from Software Version SR.404.xx

5 - 94 Line engineer

Optical measurement of BGAs and flip-chips with the 80F

, 80F

-6 or 80F

placement machines:

The crosshairs indicate the position of the component in the camera coordinates system. The outline of the

component will be emphasized by the use of color.

The measured values represent geometric component parameters such as

– Position in the camera coordinates system

– Rotation angle

– Maximum offset of the balls in x and y directions

– Factor for the quality of measurement

1. Grid-driven mode

See Section 5.6.4.14 from Page 5 - 109 for a definition of the measuring methods.

Grid-driven mode works with preset pattern tolerances and is therefore to be regarded as the first measure-

ment step in the optical surveying of BGAs and flip-chips. To ascertain the approximate position it will be ade-

quate to measure just a few connections.

The number of balls to be measured and the pattern tolerances define the size of the search window. The

rough position and the skew of the component are determined in corners mode - in other words, a search win-

dow size is defined for each corner of the component. This measurement method can be identified

– by the synthetic model being shown in pixel resolution at the lefthand edge of the video image, and

– by the 4 windows at the corners of the component.

Procedure:

– The algorithm defines 4 dark blue corner windows on the basis of the pattern tolerances and the balls

defined in the package form file. The default search value is 5 balls.

– A detection algorithm runs with the aim of detecting all balls corresponding to this type. Those found will be

marked with light blue crosses.

– The balls defined in the package form file are determined by the search algorithm. The balls found are

marked with a white outline. If defined balls are not found an error message will appear on the screen.

– From these data the rough position and the skew of the component are determined. The measured posi-

tion of the component is marked with white crosshairs.

Rectangle:

dark blue: 4 search windows, depending on the pattern tolerances and

the number of balls

Cross:

white: Ball model candidates found

Overlays:

white: Balls found which are defined in the package form file

SIPLACE 80S-20/F4/F4-6/F5 User’s Manual 5 Vision Functions

Edition 03/98 from Software Version SR.404.xx 5.6 Test Component

Line engineer 5 - 95

Crosshairs:

white: Results of position recognition -> x and y angles

Star:

white: Center of the component ->Position

Synthetic model representation at the lefthand edge of the video image:

Image: Model in pixel resolution

Points marked with red plus signs (+):

outside the circle:

Contrast < 0, ball is darker than the background

within the circle:

Contrast > 0, ball is lighter than the background

Points marked with yellow minus signs (-):

The difference between the plus and minus signs represents

the radial tolerance.

2. Ball-driven mode

See Section 5.6.4.14 from Page 5 - 109 for a definition of the measuring methods.

The method works with high precision and is thus suitable for precisely determining the position of all defined

balls. As a higher precision search, ball-driven mode will follow grid-driven mode.

This measurement method can be identified

– by the synthetic model being shown in pixel resolution at the lefthand edge of the video image,

– by there being a window around every ball (separate window) or

– by a window covering the entire component or over a defined row of balls (combined window) - this will

depend on the memory.

Procedure:

All of the balls defined in the package form file are surveyed. Geometric criteria are used here in the selection

of the window mode:

– If the separation of two balls is low (< 2 ball diameters) the combined window mode will be preferred.

– If the balls are relatively far apart the separate window mode will be selected. The default window mode is

the separate window mode.

Window:

dark blue: Over a single ball in each case (separate window)

Over a row or over all balls (combined window)